Vermitechnology is the science dealing with the importance and use of earthworm species in addressing environmental and ecological problems. It utilizes earthworms like Eisenia fetida and Perionyx excavates to stabilize organic wastes through vermicomposting. During vermicomposting, earthworms physically fragment waste and increase its surface area while promoting microbial activity. This aerobic decomposition converts nutrients like nitrogen, phosphorus and potassium into more soluble and available forms, producing a nutrient-rich end product called vermicompost. Vermicompost has physical and chemical properties that make it a valuable organic fertilizer and soil conditioner.
PHOSPHATE SOLUBILIZERS
INTRODUCTION
Phosphate SOLUBILIZERS are a group of beneficial micro-organisms capable of breaking down of organic and inorganic insoluble phosphorous compounds to soluble P form that can easily be assimilated by plants.
Phosphorous (P) is a major growth-limiting nutrient, Plants acquire phosphorus from soil solution as phosphate anion.
TYPES
MECHANISM
ISOLATION
INOCULANT PRODUCTION
INOCULANT APPLICATION
ROLE OF PHOSPHATE SOLUBILIZERS
Lignocelluloses, the major component of biomass, makes up about half of the matter produced by photosynthesis. It consists of three types of polymers – cellulose, hemicellulose, and lignin – that are strongly intermeshed and chemically bonded by non-covalent forces and by covalent cross-linkages. A great variety of fungi and bacteria can fragment these macromolecules by using a battery of hydrolytic or oxidative enzymes. In native substrates, binding of the polymers hinders their biodegradation. Molecular genetics of cellulose-, hemicellulose- and lignin-degrading systems advanced considerably during the 1990s. Most of the enzymes have been cloned, sequenced, and expressed both in homologous and in heterologous hosts. Much is known about the structure, genomic organization, and regulation of the genes encoding these proteins.
Utilization of Agro-industrial waste and by products.pptxRehanaRamzan3
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Rhizobia are symbiotic diazotrophs (prokaryotic organisms that carry out dinitrogen fixation) that form a symbiotic association with legumes. This association is symbiotic in that both the plant and rhizobia benefit. The plant supplies the rhizobia with energy in the form of amino acids and the rhizobia fix nitrogen from the atmosphere for plant uptake. The reduction of atmospheric dinitrogen into ammonia is the second most important biological process on earth after photosynthesis (Sylvia, 2005). The actual process of dinitrogen fixation can only be carried out by diazotrophs that contain the enzyme dinitrogenase. Nitrogen is the most critical nutrient needed to support plant growth. Unfortunately, atmospheric dinitrogen (78% of air we breathe) is extremely stable due to triple bonds which can only be broken by energy intensive ways. These include electrical N2 fixation by lightning where oxides of N come to ground with rain, the Haber-Bosch process in industrial fertilizer production, and biological N2 fixation in legumes by bacterial symbionts such as Rhizobium etli. Biological fixation of nitrogen was the leading form of annual nitrogen input until the last decade of the 20th century (Russelle, 2008). It is gaining attention once again as sustainability becomes a central focus to feed a world population of over 7 billion people.
PHOSPHATE SOLUBILIZERS
INTRODUCTION
Phosphate SOLUBILIZERS are a group of beneficial micro-organisms capable of breaking down of organic and inorganic insoluble phosphorous compounds to soluble P form that can easily be assimilated by plants.
Phosphorous (P) is a major growth-limiting nutrient, Plants acquire phosphorus from soil solution as phosphate anion.
TYPES
MECHANISM
ISOLATION
INOCULANT PRODUCTION
INOCULANT APPLICATION
ROLE OF PHOSPHATE SOLUBILIZERS
Lignocelluloses, the major component of biomass, makes up about half of the matter produced by photosynthesis. It consists of three types of polymers – cellulose, hemicellulose, and lignin – that are strongly intermeshed and chemically bonded by non-covalent forces and by covalent cross-linkages. A great variety of fungi and bacteria can fragment these macromolecules by using a battery of hydrolytic or oxidative enzymes. In native substrates, binding of the polymers hinders their biodegradation. Molecular genetics of cellulose-, hemicellulose- and lignin-degrading systems advanced considerably during the 1990s. Most of the enzymes have been cloned, sequenced, and expressed both in homologous and in heterologous hosts. Much is known about the structure, genomic organization, and regulation of the genes encoding these proteins.
