湖南生态科学学报2023，Vol.10Issue(4)：26-32,7.DOI:10.3969/j.issn.2095-7300.2023.04.004
3种碱性物料施用对不同pH下酸性镉污染稻田修复效应
Remediation Effects of Three Alkaline Materials on Cadmium Pollution in Acidic Paddy Soil at Different pH
摘要
Abstract
[Objective]It is to explore the precise remediation technology of adding alkaline materials to acidic paddy soil.[Method]Based on the use of three alkaline acid regulating materials(quicklime,limestone powder,and oyster shell powder)to regulate the experimental soil to two different target pH values,the cadmium availability,soil physicochemical properties,rice yield,and rice cadmium content of the experimental soil were measured.[Result]The application of three alkaline materials at different target pH values significantly reduced the available cadmium content in the soil compared to the control group.When the target pH was 6.5,the reduction rates ranged from 31.52%to 45.68%,and when the target pH was 7.0,the reduction rates were more significant,ranging from 48.89%to 50.45%.The ap-plication of three alkaline materials had the effect of improving soil physicochemical properties and main-taining soil nutrients.The cadmium content in rice significantly decreased(P<0.05),with a maximum decrease of 60.13%when applying limestone powder to adjust the soil pH to 7.0.The implementation of alkaline materials resulted in a small reduction in rice yield.[Conclusion]It is suggested that applying limestone powder with a pH value of 7.0 as the target to achieve the best comprehensive restoration effect according to the risk control of Cd pollution in acidic paddy soil in the experimental area.关键词
酸性稻田/Cd污染/碱性物料/修复效应Key words
acidic soil/cadmium pollution/alkaline materials/remediation effect分类
资源环境引用本文复制引用
陈艳秋,管权,李锐明,焦位雄,张丽,杨伟,杨正兰,林勇..3种碱性物料施用对不同pH下酸性镉污染稻田修复效应[J].湖南生态科学学报,2023,10(4):26-32,7.基金项目
国家自然科学基金项目(41877403). （41877403）
