Presentazione di PowerPoint

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Dipartimento Agronomia Ambientale e Produzioni
VegetaliUniversità degli Studi di Padova - ITALY
Contribution of soil to CO2 balance in industrial
oilcrops production. Stefano BONA, Giuliano
MOSCA, Lara RIELLO and Teofilo
VAMERALI Research supported by PROBIO Project
MiPAF TISEN Project MiPAF
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OBJECTIVES

• CO2 balance for oilcrops production
• Modeling organic matter in soil
• Finding input level for maximum CO2 storage

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• Simulations carried out with a model (DiSOS) of
  CO2 evolution from soils applied to sunflower and
  rapeseed as a function of soil tillage input
  (Variable Xsoil).
• The model was used to simulate the soil organic
  carbon evolution from 400 cultivations of
  rapeseed and sunflower from a SURVEY made in the
  Veneto Region (Po valley northern Italy).

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CO2

• Not only CO2 in products
• (oil and cake)
• but also CO2 stored in
• PLANTS AND SOILS

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Winter rapeseed CO2 storage
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CO2 in soils

• 30 cm of soil with 2 of O.M.
• 70000 kg per hectar
• Variations are very little if compared with the
  amount of O.M.

• BUT THEY CUMULATE

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SUNFLOWER - Net CO2 storage Kgha-1as function
of CO2 emission
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CO2 storage as function of energy input
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Efficiency of CO2 storage as function of
agricultural input kg(CO2)GJ-1
Kg of CO2 fixed per GJ used as agricultural input
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Efficiency of CO2 storage kg(CO2)GJ-1 as
function of agricultural input
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Efficiency of CO2 storage kg(CO2)GJ-1 as
function of agricultural input
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Xsoil soil tillage input coefficient
intensity of tillage
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Xsoil soil tillage input coefficient
intensity of tillage
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CO2 balance in soil
Rapeseed Lowest yield for CO2 storage in soil
2647 kgha-1
Average yield in the survey 2665 kgha-1
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CO2 balance in soil
Sunflower Lowest yield for CO2 storage in soil
2666 kgha-1
Average yield in the survey 2693
kgha-1
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CO2 balance in soilFOR BOTH CROPS
Lowest yield for CO2 storage in soil
Average yield in the survey
lt
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CO2 balance in soil

• Rapeseed
• 51 farms
• Sunflower
• 58 farms

CO2 STORAGE
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CO2 balance in soil
Positive conclusion More than 50 of farms
stores CO2
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CO2 balance in soil
Negative conclusion
Almost 50 of farms DOES NOT store CO2
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SUNFLOWER
1. Almost no responses to increase in
agricultural input2. High tolerance to
reduction of agricultural input 3. Most
farms store CO2
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RAPESEED

• Higher input per hectar
• (LITTLE) Positive reaction to intensive
  managements
• 3. Almost 50 of farms does not store CO2

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CONCLUSIONS

• For both crops the efficiency of CO2 storage is
  higher with low inputs.
• The average yield in our environment (sunflower
  and rapeseed) gives CO2 storage.
• For near 1 half of the fields the soil balance is
  negative.

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Thank you for your attention!