Utilization of Agro-industrial waste and by products.pptxRehanaRamzan3
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Rhizobia are symbiotic diazotrophs (prokaryotic organisms that carry out dinitrogen fixation) that form a symbiotic association with legumes. This association is symbiotic in that both the plant and rhizobia benefit. The plant supplies the rhizobia with energy in the form of amino acids and the rhizobia fix nitrogen from the atmosphere for plant uptake. The reduction of atmospheric dinitrogen into ammonia is the second most important biological process on earth after photosynthesis (Sylvia, 2005). The actual process of dinitrogen fixation can only be carried out by diazotrophs that contain the enzyme dinitrogenase. Nitrogen is the most critical nutrient needed to support plant growth. Unfortunately, atmospheric dinitrogen (78% of air we breathe) is extremely stable due to triple bonds which can only be broken by energy intensive ways. These include electrical N2 fixation by lightning where oxides of N come to ground with rain, the Haber-Bosch process in industrial fertilizer production, and biological N2 fixation in legumes by bacterial symbionts such as Rhizobium etli. Biological fixation of nitrogen was the leading form of annual nitrogen input until the last decade of the 20th century (Russelle, 2008). It is gaining attention once again as sustainability becomes a central focus to feed a world population of over 7 billion people.
he rhizosphere is the narrow region of soil or substrate that is directly influenced by root secretions and associated soil microorganisms known as the root microbiome.
The phyllosphere is a term used in microbiology to refer to the total above-ground portions of plants as habitat for microorganisms.
It is a biofertilizer that contains symbiotic Rhizobium bacteria which is the most important nitrogen-fixing organism. These organisms have the ability to drive atmospheric Nitrogen and provide it to plants. It is recommended for crops such as Groundnut, Soybean, Red-gram, Green-gram, Black-gram, Lentil, Cowpea, Bengal-gram and Fodder legumes, etc.
Basic Knowledge about industrial microorganism. why industry choose microorganism rather than chemical. isolation technique of microorganism. source of microorganisms. Process of using microorganism. Disadvantages of using microorganisms in industry. Process of genetic modification of microorganisms. Storage process of microorganism. preservation methods of microorganism. Reculture methods of microorganism.
Cyanobacteria as a Biofertilizer (BY- Ayushi).pptxAyushiKardam
Cyanobacteria, also known as “blue-green algae”.
They are aquatic and photosynthetic, that is, they live in the water, and can manufacture their own food. Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see.
They are the most abundant group of organisms on the earth. They are autotrophic and found in a diverse environment, especially in the marine and freshwater.
he rhizosphere is the narrow region of soil or substrate that is directly influenced by root secretions and associated soil microorganisms known as the root microbiome.
The phyllosphere is a term used in microbiology to refer to the total above-ground portions of plants as habitat for microorganisms.
It is a biofertilizer that contains symbiotic Rhizobium bacteria which is the most important nitrogen-fixing organism. These organisms have the ability to drive atmospheric Nitrogen and provide it to plants. It is recommended for crops such as Groundnut, Soybean, Red-gram, Green-gram, Black-gram, Lentil, Cowpea, Bengal-gram and Fodder legumes, etc.
Basic Knowledge about industrial microorganism. why industry choose microorganism rather than chemical. isolation technique of microorganism. source of microorganisms. Process of using microorganism. Disadvantages of using microorganisms in industry. Process of genetic modification of microorganisms. Storage process of microorganism. preservation methods of microorganism. Reculture methods of microorganism.
