International Symposium 2013 ISHS. Organic matter and carbon sequestration
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share

International Symposium 2013 ISHS. Organic matter and carbon sequestration

  • 553 views
Uploaded on

Presentation of the

Presentation of the

More in: Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
553
On Slideshare
553
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
2
Comments
0
Likes
0

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide
  • {}

Transcript

  • 1.  Importance of Soil Organic Matter in  Carbon Sequestration Jan Van Wambeke Jan.VanWambeke@fao.org Pilar Román Pilar.Roman@fao.org
  • 2. FAO is concerned with the effect of agriculture on climate change, the impact of climate change on agriculture and with the role that agriculture can play in mitigating climate change. Historically, land-use conversion and soil cultivation have been an important source of greenhouse gases to the atmosphere. It is estimated that they are responsible for about 30% of GHG emissions
  • 3. The challenges for agriculture HIGHER AND DIVERSIFIED FOOD CONSUMPTION WATER SUSTAINABILITY FOR FUTURE GENERATIONS LAND CLIMATE CHANGE Irregular water availability, extreme weather events, higher normal temperatures GENETIC RESOURCES GROWING WORLD POPULATION 3
  • 4. Carbon sequestration: the process of removing carbon from the atmosphere or preventing its release altogether by guarding it in a reservoir. Agricultural soils are among the planet’s largest reservoirs of carbon. It is estimated that soils can sequester around 20 Pg C in 25 years, more than 10 % of the anthropogenic emissions Source: CGIAR
  • 5. The quantity of carbon stored in soils is highly significant; soils contain about 3 times more carbon than vegetation and twice as much as that which is present in the atmosphere Source: FAO Carbon storage in soils is the balance between the input of dead plant material (leaf and root litter) and losses from decomposition and mineralization processes (heterotrophic respiration). Under aerobic conditions, most of the carbon entering the soil is labile, and therefore respired back to the atmosphere through the process known as soil respiration or soil CO2 efflux.
  • 6. “The importance of these activities is that any action taken to sequester carbon in biomass and soils will generally increase the organic matter content of soils, which in turn will have a positive impact on environmental, agricultural and biodiversity aspects of ecosystems. The consequences of an increase in soil carbon storage can include increases in soil fertility, land productivity for food production and security, and prevention of land degradation” Source: FAO
  • 7. Soil carbon sequestration presents both advantages and disadvantages as a means of mitigating climate change. •Advantages – Relatively low-cost – It can be readily implemented – it provides multiple associated benefits as the resultant increase in root biomass and soil organic matter enhances water and nutrient retention, availability and plant uptake and hence land productivity •Disadvantages – It is reversible, changes in agricultural management practices or disasters as fires, droughts or pests can accelerate or reverse the degree of sequestration in a relatively short time frame.
  • 8. FAO material on Carbon Sequestration