锌硒配施对水稻汞的阻隔效应  

Barrier Effect of Zinc and Selenium Combined Application on Mercury Accumulation in Rice

作　　者：黄秋 刘静[1,2,3] 秦樊鑫 罗帮林[4] 罗林 李宛蔚 徐安琪[1,2,3] HUANG Qiu;LIU Jing;QIN Fan-xin;LUO Bang-lin;LUO Lin;LI Wan-yu;XU An-qi(School of Life Sciences,Guizhou Normal University,Guiyang 550025;Guizhou Normal University,Key Laboratory of Biodiversity Protection in Southwest Karst Mountains,State Forestry and Grassland Administration,Guiyang 550025;Guizhou Normal University,Key Laboratory of Plant Physiology and Development in Guizhou Province,Guiyang 550025;College of Resources and Environment,Southwest University,Beibei 400715)

机构地区：[1]贵州师范大学生命科学学院,贵阳550025 [2]贵州师范大学西南喀斯特山地生物多样型保护国家林业和草原局重点实验室,贵阳550025 [3]贵州师范大学贵州省植物生理与发育重点实验室,贵阳550025 [4]西南大学资源环境学院,北碚400715

出　　处：《生物技术通报》2024年第6期143-151,共9页Biotechnology Bulletin

基　　金：国家自然科学基金委员会-贵州省人民政府喀斯特科学研究中心项目(U1812401)。

摘　　要：【目的】研究锌硒配施对土壤-水稻体系中水稻富集转运汞的影响,探讨锌硒配施对水稻汞的阻隔效应,为汞污染土壤安全利用提供参考。【方法】选取贵州铜仁碧江区某矿区汞污染土壤,以水稻品种川康优727为研究对象,采用盆栽试验,测定水稻生长发育特征以及土壤有效汞和水稻各器官汞含量。【结果】锌硒配施使土壤中有效汞含量显著降低了45%-75.2%,低浓度硒与锌配施使土壤有效汞含量降低75.2%;锌硒配施使水稻各器官汞降低了15.2%-92.3%,其中,籽粒汞含量的降幅效果最好(87.6%-92.3%)。除高浓度硒和高低浓度锌配施促进了水稻汞从根到籽粒转运外,锌硒配施对水稻富集与转运汞的阻隔效果均优于锌、硒单施,锌硒配施使水稻汞从根到籽粒的富集系数降低了88%-92%,低浓度硒与高低浓度锌配施对水稻汞从根到籽粒的转运系数分别降低了69.2%和61.5%。【结论】锌硒配施对水稻汞的阻隔效应显著,有效缓解了汞对水稻生长发育的毒害作用。【Objective】To study the effects of combined application of zinc and selenium on the accumulation and transport of mercury in rice in a soil-rice system,and to investigate the barrier effect of combined zinc and selenium application on mercury in rice,and provide a reference for the safe utilization of mercury-contaminated soil.【Method】Selecting mercury-contaminated soil in the mining area of Bijiang District,Tongren,Guizhou,having the rice variety Chuankangyou 727 as the research subject,and using pot experiment,we measured the growth and development characteristics of the rice plant,as well as the available mercury in the soil and the mercury content in various organs of rice.【Result】The simultaneous application of zinc and selenium reduced the available mercury content in the soil by 45%to 75.2%.Alternatively,when low concentrations of selenium and zinc were applied together,the available mercury content in the soil reduced by 75.2%.The application of zinc and selenium in combination resulted in a reduction of mercury levels in different organs of rice plant by 15.2%to 92.3%.The most effective reduction effect was in the mercury content of the grain,with a decrease of 87.6%to 92.3%.Except for the high concentration of selenium and the combination of high and low concentrations of zinc,which promoted the transportation of mercury from the roots to the grains in rice plant,the blocking effect of a zinc-selenium combination on the accumulation and transportation of mercury in the rice plant was better than that of zinc or selenium applied individually.The combination of zinc and selenium reduced the enrichment coefficient of mercury from roots to grains in rice by 88%to 92%.Similarly,when low concentration selenium was combined with both high and low concentrations of zinc,the transportation coefficient of mercury from the roots to the grains in rice plant reduced by 69.2%and 61.5%respectively.【Conclusion】The combined application of zinc and selenium has a significant blocking effect on mercury in

关 键 词：汞 锌 硒 转运系数 富集系数 

分 类 号：X53[环境科学与工程—环境工程] X173[农业科学—作物学] S511