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通过溶液培养实验,研究两种价态锑Sb(Ⅲ)和Sb(Ⅴ)与B交互作用对水稻吸收积累Sb和B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,增加B用量可缓解Sb对水稻的毒害.Sb(Ⅲ)和Sb(Ⅴ)的添加可显著地影响水稻根系和茎叶对B的吸收积累.当B的浓度为0.5 mg·L-1时,添加三价Sb 30μmol·L-1可以显著地降低水稻茎叶和根系中的B含量57.6%和75.6%(与对照处理相比,P<0.05).同样,增加B用量也影响水稻根系和茎叶对两个价态Sb的吸收积累.在10μmol·L-1Sb(Ⅲ)处理下,添加2.0 mg·L-1的B可导致水稻根系和茎叶Sb含量分别比0.5 mg·L-1B处理降低39.1%和9.2%;在10μmol·L-1Sb(Ⅴ)处理下,添加2.0 mg·L-1的B导致水稻根系Sb含量比0.5mg·L-1B处理降低13.9%.B的应用对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.研究结果表明,在Sb污染农田中可通过施用硼肥来提高植物的硼营养,降低植物对Sb的吸收积累,从而降低Sb对人体健康的危害.
The effects of Sb (Ⅲ), Sb (Ⅴ) and B on the absorption and accumulation of Sb and B in rice were studied by solution culture experiments. The results showed that both of these valences of Sb inhibited the growth of rice (Ⅲ) and Sb (Ⅴ) could significantly inhibit the toxicity of Sb to rice.The addition of Sb (Ⅲ) and Sb (Ⅴ) could significantly affect the content of B When the concentration of B was 0.5 mg · L-1, the addition of trivalent Sb 30 μmol·L-1 could significantly reduce the content of B in the stems, leaves and roots of rice by 57.6% and 75.6% (compared with the control treatment , P <0.05) .In the same way, increasing the amount of B also affected the absorption and accumulation of two valences of Sb in rice roots and stems and leaves. Under the treatment of 10μmol·L-1Sb (Ⅲ), 2.0mg · L-1 B Resulting in a 39.1% and 9.2% reduction of Sb content in roots and stems and leaves of rice compared with 0.5 mg · L-1B treatments respectively. Adding 2.0 mg · L-1 B at 10 μmol·L-1Sb (Ⅴ) Which was 13.9% lower than that of 0.5mg · L-1B treatment.The application of B also had a significant effect on the enrichment coefficient and distribution ratio of Sb in rice roots and stems and leaves.The results showed that boron could be applied in the farmland contaminated by Sb mention Boron nutrition of plants, reducing plant uptake and accumulation of Sb, thereby reducing Sb harm to human health.