2018-2019年安新县北喇喇地涉重企业周边农田土壤重金属农药小麦籽粒中重金属含量调查及2021年大田原位钝化试验结果

课题组自2018年10月至2019年6月先后3次对安新县北喇喇地村涉重企业周边约13.3 hm2（210亩）农田土壤进行实地调查和布点采样。2018年10月，依据《农田土壤环境质量监测技术规范》（NY/T 395-2012），采用网格布点法（50 m×50 m）对研究区农田土壤进行系统性采样，调查总面积约13.3 hm2（210亩）。利用五点采样法采集0-20 cm 表层土壤样品，等量混合后用四分法取约1 kg 装入聚乙烯密封袋内，并记录实地坐标，共采集土壤样本56个（图3-2）。土样带回实验室后室温下自然风干和研磨，依次全部通过20、60和 100 目尼龙筛，置于自封袋中保存备用。

From October 2018 to June 2019, the research team carried out three on-site investigations and grid-based soil sampling campaigns for farmland soil surrounding heavy metal-related enterprises in Beilaladi Village, Anxin County, covering a total area of approximately 13.3 hm² (210 mu).

In October 2018, systematic sampling was conducted on the farmland soil in the study area using the 50 m × 50 m grid sampling method in accordance with the "Technical Specification for Environmental Quality Monitoring of Farmland Soil" (NY/T 395-2012), with the total surveyed area being about 13.3 hm² (210 mu).

0–20 cm topsoil samples were collected via the five-point sampling method. After being thoroughly mixed in equal proportions, approximately 1 kg of the mixture was obtained using the quartering method, packed into polyethylene sealed bags, and their on-site coordinates were recorded. A total of 56 soil samples were collected (Figure 3-2).

After being transported to the laboratory, the soil samples were air-dried at room temperature and ground, then sequentially passed through 20-, 60-, and 100-mesh nylon sieves, and finally stored in self-sealing bags for future use.