贵州六盘水市镉污染耕地农艺调控措施研究

据调查，贵州六盘水市耕地土壤环境不容乐观，耕地土壤重金属Cd污染问题突出，切实提高农产品质量安全，受污染耕地安全利用越来越受到关注。本研究选取了典型Cd污染耕地，采用品种调整、原位钝化、微生物修复与叶面调控等4项农艺调控措施试验，通过对治理后土壤中Cd含量和玉米籽粒中Cd含量综合评价治理效果，筛选适宜六盘水市Cd污染耕地的治理技术模式。结果表明，4项措施均可使玉米籽粒中Cd含量不超标，耕地安全利用率均达标，其中降低土壤中镉含量，原位钝化效果最好，最大降幅约23.90%；降低玉米籽实中镉含量，叶面调控措施显著，最大降幅约40.00%。

Research on agronomic control measures of Cadmium-Contaminated farmland in Liupanshui City, Guizhou Province

According to the survey, the soil environment of cultivated land in Liupanshui City, Guizhou is not optimistic, and the problem of heavy metal Cd pollution in the soil of cultivated land is prominent. To effectively improve the quality and safety of agricultural products, the safe use of contaminated cultivated land has attracted more and more attention.In this study, Typical Cd-contaminated farmland was selected, and four agronomic control measures, including variety-adjustment, in-situ passivation, microbial restoration and foliar control, were used to comprehensively evaluate the treatment effect by comprehensively evaluating the Cd content in soil after treatment and the Cd content in corn grains, to screen out the treatment technology model suitable for Cd-contaminated cultivated land in Liupanshui City.The results showed that the four measures could make the Cd content in corn kernels not exceed the standard, and the safe utilization rate of cultivated land all reached the standard. Among them, Reducing the cadmium content in the soil, the in-situ passivation effect was the best, and the maximum reduction rate was about 23.90%; The foliar control measures were significant, and the maximum decrease was about 40.00%.