河北省紫花苜蓿农药残留状况调查与分析

Investigation and Analysis of Pesticide Residues in Alfalfa in Hebei Province

了解河北省紫花苜蓿收获期农药残留状况,有助于指导紫花苜蓿生产上合理用药,保障草产品质量安全。以2019年取自河北省献县、黄骅市、衡水市三地不同茬次收获期的紫花苜蓿鲜草为试验材料,共15个批次的样本,分别采用气相色谱-质谱法、液相色谱-串联质谱法和气相色谱法对种植过程中使用的9种杀虫剂进行了农药残留检测。结果表明:15个批次的紫花苜蓿鲜草样本中,只有1个批次检测到了较高的氧化乐果残留,1个批次检测到了低于GB 2763-2019蔬菜中农药残留限量标准的联苯菊酯残留,其他13个批次均未检测到生产中使用的相应农药品种残留,样品农药残留合格率为93.3%。河北省紫花苜蓿收获期草产品质量总体安全。针对检测结果和相关问题,就如何保障和提高河北省草产品质量提出了建议。

Understanding the pesticide residue status of alfalfa during the harvest period in Hebei Province will help to guide reasonable use of pesticides and ensure the quality safety of alfalfa products.Taking 15 batches of fresh alfalfa at different harvest times in Xianxian County,Huanghua City and Hengshui City of Hebei Province in 2019 as the survey objects,9 types of pesticides which were used during planting period were measured by the methods of gas chromatography-mass spectrometry,liquid chromatography-tandem mass spectrometry and gas chromatography.The results showed that only a certain amount of omethoate and bifenthrin residues were detected in alfalfa samples from the first harvest of Huanghua City and the second harvest of Xianxian County respectively,and none of the other 13 batches of alfalfa samples were detected.In short,the quality of alfalfa products at harvest times was generally safe in Hebei Province.According to the test results and related issues,the suggestions were given on how to guarantee and improve the quality of grass products in Hebei Province.