2006
DOI: 10.1080/03601230600616155
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Effect of Methamidophos and Urea Application on Microbial Communities in Soils as Determined by Microbial Biomass and Community Level Physiological Profiles

Abstract: In this study, we evaluated the effect of the application by two agrochemicals, methamidophos (O,S-dimethyl phosphoroamidothioate) and urea, on microbial diversity in soil, using the combined approaches of soil microbial biomass analysis and community level physiological profiles (CLPPs). The results showed that both a low and a high level of methamidophos application (CS2 and CS3) and urea application (CS4) significantly decreased microbial biomass C (Cmic) by 41-83% compared with the control (CS1). The soil … Show more

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Cited by 72 publications
(26 citation statements)
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“…Effect of insecticides, viz., monocrotophos, quinalphos, and cypermethrin, on microbial density in a black clay soil has been reported by Gundi et al ( 2005 ) and observed that the presence of organic matter and vegetation infl uences the pesticide toxicity to the soil microbes. By using integrated approaches of soil microbial biomass analysis and community-level physiological profi les (CLPPs), Wang et al ( 2006 ) evaluated the effect of methamidophos and urea on microbial diversity in soil and concluded that agrochemicals enhanced functional diversities of soil microbial communities and reduced microbial biomass that some bacterial species might be enriched in soils under methamidophos stress. Demanou et al ( 2006 ) investigated the effect of a combined application of copper and mefenoxam on the functional diversity of soil microbial communities determined by structural and metabolic profi ling (arbitrarily primed and RNA arbitrarily primed PCR).…”
Section: Populationmentioning
confidence: 99%
See 1 more Smart Citation
“…Effect of insecticides, viz., monocrotophos, quinalphos, and cypermethrin, on microbial density in a black clay soil has been reported by Gundi et al ( 2005 ) and observed that the presence of organic matter and vegetation infl uences the pesticide toxicity to the soil microbes. By using integrated approaches of soil microbial biomass analysis and community-level physiological profi les (CLPPs), Wang et al ( 2006 ) evaluated the effect of methamidophos and urea on microbial diversity in soil and concluded that agrochemicals enhanced functional diversities of soil microbial communities and reduced microbial biomass that some bacterial species might be enriched in soils under methamidophos stress. Demanou et al ( 2006 ) investigated the effect of a combined application of copper and mefenoxam on the functional diversity of soil microbial communities determined by structural and metabolic profi ling (arbitrarily primed and RNA arbitrarily primed PCR).…”
Section: Populationmentioning
confidence: 99%
“…The medium concentrations of methamidophos (150 mg kg −1 ) changed nif H gene diversity in fi rst week, but higher concentrations (250 mg kg −1 ) demonstrated prominent effects on nif H gene diversity in next weeks. Wang et al ( 2006 ) conducted an experiment to examine the effect of continuous input of methamidophos for 4 years on the biochemical, catabolic, and genetic characteristics of soil microbial communities through characterizing microbial biomass, PLFA profi les, and CLCPs and ARDRA patterns. They reported that high methamidophos inputs signifi cantly decreased total microbial biomass carbon (Cmic) and fungal biomass, but enhanced Gram-negative bacteria biomass and catabolic activity with no signifi cant effects on the Gram-positive bacteria.…”
Section: Populationmentioning
confidence: 99%
“…Com essas práticas de manejo são afetados o comportamento da biomassa microbiana (GHOSHAL andSINGH, 1995, ASSIS et al, 2003) e os processos de transformação bioquímica do N no solo (WANG et al, 2006), e conseqüentemente, sua disponibilidade.…”
Section: Introductionunclassified
“…However, only 0.1% of the applied pesticides reach target organisms while the remaining amount contaminates the soil (Carriger et al, 2006). Many studies have shown that pesticides adversely affect the diversity and activities of beneficial soil bacterial organisms due to their xenobiotic characteristics (Widenfalk et al, 2008;Wang et al, 2006;Niewiadomska and Klama 2004). There are also reports elucidating the ability of soil microorganisms to degrade pesticides and use the applied pesticides as a source of energy and nutrients to multiply.…”
Section: The Effect Of Pesticides and Fumigantsmentioning
confidence: 99%