调理剂+淹水措施对Cd污染稻田控Cd效果分析  

Effect of Conditioning Agent Combined with Flooding Measures on Absorption and Accumulation of Cadmium in Rice

作　　者：彭鸥[1,2,3] 刘玉玲 铁柏清[1,2,3] 何钟响 杨蕊嘉[1,2,3] 李丹阳 刘寿涛 罗海艳 PENG Ou;LIU Yu-ling;TIE Bai-qing;HE Zhong-xiang;YANG Rui-jia;LI Dan-yang;LIU Shou-tao;LUO Hai-yan(College of Resources and Environment,Hunan Agricultural University,Changsha 410128,China;Hunan Engineering&Technology Research Center for Irrigation Water Purification,Changsha 410128,China;Key Laboratory of Southern China OriginalAgro-Environmental Pollution Prevention and Control,Ministry of Agriculture and Rural Affairs,Changsha 410128,China)

机构地区：[1]湖南农业大学资源环境学院,长沙410128 [2]湖南省灌溉水源水质污染净化工程技术研究中心,长沙410128 [3]农业部南方产地污染防控重点实验室,长沙410128

出　　处：《环境科学》2019年第9期4287-4294,共8页Environmental Science

基　　金：国家重点研发计划项目(2017YFD0801505);湖南省科技计划项目重点研发计划项目(2016NK2017);长沙市科技计划项目(kq1801025)

摘　　要：为探明淹水措施、基施湘润邦土壤调理剂、矿物硅肥+喷施叶面肥、石膏粉以及综合处理对不同污染土壤修复效果和作用机制,通过在3个不同类型Cd污染耕地布置小区试验,研究了单一处理及综合措施对阻控污染耕地稻米吸收累积Cd的影响.结果表明,淹水措施、单一施用调理剂、综合施用结合淹水处理能降低土壤有效态Cd和水稻各器官Cd含量,土壤有效态Cd降低6.58%~30.01%,糙米Cd含量降低12.65%~68.68%,降低效果为综合处理(T6)>基施石膏粉(T5)>基施湘润邦土壤调理剂(T3)>矿物硅肥+喷施叶面肥(T4)>淹水处理(T2)(以两季水稻糙米Cd含量降低效果平均值计算).试验中5个处理使水稻各部位富集系下降,是引起糙米Cd含量下降的主要原因之一.根据田间小区试验显示,基施湘润邦土壤调理剂、矿物硅肥+喷施叶面肥和石膏粉组配施用结合淹水措施可作为Cd污染耕地稻米Cd阻控的有效方法.In order to evaluate the effects and mechanisms of flooding measures,soil conditioner,silicon mineral fertilizer and sprayed foliar fertilizer,gypsum powder,and their multiple treatments for reducing Cd accumulation in rice grown in Cd-contaminated soil.A plot experiment was conducted in three different Cd-contaminated soils.The results showed that flooding measures,a single application of conditioning agents,and combined application and flooding treatment can reduce soil-available Cd and the Cd content in various organs of rice with 6.58%-30.01% reduction in soil available-Cd and 12.64%-68.68% reduction in Cd content in brown rice, respectively.The Cd reduction decreased in the following order:comprehensive treatment (T6)> basic application of gypsum powder (T5)> base Xiangrunbang state soil conditioner (T3)> mineral silicon fertilizer and spray foliar fertilizer (T4)> flood treatment (T2).In addition,the average value of the reduction effect of the Cd content in brown rice was calculated.The five treatments in the experiment reduced the enrichment of various parts of the rice,which is a main reason for the decrease in Cd content in the brown rice. According to the field plot test,the combined application of the basic conditioning agent,mineral silicon fertilizer,and sprayed foliar fertilizer,and gypsum powder and flooding measures can be used as an effective method for Cd pollution control in Cd-contaminated cultivated rice.

关 键 词：土壤调理剂 水稻 CD 硅肥 富集系数 

分 类 号：X171[环境科学与工程—环境科学]