【摘要】 本文采用田间实验方法,研究了植物源农药博落回杀菌剂在露地不结球白菜(俗称小白菜,Brassica rapa L.Chinensis Grou)及土壤中的残留量变化,为其在无公害农产品的生产方面提供参考。结果显示:分别以浓度750 g/hm2、1 500 g/hm2的博落回杀菌剂处理露地小白菜,其在露地小白菜中的残留降解动态变化表现为前5 d降解较快,15 d以后基本无残留;而在土壤中的残留降解动态变化则表现为前7 d降解缓慢,7 d后降解速度则大大加快,32 d以后基本无残留;其农药残留半衰期分别为1.83 d和8.37 d,且最后残留量都低于我国对植物源农药的残留最大允许限量0.500 0 mg/kg。因此,博落回在露地小白菜及土壤中属易降解、低残留、安全性较高的植物源农药,适合在农业生产方面推广使用。更多还原

【Abstract】 In order to provide a theoretical basis for the use of Macleaya fungicide to produce green vegetable,a field experiment was carried out to reveal the dynamics of Macleaya fungicide residue in pakchoi and soil.The results showed that spaying of 750 or 1500g/hm2 Macleaya fungicide solution to pakchoi,Macleaya fungicide in pakchoi degraded quickly in the first 5 days and nearly degraded totally after 15 days;while Macleaya fungicide in soil degraded slowly in the first 7 days,then the degradation rate was accelerated,after there was no Macleaya fungicide residue in soil after 32 days.The residual half-life of Macleaya fungicide were 1.83d and 8.37d in pakchoi and soil,and the finally residues of Macleaya fungicide in pakchoi and soil were less than the MRL values 0.500 0 mg/kg.The results implied that Macleaya belong to easily degradable,non-polluting,high security plant source pesticides,which was suitable for widespread in agricultural production.更多还原