Pesticide effects on microbial population and soil enzyme activities during vermicomposting of agricultural waste.
J Environ Biol
; 25(2): 201-8, 2004 Apr.
Article
em En
| MEDLINE
| ID: mdl-15529880
ABSTRACT
The effects of different pesticides (propiconazole, profenofos, pretilachlor) on vermicomposting were evaluated for the adverse effects on soil enzyme activities (dehydrogenase, phosphatase, urease) and total microbial counts (TMC). There were remarkable increase in enzyme activities and TMC in presence of earthworm compared to control (earthworm absent). In comparison to control, the activities of phosphatase, dehydrogenase and urease in presence of vermicompost increased upto 30, 128 and 31.3% respectively; whereas increase of TMC was 71.9%. But, in presence of each of the pesticide, said activities decreased. Maximum inhibition of soil phosphatase activity (46.6%) was observed in presence of propiconazole (100 mg kg(-1)) after 120 days. Profenofos affected the soil dehydrogenase activity in the tune of 47% at 1000 mg kg(-1) concentration after 80 days and thereafter, the extent of toxicity decreased little. Soil urease activity was affected markedly in presence of profenofos and was 62% at 1000 mg kg(-1) level after 80 days. TMC also declined in presence of profenofos and pretilachlor. Increase in TMC was about 71.9% compared to control and the inhibition was more or less 60% when profenofos (1000 mg kg(-1)) was present even after 120 days of treatment.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Praguicidas
/
Microbiologia do Solo
/
Poluentes do Solo
/
Eliminação de Resíduos
Idioma:
En
Revista:
J Environ Biol
Ano de publicação:
2004
Tipo de documento:
Article
País de afiliação:
Índia