向猛;黄益宗;蔡立群;保琼莉;黄永春;王小玲;高柱;余发新;乔敏;胡莹;金姝兰;李季;王斐;

• 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
• 3:江西省科学院生物资源研究所
• 4:中国科学院生态环境研究中心

摘要(Abstract)：

通过溶液培养试验,研究外源钙对两种价态锑[Sb(III)和Sb(Ⅴ)]胁迫下水稻吸收积累锑和钙的影响。结果表明,这两种价态的Sb对水稻生长均有抑制作用,Sb(III)比Sb(Ⅴ)对水稻毒害更明显,施Ca可缓解Sb对水稻的毒害。Sb(III)和Sb(Ⅴ)的添加对水稻根系和茎叶吸收积累Ca影响不一致。当溶液中的Ca浓度为5.0 mmol·L-1时,添加三价Sb 10和30μmol·L-1均可以显著地降低水稻茎叶中的Ca含量15.7%和49.4%,但是添加Sb(Ⅴ)浓度为30μmol·L-1时,却分别提高水稻茎叶和根系Ca含量26.2%和50.4%。Ca的添加可以显著地降低水稻根系和茎叶对两个价态Sb的吸收积累。在30μmol·L-1Sb(III)处理下,添加5.0和20 mmol·L-1的Ca可导致水稻根系和水稻茎叶Sb浓度分别比对照处理降低19.0%-79.4%和42.6%-71.8%;在30μmol·L-1Sb(Ⅴ)处理下,添加5.0和20 mmol·L-1的Ca可导致水稻根系和水稻茎叶Sb浓度分别比对照处理降低34.3%-70.6%和74.1%-84.6%。Ca的添加对Sb在水稻根系和茎叶中的富集系数和分配比率也有显著影响。综上所述,可以通过施用Ca肥来防治农田Sb污染,降低Sb对人体健康的危害。

关键词(KeyWords)： 钙;锑;水稻;交互作用;毒害;富集系数

Abstract:

Keywords:

基金项目(Foundation): 江西省科学院省级重点实验室开放基金项目(2013-KLB-08和2012-KLB-1);; 国家自然科学基金面上项目(21377152);; 天津市自然科学基金项目(12JCYBJC19900)资助

作者(Author): 向猛;黄益宗;蔡立群;保琼莉;黄永春;王小玲;高柱;余发新;乔敏;胡莹;金姝兰;李季;王斐;

Email:

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