Cyanobacteria as a Biofertilizer (BY- Ayushi).pptxAyushiKardam
Cyanobacteria, also known as “blue-green algae”.
They are aquatic and photosynthetic, that is, they live in the water, and can manufacture their own food. Because they are bacteria, they are quite small and usually unicellular, though they often grow in colonies large enough to see.
They are the most abundant group of organisms on the earth. They are autotrophic and found in a diverse environment, especially in the marine and freshwater.
A modern method of agriculture with minimum cost of production and maximum yield using new technological approach,accelerating agricultural output through effective utilization of natural resources practiced under any natural ecosystem.
Composting is nature's process of recycling decomposed organic materials into a rich soil known as compost. Anything that was once living will decompose
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
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Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
UNDERSTANDING WHAT GREEN WASHING IS!.pdfJulietMogola
Many companies today use green washing to lure the public into thinking they are conserving the environment but in real sense they are doing more harm. There have been such several cases from very big companies here in Kenya and also globally. This ranges from various sectors from manufacturing and goes to consumer products. Educating people on greenwashing will enable people to make better choices based on their analysis and not on what they see on marketing sites.
Natural farming @ Dr. Siddhartha S. Jena.pptxsidjena70
A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
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"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...
vermicomposting.ppt
1. Vermitechnology
The branch of science that deal with the importance and utilization of
different epigeicearthworm (live in area with high organic matter) species to
answer the problems related to ecology and environment is known as
Vermitechnology.
2.
3. Vermitechnology is useful technique for stabilization of both industrial
and domestic organic waste, organic farming and waste water
treatment.
Vermitechnology is an aerobic decomposition of organic wastes that
depends upon earthworms for fragmentation, mixture and promotion of
microbial activity.
During feeding, the earthworms fragment the waste materials that
results in increase of its surface area for further colonization of
microorganisms.
4. Charles Darwin was the pioneer of vermitechnology related studies. He was the first man on
this planet to demonstrate the role of earthworms in the ecosystem. He published a book
entitled“The formation of humus throughtheactionof earthworms” intheyear 1881.
Since then, it has taken almost a century to appreciate its important -contribution in curbing
organic pollution andproviding topsoil inimpoverished lands.
Since 1981, there has been increasing interest in possible methods of processing organic
wastes usingearthworm toproduce valuable soil additives.
Since then bothdeveloping and developed nations have adapted vermitechnology as atool for
different organic waste management practices.
5. Vermicast or vermicompost, which is the final product of vermin-composting, is richer in nutrients
thantheinitialrawmaterials.
Vermicast appears as a peat-like material which is capable of showing high water holding capacity,
porosity, drainage,aerationandmicrobialactivity.
In vermicomposting, the essential plant macronutrients such as nitrogen (N), phosphorus (P) and
potassium (K) present in the organic waste materials are converted through the action of
microorganisms into much more soluble and stabilized forms which are easily available to the plants
ascomparedtothe parentsubstances.
Vermicompostingisbestsuitedformesophilictemperaturerangesuchas35-40°C.
By both mechanical and biochemical actions of earthworms, it prepares organic manures and
combinesitwithsoilparticles.
6. Selection of suitable earthworm species for vermicomposting is the most important aspect of
vermitechnology. Vermicompost produced by different earthworm species exhibit significant
variation inrespectofnutrientcomposition.
Perionyx excavates, Eisenia fetida, Eudrilus eugeniae and Metaphire posthuma exhibit greater
range of tolerance in extreme atmospheric conditions than any other species of earthworms. So
these are the most widely used species of earthworms for vermicomposting of organic waste
materials.Theycantoleratehigh temperatureupto42°Candlowsoiltemperaturebelow5°C.
7. It is assumed that earthworm excretes certain vitamins, metabolites and similar substances into the soil which
canbeDvitaminor Bvitamin.
Thevermicompostthose obtained fromanimal wastesources havemoremineral elements than the commercially
availableplantgrowth media.
