土壤中铬含量对农产品安全性影响评价

目的 探索土壤中铬含量对农产品质量安全的影响。方法 采集农产品生产基地土壤样品120个，同步采集成熟农产品样品200个，测定土壤样品pH、全量铬和农产品样品总铬含量，协同分析土壤铬污染情况和农产品铬含量情况。结果 土壤铬含量风险筛选范围占9.17%，存在轻微铬污染。农产品中铬含量合格率达100%，安全性高。各类农产品对铬的富集能力排序为谷物＞叶菜类＞豆类＞芸薹属类＞茄果类＞瓜类，且吸收富集作用差异明显。各类农产品对铬的吸收富集作用与土壤pH关联性不强。结论 土壤受铬污染并不一定会造成农产品铬含量超标，这对受铬污染的土壤调整产业结构以保障农产品质量安全很有启发。

Evaluation of the effect of chromium content in soil on the safety of agricultural products

Objective To explore the influence of chromium content in soil on the quality and safety of agricultural products. Methods One hundred and twenty soil samples were collected from agricultural production bases and 200 samples of mature agricultural products were collected simultaneously to determine the pH of soil samples, total chromium and total chromium content of agricultural products samples, and to collaboratively analyze the chromium contamination of soil and chromium content of agricultural products. Results The risk screening range of chromium content in soil accounted for 9.17%, with minor chromium contamination. The chromium content in agricultural products was qualified at 100% with high safety. The enrichment ability of chromium in various agricultural products was ranked as cereals > leafy vegetables > legumes > Brassica spp. > eggplant > melon, and the difference of absorption and enrichment was obvious. The correlation between chromium enrichment and soil pH was not strong for all types of agricultural products. Conclusion Chromium contamination of soils does not necessarily result in excessive chromium content in agricultural products, which is an inspiration for adjusting the industrial structure of chromium-contaminated soils to ensure the quality and safety of agricultural products.