硫素对土壤砷生物有效性与水稻吸收的影响研究  

Effect of sulfur on the bioavailability of arsenic in soil and its accumulation in rice plant(Oryza sativa L.)

作　　者：邹丽娜 戴玉霞 邱伟迪 张舒 赵佳伟 唐先进[1] 施积炎[1] 徐建明[1] ZOU Li-na;DAI Yu-xia;QIU Wei-di;ZHANG Shu;ZHAO Jia-wei;TANG Xian-jin;SHI Ji-yan;XU Jian-ming(College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China;Shanghai Keling Analytical Technology Co.,Ltd,Shanghai 200123,China;College of Environment,Zhejiang University of Technology,Hangzhou 310032,China)

机构地区：[1]浙江大学环境与资源学院,杭州310058 [2]上海科翎检验技术有限公司,上海200123 [3]浙江工业大学环境学院,杭州310032

出　　处：《农业环境科学学报》2018年第7期1435-1447,共13页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(41671312);浙江省自然科学基金项目(LY16D030001);国家科技支撑计划项目(2015BAD05B04)~~

摘　　要：为探讨硫素添加对土壤-水稻系统中砷迁移转化的影响,通过在添加砷的污染土壤中施加不同形态硫素,采集全生育期土壤溶液和成熟期水稻植株样品,分析硫素添加对砷移动性、生物有效性以及水稻砷吸收的影响。结果表明:微生物在影响土壤溶液中Fe(Ⅱ)和砷的移动性方面起到了重要作用,灭菌处理与不灭菌处理差异较大;硫素的添加降低了根际、非根际土壤溶液中砷的移动性,降低了As(Ⅲ)的浓度,从而降低了砷的毒性;硫素添加也降低了根际土壤中砷的生物有效性,相同硫含量的硫酸钠比单质硫的影响更显著。硫素添加促进了水稻的生长,促进了水稻根表铁膜的形成,一定程度降低了水稻地上部对砷的累积,但是过量硫素的施用可能会增加水稻米粒中砷的累积。In order to investigate the effect of sulfur on the migration and transformation of arsenic(As)in soil-rice system,different forms of sulfur were applied to the exogenous As-contaminated soil.Soil solution was collected during the whole growth period,and rice plants were collected at the maturing stage.The effect of sulfur on the mobility and bioavailability of As and the influence on As accumulation in rice was examined.The results showed that the microorganisms played an important role in affecting the mobility of Fe(Ⅱ)and As in soil solution,and there was a great difference between sterilization treatment and non-sterilization treatment.The addition of sulfur reduced the mobility of As in the rhizosphere and non-rhizosphere soil solution,reduced the concentration of As(Ⅲ),and thus reduced the toxicity of As.Sulfur also reduced As bioavailability in the rhizosphere soil.With the same sulfur content,Na2SO4 was more effective than S^0.The growth of rice was also promoted and more iron plaque was formed on the root surface.The addition of sulfur reduced As accumulation in rice shoots to a certain extent.However,excess sulfur might increase the accumulation of As in rice.

关 键 词：砷 稻田土壤 硫素 生物有效性 根表铁膜 

分 类 号：X53[环境科学与工程—环境工程]