The quality and quantity of nutrients present in vermicompost and its superiority over traditional compost or
synthetic plant growth media can be explained by higher rate of humification (formation of humus. Humus
is black amorphous substance produced by the decomposition of dead and decaying
organic matter by microorganisms), breakdown of polysaccharides and accelerated mineralization of
organic matterresultingfromearthwormactivitiesduring vermicomposting.
8.
9.
10.
11.
12. The peristomium is
the first true body
segment in an annelid
worm's body in the
anterior end. It is
directly behind the
prostomium and
contains the mouth,
tentacular cirri, and
sometimes feeding
palps, which may
instead occur on the
prostomium
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23. VERMICOMPOSTING
Both physical and biochemical process are involved in the actions of the
earthworms.
Physical actions included are fragmentation, and aeration.
Biochemical actions involves enzymatic digestion, nitrogen enrichment,
transport of inorganic and organic materials.
During the biochemical process, important plant nutrients such as phosphorous,
potassium, nitrogen and calcium present in the waste materials are converted
through microbial action into such chemical forms which are much more soluble
and available to the plants than those in the parent substrate.
24. Earthworms not only are important for maintaining the role in plant nutrients
cycling, but also, they are equally responsible for maintenance of soil texture and
turnover of organic matter.
In agro-ecosystems, the most important effect of earthworms is the increase in
nutrient cycling, particularly nitrogen.
Overall, earthworms affect the physico-chemical properties of soil..
Vermicompost’s can also be defined as a sustainable biofertilizer generator from
organic wastes.
25. Physiology of Digestion
Earthworm feeds on dead and decaying organic matter present in the soil. This material is
gathered at night. The digestion of earthworm is an extracellular process.
The mouth and the buccal cavity takes part in the ingestion. There are many chemoreceptors present near
the mouth region which help in identifying chemicals and food they eat.
Food particles are drawn into the buccal cavity when the pharyngeal cavity is enlarged by the contraction
of muscles that extend from pharynx to the body wall.
The food is acted on by proteolytic enzymes present in pharynx which hydrolyse proteins and mucin helps
in the lubrication of food.
The food comes to gizzard passing through oesophagus. The gizzard works like a grinder. The food is
broken into minute particles by squeezing and rolling action.
The ground food enters the stomach where calciferous glands help in neutralizing the acid of the
food.
26. Then the food moves to the intestine, here amylase present in the intestinal caeca convert starch into
glucose.
Complete digestion of food takes place in the intestine. Various enzymes present in the intestine act on
food and digested food gets absorbed. Typhlosole increases the absorption surface of the intestine.
The undigested food passes to the rectum where water gets absorbed and the undigested food
is egested out through the anus in the form of castings.
The enzyme present in the intestine are:
Protease: Protein to amino acids
Amylase: Starch to glucose
Lipase: Fats to fatty acid and glycerol
Cellulase: Cellulose to glucose
Chitinase: hydrolyse glycosidic bonds in chitin
27. Success of vermicomposting process depends on a number of abiotic and biotic factors:
Abiotic Factors
Some of the very important abiotic factors which affect vermicomposting process include pH,
temperature, moisture content, aeration, feed quality, light, C:N ratio etc.
Moisture Content:
It is a necessary requirement for the working of earthworms and microorganisms in
vermicomposting system. Adequate amount of moisture is required. Since, earthworms breathe
through their skin; the system must have adequate moisture content. 60%-80% of moisture is ideally
required for vermicomposting.
Due to physical and chemical differences in feed stocks there may be slight variations. Even a 5%
difference in moisture content significantly affects the clitellum (The clitellum is a thickened
glandular and non-segmented section of the body wall near the head in earthworms and leeches,
that secretes a viscid sac in which eggs are stored) development in Eisenia fetida worm species.
28. pH
The acceptable pH range, suitable for earthworms and microorganism’s activity, is
5.5–8.5. Optimum pH is neutral or near neutral.
