不同淹水处理对水稻体内砷富集的影响  

The effect of flooded treatment on the enrichment of arsenic in rice

作　　者：杨扬 高莉莉 张慧 吕晓 YANG Yang;GAO Li-li;ZHANG Hui;LYU Xiao(Shenyang Institute of Atmospheric Environment,China Meteorological Administration,Shenyang 110166,China;Jinzhou Ecology and Agrometeorological Center,Jinzhou 121000,Liaoning,China;Jinzhou Meteorological Bureau,Jinzhou 121000,Liaoning,China)

机构地区：[1]中国气象局沈阳大气环境研究所,沈阳110166 [2]锦州市生态与农业气象中心,辽宁锦州121000 [3]锦州市气象局,辽宁锦州121000

出　　处：《湖北农业科学》2020年第23期58-62,共5页Hubei Agricultural Sciences

基　　金：中国气象局沈阳大气环境研究所开放基金项目(2018SYIAE06);辽宁省气象局科研项目(201813)。

摘　　要：利用盆栽试验研究了不同淹水处理条件下土壤溶液中砷含量的变化及砷在水稻(Oryza sativa L.)体内的富集状况。结果表明,水稻整个生长发育期内都淹水处理(F)下土壤溶液中的砷主要以三价砷为主,且三价砷含量随着淹水时间的延长明显增加,而在水稻整个生长发育期内都不淹水处理(NF)下土壤溶液中砷含量较少且以五价砷为主。当水稻开花之后,对淹水的水稻排水(FNF)和不淹水的水稻淹水(NFF)后,土壤溶液中的砷含量分别显著减少和增加。在水稻分蘖期,淹水与否对水稻干物质量无明显影响,但不淹水的处理却显著降低了砷在水稻体内的积累。对于不同的淹水处理,水稻子粒平均干重表现为NFF>F>NF>FNF。水稻子粒、瘪粒和秸秆的砷含量表现为F>FNF>NFF>NF,且含量在不同处理间存在极显著差异(P<0.01);各处理水稻不同部位的砷含量均表现为秸秆>瘪粒>子粒。The arsenic(As)concentration in soil and As enrichment in rice(Oryza sativa L.)were studied under different flooded treat⁃ment using pot experiments.The results showed that As in soil solution mainly existed as As(III)and its concentration increased with flooded time for flooded treatment in whole rice growing(F).The As concentration was low and mainly existed as As(V)for unflooded treatment in whole rice growing(NF).When soil were aerobic and flooded for FNF and NFF treatments after flowering,As in soil solu⁃tion decreased and increased markedly,respectively.At the stem extension,weight of rice was not affected by different flooded treat⁃ment.But As concentration was much lower in unflooded rice than in flooded rice.Grain weight in the different flooded treatment fol⁃lowed the decreased order of NFF,F,NF and FNF.As concentrations in grain,straw and empth grain followed the decreased order of F,FNF,NFF,NF.While the order of As concentrations in rice tissues from highest to lowest were straw,empth grain and grain.

关 键 词：水稻(Oryza sativa L.) 淹水 砷含量 

分 类 号：S511[农业科学—作物学]