| Registro completo |
| Provedor de dados: |
NWISRL
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| País: |
United Kingdom
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| Título: |
Management of irrigated agriculture to increase organic carbon storage in soils
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| Autores: |
Entry, J.A.
Sojka, R.E.
Shewmaker, G.E.
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| Data: |
2007
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| Ano: |
2007
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| Palavras-chave: |
Chemistry
Mass Import - autoclassified (may be erroneous)
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| Resumo: |
Increasing the amount of C in soils may be one method to reduce the concentration of C02 in the atmosphere. We measured organic C stored in southern Idaho soils having long term cropping histories that supported native sagebrush vegetation (N SB), irrigated moldboard plowed crops (IMP), irrigated conservation -chisel- tilled crops (ICT) and irrigated pasture systems (1?). The C02 emitted as a result of fertilizer production, farm operations and CO; lost via dissolved carbonate in irrigation water, over a 30 year period, was included. Net organic C in ecosystems decreased in the order IP>ICT>NSB>IMP. In this study, if NSB were converted to IMP, 0.15 g C m“2 would be emitted to the atmosphere, but if converted to IP , 3.56 g C m'2 could be sequestered. If IMP land were converted to ICT, 0.95 g C m"2 could be i sequestered in soil and if converted to I? 3.71 g C 111'2 could be sequestered. There are 2.6)(108 ha of land worldwide presently irrigated. If irrigated agriculture were expanded 10% and the same amount of rainfed land were converted back to native grassland, an increase of 3.4x109 Mg C (5.9% of the total C emitted in the next 30 yr) could potentially be sequestered. The total projected release of CO2 is 5.7x10‘° Mg C worldwide during the next 30 years. Converting rainfed agriculture back to native vegetation while modestly increasing areas in f irrigated agriculture could have a signi?cant impact on C0; atmospheric concentrations while maintaining or increasing food production.
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| Tipo: |
Book Section
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| Idioma: |
Inglês
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| Identificador: |
http://eprints.nwisrl.ars.usda.gov/833/7/1232.pdf
Entry, J.A. and Sojka, R.E. and Shewmaker, G.E. (2007) Management of irrigated agriculture to increase organic carbon storage in soils. In: Plattenberg, R.H., (ed.) Environmental Pollution: New Research. pp. 121-139. Nova Science Publishers, New York, NY.
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| Editor: |
Nova Science Publishers
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| Relação: |
http://eprints.nwisrl.ars.usda.gov/833/
1232
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| Formato: |
text
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