Abstract: Twenty-seven plots of commercial bamboo forest in 4 counties of Zhejiang Province were chosen, and soil samples were collected to investigate the residual of organic pesticides. Organochlorine pesticides including HCH, DDT, chlorothalonil, pentachlornitrobenzene and dicofol, organophosphorus pesticides including parathion, parathionmethyl, methamidaphos and dimethoate, and pyrethroid including cypermethrin and esfenvalerate were detected. The detection rate of HCH, DDT, parathionmethyl, cypermethrin and esfenvalerate was 100%, 70.37%, 96.30%, 18.52% and 62.90%, respectively. The concentrations of test organic pesticides were below 150 μg·kg^-1, except esfenvalerate with the concentration of 1 227.14 μg·kg^-1. All the detections suggested that in the commercial bamboo forest soils in Zhejiang, organic pesticides pollution was ubiquitous, and the residual of organochlorine and organophosphorus pesticides was lower than that of pyrethroid. In addition, the management type and level of bamboo forests and the ways of landuse affected the organic pesticides pollution in some extent. The residual of the pesticides was higher in the soils under intensive management bamboo forests, shoot-used bamboo forests, and bamboo forests converted from cropland than in those under extensive management bamboo forests, Phyllostachys pubescens shoot-timber-used forests, and bamboo forests established on mountains, respectively.

Key words: Extensive grazing, Designed feeding, Eating-full, Eating-well, Legume forage