Data/hora: 12/06/2024 12:12:01

Provedor de dados: | 18
País: | United Kingdom
Título: | Management of irrigated agriculture to increase organic carbon storage in soils
Autores: | Entry, J.A.; Sojka, R.E.; Shewmaker, G.E.
Data: | 2007
Ano: | 2007
Palavras-chave: | Chemistry; Mass Import - autoclassified (may be erroneous).
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&gt;ICT&gt;NSB&gt;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.
Tipo: | Book Section
Idioma: | Inglês

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.

Editor: | Nova Science Publishers

Relação:

http://eprints.nwisrl.ars.usda.gov/833/

1232

Formato: | text