Authors: A MontoyaGonzález O E GonzálezNavarro B Govaerts K D Sayre I Estrada M LunaGuido J A CejaNavarro L PatiñoZúñiga R Marsch L Dendooven
Publish Date: 2009/04/04
Volume: 325, Issue: 1-2, Pages: 243-253
Abstract
Straw incorporation crop rotation and organic fertilizer applications have been proposed to counter the negative effects of straw burning inorganic N fertilizer application and intensive agriculture practices for wheat production in the state of Sonora México A laboratory study was done to investigate how these alternative agriculture practices applied for 9 years affected carbon dioxide CO2 nitrous oxide N2O and nitrogen N2 emissions and inorganic N in soil Emission of CO2 decreased 12 times in soil burned compared to soil where residue was incorporated but emissions of N2 increased 41 times and the increase in inorganic N or the N mineralization rate 14 times Including Sesbania spp in the crop rotation reduced N mineralization rate 12 times when residue was burned but increased it 15 times when it was incorporated compared to clean fallow or the cultivation of maize Fertilizing soil with urea increased the N mineralization rate 49 times and the N2O emission 2 times while chicken manure increased it 114 times and 37 times respectively compared to the unamended soil when residue was burned It was found that burning of crop residue increased N mineralization and N2 emissions but decreased microbial activity Addition of chicken manure increased emissions of N2O and CO2 and concentrations of NO 3 − We thank JM CeballosRamirez for technical assistance The experimental work was funded by Cinvestav México and the ‘Instituto Tecnólogico de Sonora’ ITSON México while the field experiment by CIMMYT and its strategic donors A MG received grantaided support from Mexican Academy of Science 2007 and J CN and L PZ from ‘Consejo Nacional de Ciencia y Tecnología’ CONACyT México
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