The pH value of feed substrates undergoes considerable changes during
vermicomposting. During vermicomposting of feed substrate, at the very initial stage, a
low pH is observed. The reason is that initially, during vermicomposting, there is
formation of carbon dioxide and volatile fatty acids.
Subsequently, with the evolution of CO2 and utilization of volatile fatty acids, the pH
begins to increase as the process progresses
29. Temperature
Earthworms grow at an optimum temperature range of 12-28 degree C. With the
increase in temperature, there is a significant effect in the activity of earthworms.
It is generally recommended that temperature should be maintained above 10 degree C
in winter and it should be maintained below 35 degree C in summer. Decrease in
temperature results in reduced metabolic activity of earthworms and also, they are not
able to reproduce.
At very low temperatures, earthworms do not consume food. At higher temperature
(above 35 degree C) metabolic activity and reproduction of earthworms begins to
decline and mortality occurs. Variations in preferences for temperature as well as in
tolerance vary from species to species.
30. Aeration
Since, they are aerobic, oxygen is essential for vermicomposting. Earthworms
consume oxygen, which is a function for their microbial, oxygen levels are also
related to substrate temperatures.
Continuous supply of moisture will result in poor aeration during
vermicomposting system and can also affect the oxygen supply to worms.
Ammonia and salt content:
Earthworms cannot survive in organic wastes containing high levels of
ammonia. Worms are also very sensitive to salts and they prefer salt contents less
than 0.5%. However, many types of manures have high salt contents and if they
are to be used as bedding, they should be leached first to reduce the salt content,
it is done by simply running water through the material for a period of time.
31. Feed Quality
One of the major requirements for vermicomposting process of earthworm is
suitable feed material. Variations are observed in the amount of food which can be
consumed by earthworms. It is so because of a number of factors such as the state of
decomposition of food, C: N ratio of food, food particle size, salt content in food,
etc. Minimum particle size of feed waste ensures the worms to accelerate the
process of vermicomposting. Due to small particle size of feed waste, aeration is
provided properly through the pile of waste material which is later on available to
worms. A worm generally consumes food of about 100 to 300 mg/g body
weight/day. Nutrition is provided to earthworms from living microorganisms,
organic materials, and by decomposing macro-fauna.
32. Light
Since earthworms are photophobic in nature, they should be kept away
from light.
C: N Ratio
Growth as well as reproduction of earthworms is also affected to some
extent by the C: N ratio of feed material. Higher C:N ratio in the feed
material accelerates the growth and reproduction of worms. Waste
degradation is slowed due to too high or too low C:N ratio. Plants cannot
assimilate mineral nitrogen unless the C: N is in the range of 25–20:1.
33. BIOTIC FACTORS
A number of biotic factors also affect the vermicomposting process which
includes microorganisms, enzymes earthworms stocking density, etc.
A number of activities such as reproduction rate, feeding rate, respiration rate,
and burrowing activity affect the earthworm population, i.e. stocking density
during vermicomposting.
Mortality rate increases in higher population densities. One earthworm produces
reduced amount of cocoon. Also, growth rate is decreased. Marked reduction in
rate of growth as well as reproduction in E. andrei has also been observed due to
increase in stocking density.
A rapid turnover of fresh organic matter into earthworm casts was also seen due
to high population densities of earthworms
34. Microorganisms
•The microbes present in the vermicomposting process plays a very important role in
waste composition of those particular components. Stabilization of organic matter
due to mutualistic interaction is seen between earthworms and microorganisms
during vermicomposting.
•Earthworms consume fungi with organic substrates to fulfil their protein or nitrogen
requirement, fungal population in earthworm casts was almost equal or higher than
that of initial substrates.
•The micro-organisms not only mineralize complex substances into plant available
form, but they also synthesise biologically active substances
35. Enzymes
•Complete stabilization requires enzymatic action for chemically organic wastes are
very complex. The worms stimulate enzymes in their gizzard and intestine. A quick
biochemical conversion, as a result, a rapid biochemical conversion of proteinaceous
and cellulosic materials takes place.
