苹果树叶与白三叶叶内毒死蜱残留研究  

Chlorpyrifos remain in leaves of the apple trees and the white clover

作　　者：陈家武[1] 曹社会[1] 金山[1] 张娜[1] 郑尧[1] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100

出　　处：《草业科学》2011年第4期693-696,共4页Pratacultural Science

基　　金：科技部支撑项目(2007BAK31B01-02B)

摘　　要：为了保证畜禽的饲喂安全,测定苹果(Malus pumila)树树叶和白三叶(Trifolium repens)叶内农药含量是否超标,本研究采用气相色谱法,在西北农林科技大学苹果园内取样检测。结果表明,常规剂量时,毒死蜱在苹果树叶内的半衰期是1.8 d,白三叶叶内为2.2 d,2倍剂量时苹果树叶内为1.8 d,而白三叶叶内为3.4 d;不同时间间隔,对照组围绕着0.5 mg/kg小范围波动;试验组中,苹果树叶及白三叶植株内的毒死蜱前期降解速度快,后期逐渐减缓;喷施毒死蜱后,苹果树叶内毒死蜱含量低于白三叶植株,常规剂量相同样品低于2倍剂量样品内毒死蜱含量。第21天苹果树和白三叶叶内毒死蜱残留量高于国家及欧盟等对食品中毒死蜱的最大残留量标准,作为饲料饲喂畜禽存在潜在危险。To guarantee the feeding security of livestock and poultry,the amount of chlorpyrifos remain in leaves of apple trees and white clover collected from the garden of Northwest AF University was measured by gas chromatography（GC）.This study showed that the half-life periods of chlorpyrifos in leaves of apple trees and the clover were 1.8 d and 2.2 d respectively when the normal concentration of chlorpyrifos was sprayed,and they were 1.8 d and 3.4 d when the double concentration of chlorpyrifos was sprayed.The adjustable scope of chlorpyrifos concentration of leaves in CK treatment was 0.5 mg/kg,however,the chlorpyrifos concentration in leaves sprayed by chlorpyrifos showed a fast degradation in the earlier stage and then showed a slow degradation in the later stage.The remains in the apple leaves was lower than that in the white clover when the tow kind leaves were sprayed by chlorpyrifos,indicating that the chlorpyrifos concentration in leaves of apple trees sprayed by the normal concentration was lower than that in the white clover sprayed by double normal concentration.On the 21std,the chlorpyrifos remain was higher than remain standard presented by Chinese government and EU when chlorpyrifos was sprayed,at this time,the leaves of apple trees and white clover was dangerous to livestock and poultry due to high chlorpyrifos remain.

关 键 词：农药残留 安全 毒死蜱 气相色谱 

分 类 号：S481.8[农业科学—农药学]