南宁市蔬菜地土壤有机磷农药残留状况调查研究

Study on Survey Pesticide Residues of OPs Vegetable Soil in Nanning

[目的]调查南宁市及周边县区蔬菜地土壤有机磷农药残留状况,为南宁市蔬菜安全生产提供指导。[方法]采用均匀布点法采集土壤样品;前处理参照GB/T14552-2003;采用铝盒法测定土壤样品水分含量;用PHS-25型pH计酸度计测定土壤pH;在GC4000型气相色谱仪上用毛细管柱程序升温法测定土壤有机磷农药残留状况。[结果]74个样点中未检出农残样点17个,检出农残样点57个,检出率为77.03%,土壤水分平均含量为20.86%,最低10.44%,最高48.88%,土壤平均pH为6.59,最低4.63,最高8.06。[结论]南宁市及周边县区蔬菜地土壤中有机磷农残检出率达77.03%,相对较高,土壤水分平均含量为20.86%,土壤pH平均为6.59,与土壤中农药残留含量均无直接相关。

[ Objective ] This research surveyed pesticide residues of OPs vegetable soil in Nanning, it provides guidance for safety production of vegetables in Nanning. [ Method] The research used method of uniform putting to collect samples of soil. Pretreatment consulted GB/T14552- 2003. It used method of aluminum box to detect moisture content of soil samples, and used model PHS-25 pH meter to detect pH of soil samples. It used method of temperature programming to detect content of residues of OPs on model GC400 GC. [ Result] 17 samples hadn＇t residues and 57 samples had. The relevance ratio was 77.03%. Average moisture content was 20.86%, the lowest moisture content was 10.44%, and the highest moisture content was 48.88%. Average pH was 6.59, the lowest pH was 4.63, and the highest was 8.03. [ Conclusion] The relevance ratio of soil of vegetables was 77.03% in Nanning. Average moisture content was 20.86% , and average pH was 6.59, these hadn＇t related with residue.