土壤改良联合低累积水稻修复镉污染农田的试验研究  

Study on Remediation of Cadmium-Contaminated Farmland by Soil Improvement Combined With Low-Accumulation Rice

作　　者：刘捷 Liu Jie(Guangdong Kaiyuan Environment Technology(Group)Co.,Ltd.,Dongguan 523000,Guangdong,China)

机构地区：[1]广东开源环境科技(集团)有限公司,广东东莞523000

出　　处：《绿色科技》2025年第4期173-179,共7页Journal of Green Science and Technology

摘　　要：本文以粤东某电子废弃物拆解区镉(Cd)污染农田为研究对象,通过小试试验探讨了生石灰、钙镁磷肥和生物有机肥3种改良剂单独和复配处理对土壤的理化性质和有效态Cd的影响,并且筛选出了3种Cd低累积水稻品种(‘深优9516’‘广红3号’和‘晶两优华占’)。通过田间试验考察土壤改良联合Cd低累积水稻种植措施对中度污染农田修复的可行性。结果表明:按照生石灰∶钙镁磷肥∶生物有机肥浓度为300∶300∶1000(kg/亩)时,土壤中重金属Cd有效态含量的降低率能达到79.31%。按照该配比对中度污染土壤进行改良后种植的‘深优9516’‘广红3号’和‘晶两优华占’3种水稻稻谷中重金属Cd含量均能满足《食品安全国家标准食品中污染物限量》(GB 2762——2017)中限值要求,同时3种水稻亩产量均有所提高。In this study,cadmium(Cd)-contaminated farmland was used as the research project near an electronic waste area in eastern Guangdong.The effects of quicklime,calcium magnesium phosphate fertilizer and bio-organic fertilizer alone or in combination on soil physicochemical properties and available Cd were studied by a small-scale test,and three varieties of rice(Shenyou 9516,Guanghong NO.3 and Jingliangyouhuazhan)with low Cd accumulation were further screened out.Additionally,field experiments were conducted to investigate the feasibility of soil improvement combined with low Cd accumulation rice planting to rehabilitate the moderately polluted farmland.The results showed that the effective content of Cd could be reduced by 79.31%when the ratio of quicklime,calcium magnesium phosphate fertilizer and bio-organic fertilizer was 300:300:1000(kg)per mu.The content of Cd in the above three kinds of rice could meet the requirements of the National Food Safety Standard Maximum Levels of Contaminants in Foods(GB 2762-2017)after the remediation of moderately polluted soil according to the ratio of fertilizers.Meanwhile,the yield of rice per mu was increased.

关 键 词：镉污染土壤 镉低累积水稻 原位修复 有效态镉 水稻产量 

分 类 号：X53[环境科学与工程—环境工程]