铬Cr^(6+)对水稻种子萌发及幼苗生长的影响

Effect of chromium(Cr^(6+)) on rice seed germination and seedling growth

采用水培和土培试验方法,研究了不同浓度的铬(Cr6+)对水稻种子萌发、幼苗生长的影响,结果表明,六价铬对水稻种子的萌发及出苗都有不良影响;幼苗随着铬(Cr6+)浓度的增加,植株的生长明显受到抑制,株高、根长、鲜重和干重均下降,但水培较土培所引起铬的危害起始浓度更小,失绿症状更严重。

In present paper the effect of chromium （Cr^6＋ ） on rice seed germination and seedling growth were studied. It was showed that Cr^6＋ was harmful to germination and growth of rice. With increase of Cr^6＋ concentrations, the seedling height, root length, fresh weight and dry weight decreased, the rice seedling growth was inhibited distinctly, but the outset density of chromium harmful to paddy plants in hydro - culture experiments was lower than that in pot - culture experiments, with more serious chlomsis symptoms.