Data/hora: 12/06/2024 02:02:07

Provedor de dados: | 18
País: | United Kingdom
Título: | Management of irrigated agriculture to increase carbon storage
Autores: | Sojka, R.E.; Entry, J.A.; Shewmaker, G.E.; Fuhrmann, J.J.
Data: | 2007
Ano: | 2007
Palavras-chave: | Mass Import - unclassified.
Resumo: | Fossil fuel burning at the present rate, will double atmospheric carbon dioxide (CO 2 ) in this  century, raising air temperature 1.5 to 5 °C. Sequestering carbon (C) in soil can reduce  atmospheric CO2 concentration. We measured inorganic and organic C in southern Idaho  soils having long term land use histories of native sagebrush vegetation (NSB), irrigated  moldboard plowed crops (IMP), irrigated conservation- (chisel) tilled crops (ICT) and  irrigated pasture systems (IP). Soil Organic C (SOC) decreased in the order  IP&gt;ICT&gt;NSB&gt;IMP. We used our findings to estimate potential amounts of organic C  sequestered if irrigated agriculture expanded. If irrigated agricultural land was expanded  by10°/0 worldwide and NSB was converted to ICT, 2.5 x 10 9 Mg organic C (4.38 °A of the  total C emitted in the next 30 yr) could potentially be sequestered in soil. If irrigated  agricultural land were expanded by 10% worldwide and NSB were converted to IP, a possible  9.3 x 109 Mg organic C (16.32 % of the total C emitted in the next 30 yr) could be sequestered  in soil. Irrigated agriculture produces twice the yield compared to non-irrigated land.  Irrigation increases soil C relative to native semi arid or arid sites. Since irrigated agriculture  produces higher yields, less land area needs to be put into production compared to rainfed  agriculture. Altering land use to produce crops on high output irrigated agriculture, while  returning less-productive rainfed agricultural land to temperate forest or native grassland,  could further reduce atmospheric CO2 . Inorganic carbon increases with irrigation were less  consistent and much smaller than SOC. Irrigating these soils also increased microbial  biomass and changed microbial diversity.
Tipo: | Conference or Workshop Item
Idioma: | Inglês

Identificador:

http://eprints.nwisrl.ars.usda.gov/857/1/1225.pdf

Sojka, R.E. and Entry, J.A. and Shewmaker, G.E. and Fuhrmann, J.J.  (2007) Management of irrigated agriculture to increase carbon storage.  pp. 189-202.  In: Currie, L.D. and Yates, L.J. (eds.) Proceedings of the Fertilizer & Lime Research Centre Workshop. Designing Sustainable Farms: Critical Aspects of Soil and Water Management.    New Zealand-Palmerston North, 2007/02/08-09.

Relação:

http://eprints.nwisrl.ars.usda.gov/857/

1225

Formato: | application/pdf