Systems of agricultural
production
- global changes of climate
Chojnicki J., Dmuchowski W., Lenart S., Sosulski T.

Warsaw...
Annual GHG emissions from agriculture are expected to
increase in the coming decades due to escalating
demands for food an...
Agricultural practices that potentially mitigate
GHGs:
•
•
•
•
•
•
•

cropland management;
grazing land management/pasture...
Influence of crop production
on climate change
Main processes:
 Strengthening of warming – emission of N2O (GHG)
N2O is g...
Emission of N2O in Poland in 2011
(KOBIZE, 2013)

Sources

Gg

%

Total

87.9

100

Energy production

6.8

8.7

Industria...
Properties of greenhouse gases
Gas

Life duration
in air / years

Strengthening of
warming

CO2

50-200

1

CH4

12

43

N...
Concentration of GHGs in the troposphere
Gas

Before 1750

Now

part in
warming

(Start of industrial
revolution)

CO2

28...
Productivity and environmental impact of
different farming systems
High-input
farming system

Productivity

Precision
agri...
Agricultural land on certified organic and
integrated farms in Poland in 2011
Farms

Agricultural land
in thousand ha

%

...
Emission of N2O (kg ha-1) in different crop
production systems within 1996-2005
(Stalenga & Kawalec 2007)

Source of emiss...
Nitrogen balance in different farming
systems in kg N/ha (Jończyk et al. 2007)
Farming system

Input

Output

Balance

Org...
Nitrogen losses from soil in various fertilization
systems of rye monoculture (calculated using the
balance method)
0

Min...
Effect of mineral, mineral-organic and organic
fertilization on N2O emissions from soil under rye
monoculture (monthly ave...
Conclusions
• Crop production has significant influence on GHG emission
(N2O) in Poland (87% total emission) and is correl...
• The level of organic carbon sequestration in soil depends
on the system of agriculture production: ecological >
inegrate...
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Systems of agricultural production 
- global changes of climate


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This presentation focuses on agricultural practices that potentially mitigate climate change, the influence of crop production on climate change and conclusions that can be drawn.

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Systems of agricultural production 
- global changes of climate


  1. 1. Systems of agricultural production - global changes of climate Chojnicki J., Dmuchowski W., Lenart S., Sosulski T. Warsaw University of Life Sciences, 02-776 Warszawa, 159/37 Nowoursynowska Street , Poland, email: jozef_chojnicki@sggw.pl Global Landscapes Forum Warsaw, 16-17 November 2013
  2. 2. Annual GHG emissions from agriculture are expected to increase in the coming decades due to escalating demands for food and shifts in diet. However, improved management practices and emerging technologies may permit a reduction in emissions per unit of food (or of protein) produced.
  3. 3. Agricultural practices that potentially mitigate GHGs: • • • • • • • cropland management; grazing land management/pasture improvement; management of agricultural organic soils; restoration of degraded lands; livestock management; manure/bio-solid management; bio-energy production.
  4. 4. Influence of crop production on climate change Main processes:  Strengthening of warming – emission of N2O (GHG) N2O is generated by the microbial transformation of nitrogen in soils and manures and is often enhanced when available nitrogen exceeds plant requirements, especially under wet conditions  Reduction of warming – carbon sequestration in soil
  5. 5. Emission of N2O in Poland in 2011 (KOBIZE, 2013) Sources Gg % Total 87.9 100 Energy production 6.8 8.7 Industrial processes 3.5 4.0 Sewage 3.6 4.1 Agriculture 73.6 83.7
  6. 6. Properties of greenhouse gases Gas Life duration in air / years Strengthening of warming CO2 50-200 1 CH4 12 43 N2O 115 250 CFC-11 45 15 000 CFC-12 102 19 000 HCFC-22 12 13 000
  7. 7. Concentration of GHGs in the troposphere Gas Before 1750 Now part in warming (Start of industrial revolution) CO2 280 ppmv 378 ppmv 1.46 CH4 0.70 ppmv 1.78 ppmv 0.48 N2O 0.27 ppmv 0.32 ppmv 0.18 O3 0.025 ppmv 0.034 ppmv 0.35 CFC, HCFC, HFC 0 pptv 3-544 pptv 0.34
  8. 8. Productivity and environmental impact of different farming systems High-input farming system Productivity Precision agriculture Integrated system Low-input farming system Organic system Favourable impact on environment
  9. 9. Agricultural land on certified organic and integrated farms in Poland in 2011 Farms Agricultural land in thousand ha % Total 15442.4 100 organic 605.5 3.9 integrated 10.7 0.1
  10. 10. Emission of N2O (kg ha-1) in different crop production systems within 1996-2005 (Stalenga & Kawalec 2007) Source of emission ORG CON INT N synthetic fertilizer - 1.78 0.89 Organic fertilizer 0.32 - 0.40 N-fixing crop 0.20 - 0.14 total 0.52 1.78 1.43 ORG – organic; CON – conventional; INT - integrated
  11. 11. Nitrogen balance in different farming systems in kg N/ha (Jończyk et al. 2007) Farming system Input Output Balance Organic 95 85 11 Integrated 147 112 36 Conventional 167 119 49 Wheat monoculture 192 121 71
  12. 12. Nitrogen losses from soil in various fertilization systems of rye monoculture (calculated using the balance method) 0 Mineral-organic system Organic system 50% Mineral system 57% 20 kg·ha-1 40 35% 60 80 NPK NPK + manure Manure Sosulski 2005, Department of Agricultural Chemistry, SGGW
  13. 13. Effect of mineral, mineral-organic and organic fertilization on N2O emissions from soil under rye monoculture (monthly average) 16 (g N-N 2 O·ha -1 ·day -1 ) 12 NPK 8 NPK+manure manure 4 0 August September October unpublished data, Sosulski T., Department of Agricultural Chemistry, SGGW
  14. 14. Conclusions • Crop production has significant influence on GHG emission (N2O) in Poland (87% total emission) and is correlated with the usage of mineral N fertilizers • The level of nitrogen release depends on the applied agricultural system: ecological < inegrated < conventional < conventional – monoculture • Manure fertilization increases N2O emission more significantly than mineral fertilization
  15. 15. • The level of organic carbon sequestration in soil depends on the system of agriculture production: ecological > inegrated > conventional > conventional – monoculture • Ecological farming is most favourable in mitigation of climate changes; however, its influence is insignificant due to the small area covered by such farming • Technologies applied in integrated and precision agriculture will potentially have the largest influence on mitigation of climate change

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