安徽某草莓基地土壤中农药残留特征及风险评价

Characteristics and risk assessment of pesticide residues in soil of a strawberry base in Anhui province

中文关键词:  草莓  土壤  农药残留  风险评估

英文关键词:strawberry  soil  pesticide residues  risk assessment

中文摘要:

      目的 调查安徽某草莓基地土壤中的农药残留状况, 评估其农药残留风险。方法 采用超高效液相色谱-串联质谱法和气相色谱-串联质谱法, 对采集的205份土壤样品中的农药残留进行检测分析, 并用环境标准值计算法评估草莓基地农药残留风险。结果 该地区205份土壤样品中有179份样品检出农药残留, 检出率87.31%; 有29种农药被检出, 其中检出频率较多的是咯菌腈、腐霉利和苯醚甲环唑3种杀菌剂, 检出率分别为83.90%、87.32%、87.32%, 对土壤质量及种植作物安全构成一定危害风险。对于表层土(0~20 cm)范围, 其浅表层土(0~10 cm)与深表层土(10~20 cm)中的农药残留存在差异, 大部分浅表层土中的农药残留浓度高于深表层土。结论 该草莓基地由于杀菌剂等农药的长期使用, 对土壤质量安全构成风险隐患, 需要对高风险农药加强关注。

英文摘要:

      Objective To investigate the status of pesticide residues in soil of a strawberry base in Anhui province and evaluate the risk of pesticide residues. Methods The pesticide residues in the collected 205 soil samples were detected and analyzed by ultra performance liquid chromatography-tandem mass spectrometry and gas chromatography-tandem mass spectrometry. The risk of pesticide residues in strawberry base was evaluated and calculated by environmental standard value method. Results Pesticide residues were detected in 179 samples out of 205 soil samples in the region, with a detection rate of 87.31%. There were 29 kinds of pesticides detected, and the most detected fungicides were fludioxonil, profundyl and difenecycloazole, with detection rates of 83.90%, 87.32% and 87.32%, respectively, which posed a certain risk to soil quality and safety and planting crops. For the range of surface soil (0?20 cm), the pesticide residues in the shallow surface soil (0?10 cm) and deep surface soil (10?20 cm) were also different, and the pesticide residue concentration in the most of the shallow surface soil was higher than that in the deep surface soil. Conclusion Due to the long-term use of pesticides such as fungicides, the strawberry base poses hidden risks to soil quality and safety, and it is necessary to pay more attention to high-risk pesticides.