金属硫酸盐浸种对水稻种子萌发和秧苗镉吸收的影响

为了解金属硫酸盐浸种对水稻种子萌发和秧苗吸收Cd等元素的影响,以水稻品种五丰优286为试验材料,选择多种浓度的硫酸亚铁(FeSO₄)、硫酸锌(ZnSO₄)和硫酸锰(MnSO₄)作为浸种剂进行室内催芽和水培试验,测定水稻胚根长、胚芽长、发芽率,以及秧苗中的Cd、Mg、B、P、K含量。结果显示,FeSO₄和MnSO₄浸种均可提高水稻的发芽率,促进胚根和胚芽生长,且能有效降低秧苗中的Cd含量;而ZnSO₄浸种对水稻胚根和胚芽的生长表现出明显的抑制作用,且会增加秧苗中的Cd含量。FeSO₄和MnSO₄浸种对水稻秧苗Mg、B、P、K的吸收无明显抑制作用,且FeSO₄浸种对秧苗B的吸收有促进作用。总的来看,FeSO₄和MnSO₄浸种具有较好的降低水稻Cd吸收的应用潜力,值得进一步深入研究。

Effects of different sulfate soaking agents on seed germination and cadmium uptake of rice seedlings

To study the effects of sulfate soaking on seed germination and cadmium (Cd) uptake of rice seedlings, rice variety Wufengyou 286 was selected as the test material, and FeSO₄, ZnSO₄, MnSO₄ solutions with various concentrations were used as seed soaking agents in the sprouting and hydroponic experiment. The radicle length, plumule length, germination rate and contents of Cd, Mg, B, P, K in rice seedlings were determined. It was shown that the seed soaking with FeSO₄ or MnSO₄ solution could increase the germination rate of rice, promote the growth of radicle and plumule, and effectively reduce Cd content of rice seedlings. However, the seed soaking with ZnSO₄ solution inhibited the growth of radicle and plumule, and increased Cd content of rice seedlings. The seed soaking with FeSO₄ or MnSO₄solution had no obvious inhibition on the uptake of Mg, B, P, K, and the seed soaking with FeSO₄ solution even could promote B uptake of rice seedlings. In general, the seed soaking with FeSO₄or MnSO₄ solution had application potential for reducing Cd uptake of rice, and was worthy for further research.