多因子系数法用于广西水稻田土壤镉危害风险评价  

Risk Assessment of Cadmium Hazard in Guangxi’s Paddy Soil by Multifactor Coefficient Method

作　　者：李鸿[1,2,3] 甘志勇 LI Hong;GAN Zhiyong(Guangxi Subtropical Crops Research Institute,Nanning,Guangxi 530001,China;Laboratory of Quality and Safety Risk Assessment for Agricultural Product(Nanning),Ministry of Agriculture,Nanning,Guangxi 530001,China;Quality Supervision andTesting Center for Subtropical Fruits and Vegetables(Nanning),Ministry of Agriculture,Nanning,Guangxi 530001,China)

机构地区：[1]广西壮族自治区亚热带作物研究所,广西南宁530001 [2]农业部农产品质量安全风险评估实验室(南宁),广西南宁530001 [3]农业部亚热带果品蔬菜质量监督检验测试中心,广西南宁530001

出　　处：《农业研究与应用》2021年第1期53-58,共6页Agricultural Research and Application

基　　金：广西科技基地和人才专项(桂科AD17129008);广西科研院所基本科研业务费专项(桂热研201510)。

摘　　要：研究广西水稻土壤母质中镉对稻米质量安全危害,建立合理评价土壤质量的方法,以推进广西优势富硒土地资源可持续发展。分析测试稻米中镉及土壤中镉、pH、有机质等多个环境因子,筛查影响稻米积累镉的主要因子,建立评价土壤中镉危害稻米安全的多因子系数法。采用该方法对广西水稻土中镉的风险进行评价,其预测稻米中镉含量超过限量值的结果,与用土壤环境质量标准预测结果相比较,准确率提高1倍,漏判减少85%。多因子系数法有待进一步完善,为优化土壤质量评价方法提供借鉴。We analyzed the cadmium in paddy soil and its hazard on rice in Guangxi, and established a method for reasonable evaluation of soil quality, so as to promote the sustainable development of Guangxi’s dominant selenium-rich land resources. Based on test and analysis of the cadmium in rice and soil, soil pH, soil organic matter and other environmental factors,found out the main factors affecting the cadmium accumulation in rice, and established a multifactor coefficient method for evaluating the cadmium in paddy soil and its harm on rice. This method was used to evaluate the cadmium risk in Guangxi’s paddy soil, and the predicted value of cadmium content in rice exceeded the limit value. Compared with the soil environmental quality standards,this method doubled the accuracy rate and reduced the missed penalty by 85%.The multifactor coefficient method should be further improved, so as to provide a reference for optimizing soil quality evaluation method.

关 键 词：多因子系数法 土壤 镉 风险评价 

分 类 号：X53[环境科学与工程—环境工程]