•Most common enzymes required in vermicomposting are cellulases, amidohydrolase,
proteases, urease, b-glucosidases, and phosphatases. Enzyme activities have often been
used as indicators of microbial activity and can also be useful to interpret the intensity
of microbial metabolism in soil.
•Being a catalyst of a number of metabolic functions, they also decompose and detoxify
a number of contaminants
36. Status of Earthworms
•All over the world, there are about 3,320 species of earthworms.
•It has already mentioned that with about 590 species of earthworms, found in
different ecological preferences, the functional role of a number of the species
and their influence on the habitat are lacking.
37. Habitat of Earthworms
Species of earthworms have different ecological niches, life style habitat
characteristics, and life span. The dispersal of earthworms is related to the physico-
chemical characteristics of soils.
Prominent among these are pH, carbon, nitrogen temperature, moisture, and C:N
ratio etc. Majority of earthworm species prefer soil with a moisture of 12–34%,
temperature of 10–35 0 C, pH of about 7 and C:N ratio 2–8. Earthworms are
generally absent or rare in soil with a very rough texture in soil and high clay
content, or soil with pH
38. Eisenia Fetida
The most prevalent earthworm for vermicomposting is Eisenia fetida. Most
popularly it is also known as red wriggler, red worm, tiger worm etc. The
species has been widely used for various toxicological studies as test worm.
Upto 1500 mg body weight can be acquired by mature earthworms. An adult
worm on maturation produces one cocoon every third day. On hatching from
each cocoon within almost 23 days 1-3 individuals emerges.
39.
40. General properties of vermicompost
In terms of sustainable crop production, the acceptability of vermicompost has
been rising rapidly as soon as the human realizes the significance of organic inputs
in crop field. The excreta of earthworms, which is considered as the main product,
that is, vermicompost has several characteristics. These are:
Physical properties
A good vermicompost is always non-toxic, well-decomposed, ecologically
compatible, and environment friendly.
Any type of green waste viz. municipal waste, agricultural waste, sewage sludge,
industrial waste, and human feces can be used for the conversion by earthworm.
When turning of soil is occurred in proper manner, it is symptomatic to aerobic
decomposition which will produce normal odor after preparation. If there is
improper aeration, foul odor can be formed.
The final outcome of vermicomposting would be comprising of fine particulate
structure, granular form.
Vermicompost plays the role of a “soil conditioner” by improving the soil porosity,
drainage, and water holding capacity.
41. Properties Compost Vermicompost
pH 7.16 7.72
EC (dSm−1) 3.65 6.88
OC 20.5 17.3
Total N (%) 2.42 3.5
Total P (%) 0.88 0.71
Total K (mg.kg−1) 653.5 950.5
Total Ca (%) 2.9 3.5
Total Mg (%) 1.5 2.8
Total Fe (mg.kg−1) 4467 6045
Total Zn (mg.kg−1) 115.5 189.5
Total Cu (mg.kg−1) 59 38
Total Mn (mg.kg−1) 221.45 344.15
C:N 8.47 5.51
42. Chemical properties
Vermicompost is rich in almost all essential macro and micro plant nutrients. Several experiment states that average
nutrient contentofvermicompostisgreaterthanother conventionalcompost, producedfromother procedures.
Amongallthe secondarynutrients, calciumcontentin vermicompostishigher than othercompost.
In contrast with other conventional compost, vermicompost contains worm mucus which facilitates in preventing
washingawayofnutrients presentthere[20].
Duetovermi-conversion, heavymetalpresent infeedingmaterialisfoundtobereducedinearthwormcastowingtoits
accumulationin wormtissue.Accordingtothefeedused,therateofremovalofheavymetaldependsin
vermicompostingtechniques.Thisproperty makesvermicompostlessercontaminantthananyother compost.Thus,it
becomesmoreenvironmentallysustainable[21].
