施肥措施对水稻吸收~(137)Cs的影响

研究了施用石灰，褐煤和钾肥等对减少＾１３７Ｃｓ在水稻植株中积累的影响。结果表明，施用相当于土壤阳离子代换量１／２０的钾盐，使水稻对＾１３７Ｃｓ的积累比对照组减少３２％以上，随时间变化，这种效应更加显著。

EFFECT OF APPLYING MEASURES OF FERTILIZER ON 137 Cs ABSORPTION BY RICE

The effect of various applying measures with different fertilizer on the absorption of 137 Cs by rice was studied.The results show that the absorption of 137 Cs by rice decreased by 32% compared with control when potassium salt was applied as 1/20 of the exchangeable cations of soil. 137 Cs accumulated in rice seedling decreased more than 76% compared with control after 57 days of 137 Cs contamination.The analytical results illustrated that the exchangeable 137 Cs in soil was lower than that of control when the potassium salt was applied.More than 99% of 137 Cs is bounded to the soil,therefore,it is hard for the rice to absorb 137 Cs from soil.The effect of treatment with low content of potassium salt is better than that of the treatment with the higher one.