不同矿物调理剂对Cd污染水田土壤性质及水稻Cd含量的影响  

Effect of different mineral conditioners on soil properties of Cd-contaminated paddy field and rice Cd content

作　　者：李少华 潘荣祝 陆贵佳 何烨 蒋代华[1] 黄智刚[1] LI Shao-hua;PAN Rong-zhu;LU Gui-jia;HE Ye;JIANG Dai-hua;HUANG Zhi-gang(College of Agriculture,Guangxi University/Guangxi Key Laboratory of Agro-environment and Agro-product Safety,Nanning 530004,China;Pioneer College,Inner Mongolia University,Hohhot 010000,China;College of Modern Agriculture and Ecological Environment,Heilongjiang University,Harbin 154000,China)

机构地区：[1]广西大学农学院/广西农业环境与农产品安全重点实验室,南宁530004 [2]内蒙古大学创业学院,呼和浩特010000 [3]黑龙江大学现代农业与生态环境学院,哈尔滨154000

出　　处：《西南农业学报》2024年第3期597-603,共7页Southwest China Journal of Agricultural Sciences

基　　金：广西创新驱动发展专项(桂科AA17204078)。

摘　　要：【目的】探究不同矿物调理剂对广西镉(Cd)污染水田土壤性质及水稻Cd含量的影响,为利用水田生产安全稻米提供参考依据。【方法】选用钙镁硅调理剂A和B、钙硅调理剂C和钙镁调理剂D(分别设为A、B、C和D处理),在广西某受Cd污染水田开展Cd污染大田修复治理试验,以不施用调理剂为对照(CK)。处理后于水稻成熟期测定土壤的pH、阳离子交换量(CEC)、总Cd和土壤有效态Cd含量及水稻根、茎、叶和籽粒的Cd含量,分析不同矿物调理剂对Cd污染水田土壤的修复治理效果及Cd在水稻各部位的残留状况,并对土壤总Cd含量、CEC和pH与有效态Cd含量进行相关分析。【结果】施用矿物调理剂可显著提高Cd污染水田的土壤pH和CEC(P<0.05,下同),二者分别较CK提高15.0%~16.6%和20.4%~23.8%;可显著降低Cd污染水田的土壤有效态Cd含量,较CK下降14.0%~19.3%。施用矿物调理剂后水田的土壤有效态Cd含量与pH呈显著负相关,pH的对数ln(pH)值与土壤有效态Cd含量的相关系数为0.4053;ln(pH)值与CEC呈极显著负相关(P<0.01),相关系数为0.6326;随着土壤pH和CEC的上升,土壤有效态Cd含量持续下降。施用矿物调理剂均可有效降低水稻根、茎、叶和籽粒的Cd含量及水稻地上部Cd的富集系数,其中,水稻籽粒的总Cd含量下降35.9%~50.2%,水稻地上部(茎、叶和籽粒)Cd的富集系数分别下降19.5%~33.5%、32.1%~44.9%和38.6%~52.6%。【结论】施用不同矿物调理剂均可显著提升水田土壤pH和CEC,从而降低土壤有效态Cd含量,抑制Cd从土壤向水稻根、茎、叶和籽粒迁移,有效降低水稻Cd含量,减少Cd在水稻地上部(茎、叶和籽粒)富集。【Objective】The present paper aimed to investigate the effects of different mineral conditioners on the soil properties of cadmium(Cd)-contaminated paddy fields and the Cd content of rice in Guangxi,so as to provide a reference basis for the utilization of paddy fields to produce safe rice.【Method】Calcium-magnesium-silicon conditioners A and B,calcium-silicon conditioner C and calcium-magnesium conditioner D(set up as treatments A,B,C and D,respectively)were selected to carry out Cd-contaminated field remediation and treatment experiments in a Cd-contaminated paddy field in Guangxi,and no n-conditioner was applied as control(CK).The pH,cation exchange capacity(CEC),total Cd and soil available Cd content,Cd content of rice roots,stems,leaves and seeds were determined at the rice maturity stage after the treatment to analyze the remediation and treatment effects of different mineral conditioners on Cd-contaminated paddy soils and the residual status of Cd in various parts of rice,and to analyze the correlation between soil total Cd content,CEC and pH and available Cd content.【Result】The application of mineral conditioner could significantly increase soil pH and CEC of Cd-contaminated paddy fields(P<0.05,the same as below),both of which were increased by 15.0%-16.6%and 20.4%-23.8%respectively compared with those of CK;And it could significantly reduce the Cd content in the available state of soil in Cd-contaminated paddy fields,which was decreased by 14.0%-19.3%compared with that of CK.The soil available state Cd content of the paddy field after the application of mineral conditioners showed a significantly negative correlation with pH,and the correlation coefficient between the log ln(pH)value of pH and the soil available state Cd content was 0.4053;It showed a highly significantly negative correlation with CEC(P<0.01),and the correlation coefficient was 0.6326;With the increase in soil pH and CEC,the soil available state Cd content continuously decreased.The applications of mineral conditioners were all

关 键 词：Cd污染水田 矿物调理剂 修复治理 水稻 安全稻米 

分 类 号：S143.7[农业科学—肥料学]