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  Simulated effects of dryland cropping intensification on soil organic matter and greenhouse gas exchanges using the DAYCENT ecosystem model

Del Grosso, S., Ojima, D., Parton, W., Mosier, A., Peterson, G., & Schimel, D. (2002). Simulated effects of dryland cropping intensification on soil organic matter and greenhouse gas exchanges using the DAYCENT ecosystem model. Environmental Pollution, 116, S75-S83.

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BGC0457.pdf (Publisher version), 178KB
 
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Del Grosso, S., Author
Ojima, D., Author
Parton, W., Author
Mosier, A., Author
Peterson, G., Author
Schimel, D.1, Author           
Affiliations:
1Department Biogeochemical Systems, Prof. D. Schimel, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497754              

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Free keywords: C sequestration; greenhouse gases; land use; modeling; DAYCENT Colorado shortgrass steppe; fallow tillage management; land-use change; carbon sequestration; wheat-fallow; methane oxidation; nitric-oxide; emissions; nitrogen; agriculture
 Abstract: We present evidence to show that DAYCENT can reliably simulate soil C levels, crop yields, and annual trace gas fluxes for various soils. DAYCENT was applied to compare the net greenhouse gas fluxes for soils under different land uses. To calculate net greenhouse gas flux we accounted for changes in soil organic C, the C equivalents of N2O emissions and CH4 uptake, and the CO2 costs of N fertilizer production. Model results and data show that dryland soils that are depleted of C due to conventional till winter wheat/fallow cropping can store C upon conversion to no till, by reducing the fallow period, or by reversion to native vegetation. However, model results suggest that dryland agricultural soils will still be net sources of greenhouse gases although the magnitude of the source can be significantly reduced and yields can be increased upon conversion to no till annual cropping. (C) 2001 Elsevier Science Ltd. All rights reserved.

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 Dates: 2002
 Publication Status: Issued
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 Identifiers: Other: BGC0457
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Title: Environmental Pollution
Source Genre: Journal
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Publ. Info: England : Elsevier
Pages: - Volume / Issue: 116 Sequence Number: - Start / End Page: S75 - S83 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/954925501170
ISSN: 0269-7491