Therearecertaindifferencesfoundin chemicalproperties betweensimplefarmyardcompostandvermicompost.
Vermicompostrangeshigher in macroandmicro-nutrients aswellassoilorganiccarbonstatusthat canbeobserved
fromthe Table.
43. Biological properties
The by-product of earth casting is an inhabitant of several microorganism,
viz. bacteria, fungi, and actinomycetes. These micro-organisms release
several enzyme and phytohormones which helps in improving plant growth.
Thus, vermicompost facilitates both microbial and enzymatic activity [22, 23].
The microbial population of nitrogen fixer bacteria and other symbiotic
associative bacteria are supposed to be in a good range of numbers in the
excreta of earthworm.
In addition, earthworm casts harbor a large number of vesicular-arbuscular
mycorrhiza (VAM) propagules. These propagules survive up to 11 months on
the cast, and helps in increasing microbial activity to produce nitrogen and
phosphorus in readily available form to the plant.
44. Properties Impact
Soil physical properties
Soil aggregation, soil structure, and water holding capacity,
infiltration rate improves after vermicompost application.
Soil chemical properties
Vermicompost also offers a greater chance for reducing salinity,
alkalinity, and reduction of heavy metal contamination.
Soil microbial properties Microbial biomass is also increases with the use of vermicompost.
45. Beneficial effects of vermicompost
Effect of vermicompost on the soil physiochemical properties
Addition of vermicompost improves soil physico-chemical properties viz. soil structure, soil water
holding capacity, penetration resistance, bulk density, soil organic carbon, aggregation, nutrient content,
etc. According to the findings of various long term research addition of vermicompost reduces the bulk
density of the soiland increases the waterholding capacity ofsoil [25]. Aksakaletal. [26] found that when
vermicompost was added in the soil, the mean bulk density, and mean total porosity were the least. Air
permeability rose and penetration resistance reduced dramatically as wet aggregate stability improved
and bulk density reduced. Increased microbial population and activity led in the development of
aggregates and increased soil porosity, resulting in decreased particle and bulk densities.
Physicochemical characteristics such as pH, electrical conductivity (EC), porosity, moisture content,
water holding capacity, and chemical properties like nitrogen, phosphorous, potassium, calcium, and
magnesium were all found to be significantly improved in vermicompost treated soil, while the
corresponding physicochemicalvaluesin control soilwereminimalinricecrop[27].
46. Vermicompost has indeed been found to have significant concentration of total and bioavailable nitrogen,
phosphorus, potassium (NPK), and micronutrients, as well as microbial and enzyme activity and growth
regulators [28]. Polysaccharides appeared to be abundant in vermicompost [29]. Polysaccharide worked as
a cementing ingredient in the soil, causing aggregate stability, which helped to establish and maintain the
soil structure for improved aeration, water retention, drainage, and aerobic conditions. The preservation of
soil structure is essential for root elongation and nutrient uptake. The inclusion of mucus secretion and
microorganisms from the earthworm’s gut improves the soil’s aggregate stability. The absorbent organic
matter in vermicomposts increases the soil’s water retention capacity by holding only the quantity of water
required by the plant roots [30]. Vermicomposts have been found to have a higher base exchange capacity
and a higher oxidation potential rise [31]. The C/N ratio of vermicompost is usually lower, indicating that it is
more suited for use as a soil amendment. By altering the physiochemical parameters of the soil,
vermicompost was able to limit the loss of nutrients through leaching [32]. Humic acid and biologically active
compounds like plant growth regulators are abundant in vermicompost [33]. Humic acid has been proven to
improve nutrient accretion in situations where nutrients are scarce or when additional nutrients are provided.
Humic acids may have a hormone-like effect on plant growth and productivity as a result of their involvement
in cell respiration, photosynthesis, oxidative phosphorylation, biogenesis, and a variety of other enzymatic
functions.
