袁彪;黄益宗;蔡立群;黄永春;保琼莉;王培培;刘仕翔;

• 1:甘肃农业大学资源与环境学院
• 2:农业部环境保护科研监测所

摘要(Abstract)：

通过溶液培养试验,研究外源添加Mo对2种价态砷(As(Ⅲ)和As(Ⅴ))胁迫下水稻吸收积累Mo和As的影响。结果表明,这2种价态的As对水稻生长均有抑制作用,As(Ⅲ)比As(Ⅴ)对水稻毒害更明显,添加Mo可缓解As对水稻的毒害。As添加可影响水稻根系和茎叶对Mo的吸收积累,但是不同价态As对Mo积累量的影响不一致。同时,Mo的添加也可以显著地降低水稻根系和茎叶对2个价态As的吸收积累。在100μmol·L~(-1)As(Ⅲ)处理下,添加0.1和0.5 mg·L~(-1)的Mo可导致水稻根系As积累量分别比对照处理降低38.8%和52.8%,茎叶As积累量分别降低5.1%和10.6%;当As(V)浓度为100μmol·L~(-1)时,添加0.1和0.5 mg·L~(-1)的Mo可导致水稻根系As积累量分别比对照处理降低15.4%和62.4%,茎叶As积累量分别降低11.9%和23.7%。Mo的添加还能显著地降低2种价态As在水稻根系和茎叶中的富集系数。因此,通过施用适量的Mo肥可以用来防治农田As污染,降低As对人体健康的危害。

关键词(KeyWords)： Mo;As;水稻;胁迫作用;富集系数;根长

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划项目(2015BAD05B02);; 中央级公益性科研院所基本科研业务费专项资金(农业部环境保护科研监测所)项目

作者(Author): 袁彪;黄益宗;蔡立群;黄永春;保琼莉;王培培;刘仕翔;

Email:

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