摘要
选择长株潭地区不同镉(Cd)污染特征稻田,施用"宇丰"土壤调理剂,探明其在不同Cd污染稻田中的修复效果。结果表明:施用的石灰和土壤调理剂皆可显著提高酸性土壤p H值,有效降低土壤有效态Cd含量,显著降低水稻对Cd的吸收积累。施用石灰1 500 kg/hm2平均可提高土壤p H值0.35个单位,降低稻米Cd含量34.54%;而施用土壤调理剂1 500 kg/hm2则可平均提高土壤p H值0.30个单位,降低稻米Cd含量46.20%,效果优于石灰。施用石灰降低稻米Cd含量的效果主要受土壤Cd有效率的调控;而施用土壤调理剂降低稻米Cd含量是多途径抑制水稻对Cd吸收和转运的综合效果,因而"宇丰"土壤调理剂降低稻米Cd含量的效果更稳定,适应范围更广。
A field experiment of remediation effect of“Yufeng”passivator in different Cd pollution characteristics paddy soils in Chang-Zhu-Tan area.The results suggested that both soil conditioner and lime significantly increased the pH and decreased the content of available Cd in soil,absorption and accumulation of Cd in rice.Treatment with1500kg/hm2lime increased soil pH by0.35and thus decreased Cd content in rice by34.54%,while the soil conditioner increased soil pH0.30and decreased Cd in rice grain up to46.20%.the results also suggested the effect of lime on reducing Cd content in rice was regulated by available Cd in soil.However,the soil conditioner inhibited Cd absorption and translocation via several pathways.The results demonstrated the potential effect of“Yufeng”soil conditioner in reducing Cd concentration in rice grain,which was stable and ideal for wider application.
作者
谢运河
黄伯军
纪雄辉
田发祥
魏维
官迪
XIE Yun-he;HUANG Bo-jun;JI Xiong-hui;TIAN Fa-xiang;WEI Wei;GUANG Di(Hunan Institute of Agro-Environment and Ecology, Key Lab of Prevention, Control and Remediation of Soil Heavy Metal Pollution in Hunan Province, Changsha 410125, PRC;Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410125, PRC;Ministry of Agriculture Key Lab of Agri-Environment Institute in the Midstream of Yangtze River Plain, Changsha 410125,PRC;Center for Foreign Economic & Technical Cooperation, Hunan Department of Agriculture, Changsha 410005, PRC)
出处
《湖南农业科学》
2017年第12期26-30,共5页
Hunan Agricultural Sciences
基金
水利部公益性行业科研专项项目(201501019)
湖南省农业科学院科技创新项目(2017JC57)
长沙市科技计划项目(kq1703010)
国家水稻产业体系岗位科学家(CARS-01-28)