47. Effect of vermicompost on the soil biological properties
Biological properties of soil can be enhanced through application of
vermicompost. Recent studies founded that soil biological characteristics viz. soil
organic carbon as well as soil microbial biomass, enzymatic activity, population of
different beneficial microorganism, hormones, etc. significantly enhanced with
application of vermicompost [34]. The activity of the dehydrogenase enzyme,
which is commonly employed to quantify the respiratory activity of microbial
communities, was shown to be higher in vermicompost than in commercial
medium [35]. Application of vermicompost improved the nitrogen status of soil by
introducing the beneficial microorganism in the rhizosphere of the plant which
ultimately enhances the nitrogenase activity in soil, which is the enzyme
responsible for nitrogen fixation
48. Effect of vermicompost on the soil fertility
Vermicompost has a great importance to increase the soil fertility level. In recent
years organic amendments are getting more importance for nutrient
management and sustainable crop production since the long-term use of
inorganic fertilizer lacking organic additives has the ability to ruin soil qualities
[34]. Long-term treatment of balanced inorganic fertilizers led to reduced soil bulk
density, improved total porosity, and higher water-holding capacity. Inorganic
fertilizers also promoted soil aggregation in deeper soil layers and raised maize
and wheat grain and straw yields [38]. In their research, using farmyard manure
(organic fertilizer) instead of inorganic fertilizer improved soil qualities in a similar
way. Furthermore, compost provides substantially higher boosts in soil organic
carbon as well as some plant nutrients when compared to mineral fertilizers
[39, 40]. Thus, using vermicompost improves overall soil fertility by improving
numerous soil physical, chemical, and biological qualities.
49. Effect of vermicompost on plant growth and development
Vermicompost promotes the growth and development of a variety of plant
species, especially various horticulture crops, that is, sweet corn, tomato,
strawberry [41], cereals crop rice [27], wheat, sorghum [32], fruit crops
papaya [42], and pineapple [43]. Several growth and yield metrics viz.
stem diameter, plant height, marketable yield per plant, mean leaf
number, and total plant biomass of tomato plant were recorded
significantly higher with the application of vermicompost. The increase in
growth and development of plant is due to the improving action of
vermicompost application on soil physical, chemical, and biological
properties which ultimately improves the overall soil fertility, which
enhances the plant growth and development. Vermicompost has been
demonstrated to improve plant dry weight [44] and uptake of plant N [45]
serve as a naturally available, slow released sources of plant nutrients
50. Effect of vermicompost on bioremediation and detoxification of
industrial wastes
Vermicompost has a greater importance in bioremediation and
detoxification of industrial waste. Because of their robust metabolic system
and the participation of earthworm gut bacteria and chloragocyte cells,
earthworms have the potential to valorize and detoxification of heavy
metals in industrial by-products. The majority of research found that
vermicompost made from organic waste comprises greater concentrations
of humic chemicals, which are important for plant growth [49]. Earthworm
has a vast role in bioconversion of waste materials. Because of their robust
metabolic system and participation of varied intestinal micro biota,
enzymes, and chloragocyte cells that decrease hazardous forms to benign
forms, earthworms have the ability to bio-convert and detoxify most heavy
metals in industrial sludges
51. Effects of vermicompost on soil organic matter Earthworm casts ingested soils often have
much higher content of soil organic carbon and nutrients availability as compared to
surrounding soils (Lee, 1985). The studies undertaken by Maheswarappa, (1999) revealed
that vermicompost addition in soil enhanced organic carbon status, decreased bulk density,
improved soil porosities and water holding capacities, increased microbial populations and
dehydrogenase activity in the soils. It has been documented that organic matter content in
worm casts was about four times more than in surface soil with average values of 48.2 and
11.9 g kg-1 soil, respectively (Khang, 1994). Moreover, earthworms contribution to N
turnover in cultivated soils ranged from 3 to 60 kg ha-1 year-1 (Crossley, 1988; Bostom,
1988), thereby enhancing N availability to plants (Tiwari et al., 1989; Hullugalle and Ezumah,
1991).