TY - JOUR
T1 - Effect of pest controlling neem (Azadirachta indica A. Juss) and mata-raton (Gliricidia sepium Jacquin) leaf extracts on emission of green house gases and inorganic-N content in urea-amended soil
AU - Méndez-Bautista, Joaquín
AU - Fernández-Luqueño, Fabián
AU - López-Valdez, Fernando
AU - Mendoza-Cristino, Reyna
AU - Montes-Molina, Joaquín A.
AU - Gutierrez-Miceli, F. A.
AU - Dendooven, L.
N1 - Funding Information:
The research was funded by the Department of Biotechnology and Bioengineering Cinvestav and SEMARNAT project 2004-C01-124 (México). F.F.-L. and F.L.-V. received Grant-aided support from ‘Consejo Nacional de Ciencia y Tecnología (CONACyT)’ while J.M.-B. from ‘Sistema Nacional de Investigadores (SNI)’ México.
PY - 2009/7
Y1 - 2009/7
N2 - Extracts of neem (Azadirachta indica A. Juss.) and Gliricidia sepium Jacquin, locally known as 'mata-raton', are used to control pests of maize. Their application, however, is known to affect soil microorganisms. We investigated if these extracts affected emissions of methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2O), important greenhouse gases, and dynamics of soil inorganic N. Soil was treated with extracts of neem, mata-raton or lambda-cyhalothrin, used as chemical control. The soil was amended with or without urea and incubated at 40% and 100% water holding capacity (WHC). Concentrations of ammonium (NH4+), nitrite (NO2-) and nitrate (NO3-) and emissions of CH4, CO2 and N2O were monitored for 7 d. Treating urea-amended soil with extracts of neem, mata-raton or lambda-cyhalothrin reduced the emission of CO2 significantly compared to the untreated soil with the largest decrease found in the latter. Oxidation of CH4 was inhibited by extracts of neem in the unamended soil, and by neem, mata-raton and lambda-cyhalothrin in the urea-amended soil compared to the untreated soil. Neem, mata-raton and lambda-cyhalothrin reduced the N2O emission from the unamended soil incubated at 40%WHC compared to the untreated soil. Extracts of neem, mata-raton and lambda-cyhalothrin had no significant effect on dynamics of NH4+, NO2- and NO3-. It was found that emission of CO2 and oxidation of CH4 was inhibited in the urea-amended soil treated with extracts of neem, mata-raton and lambda-cyhalothrin, but ammonification, N2O emission and nitrification were not affected.
AB - Extracts of neem (Azadirachta indica A. Juss.) and Gliricidia sepium Jacquin, locally known as 'mata-raton', are used to control pests of maize. Their application, however, is known to affect soil microorganisms. We investigated if these extracts affected emissions of methane (CH4), carbon dioxide (CO2) and nitrous oxide (N2O), important greenhouse gases, and dynamics of soil inorganic N. Soil was treated with extracts of neem, mata-raton or lambda-cyhalothrin, used as chemical control. The soil was amended with or without urea and incubated at 40% and 100% water holding capacity (WHC). Concentrations of ammonium (NH4+), nitrite (NO2-) and nitrate (NO3-) and emissions of CH4, CO2 and N2O were monitored for 7 d. Treating urea-amended soil with extracts of neem, mata-raton or lambda-cyhalothrin reduced the emission of CO2 significantly compared to the untreated soil with the largest decrease found in the latter. Oxidation of CH4 was inhibited by extracts of neem in the unamended soil, and by neem, mata-raton and lambda-cyhalothrin in the urea-amended soil compared to the untreated soil. Neem, mata-raton and lambda-cyhalothrin reduced the N2O emission from the unamended soil incubated at 40%WHC compared to the untreated soil. Extracts of neem, mata-raton and lambda-cyhalothrin had no significant effect on dynamics of NH4+, NO2- and NO3-. It was found that emission of CO2 and oxidation of CH4 was inhibited in the urea-amended soil treated with extracts of neem, mata-raton and lambda-cyhalothrin, but ammonification, N2O emission and nitrification were not affected.
KW - Bioinsecticide
KW - Dynamics of C and inorganic N
KW - Lambda-cyhalothrin
KW - Soil water content
UR - http://www.scopus.com/inward/record.url?scp=67349227829&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2009.04.007
DO - 10.1016/j.chemosphere.2009.04.007
M3 - Artículo
SN - 0045-6535
VL - 76
SP - 293
EP - 299
JO - Chemosphere
JF - Chemosphere
IS - 3
ER -