Persistence of insecticides and microbiological attributes in a soil under different management systems

Ciência Rural

Mercante, Fábio Martins¹  Scorza Júnior, Rômulo Penna¹  Salton, Júlio Cesar¹  Mendes, Ieda de Carvalho²  Portilho, Irzo Isaac Rosa³ 

[1] Embrapa Agropecuária Oeste, Dourados, Brazil;Embrapa Cerrados, Planaltina, Brazil;Universidade Estadual de Mato Grosso do Sul, Dourados, Brazil

关键词: degradation;    half-life;    crop-livestock integration;    no-tillage;   

DOI  :  10.1590/0103-8478cr20131328

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

The aim of this research was to evaluate the degradation of bifenthrin, permethrin and thiamethoxam insecticides in a soil under crop-livestock integration (CLIS), no-tillage (NTS) and conventional (CS) systems and its relationship with microbiological attributes (microbial biomass C, basal soil respiration and activities of β-glucosidase and acid phosphatase). The experiment was carried out using incubated soil (0-10cm) with moisture content about 75% of field capacity at 28ºC for 51 days. Besides the increase in soil organic matter content, biomass and microbial activity, CLIS system also favored a faster degradation of the three insecticides in soil compared to the others. Among the evaluated insecticides, thiamethoxam showed the slowest degradation in soil with half-life (DT50) values between 46 and 89 days. Bifenthrin DT50 values were between 14 and 44 days and for permethrin between 9 and 47 days

【 授权许可】

Unknown