稻虾共作模式下稻田pH对土壤和水稻重金属含量的影响  

Effects of pH on heavy metals contents in paddy soil and rice under rice-crayfish co-culture

作　　者：沈丹琪 刘敏[1] 曹凑贵[1,2] 江洋 SHEN Danqi;LIU Min;CAO Cougui;JIANG Yang(College of Plant Science and Techonology,Huazhong Agricultural University/Center for Crop Cultivation and Physiology and Ecology,Wuhan 430070,China;Shuangshui ShuanglüInstitute,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]华中农业大学植物科学技术学院/作物栽培与生理生态研究中心,武汉430070 [2]华中农业大学双水双绿研究院,武汉430070

出　　处：《华中农业大学学报》2023年第2期86-92,共7页Journal of Huazhong Agricultural University

基　　金：中央高校基本科研业务费专项(2662019QD049);湖北洪山实验室重大项目(2021hszd002)。

摘　　要：为探究稻虾共作模式对稻田土壤和水稻中重金属含量的影响,以湘晚籼12号、黄华占、玉针香为试验材料,常规稻作模式为对照,在不同土壤背景条件下(试验地点分别位于湖北省荆门市掇刀区和黄冈市浠水县)开展大田试验。结果显示:在弱碱性土壤背景下,稻虾共作模式中稻田土壤中Cr、As、Cd、Pb和Hg的含量降低,水稻根、茎、穗以及糙米中Cd、Pb含量降低;在弱酸性土壤背景下,稻虾共作模式中稻田土壤中Cr、As、Cd、Pb和Hg的含量升高,水稻根中Cd、Pb含量升高,水稻茎叶穗中Cd含量升高,Pb含量降低,水稻糙米中Cd、Pb含量均降低。本研究结果表明,不同pH土壤背景下稻虾模式对土壤和水稻重金属含量的影响表现不一致,但稻虾模式均可明显降低稻米中Cd和Pb的含量。To explore the effects of rice-crayfish co-culture system on the contents of heavy metals in paddy soil and rice,field experiments were carried out under different soil backgrounds in Jingmen city and Xishui county of Hubei Province,with Xiangwanxian 12,Huanghuazhan and Yuzhenxiang as experimental materials under rice monoculture as control.The results showed that under the background of weak alkaline soil,the contents of Cr,As,Cd,Pb,and Hg in paddy soil decreased,and the contents of Cd and Pb in roots,stems,spikes,and brown rice decreased.Under the background of weak acid soil,the contents of Cr,As,Cd,Pb and Hg in paddy soil increased,the contents of Cd and Pb in rice roots increased,the contents of Cd in stems,leaves and spikes of rice increased,while the contents of Pb in stems,leaves,and spikes of rice decreased,and the contents of Cd,Pb in brown rice decreased.The results showed that the effects of rice-crayfish co-culture system on the contents of heavy metals in paddy soil and rice under different pH soil backgrounds are inconsistent,but rice-crayfish co-culture system can significantly reduce the contents of Cd and Pb in brown rice.

关 键 词：稻虾共作 稻田综合种养 土壤pH 稻田重金属 水稻品种 水稻重金属 绿色稻米 

分 类 号：S511[农业科学—作物学] S966.1