糙米与水稻植株中镉含量的关系

目的]研究糙米中重金属镉含量与水稻植株中镉积累的关系。方法]以6个水稻品种为试材,设置5个土壤镉浓度处理的盆栽试验,对水稻糙米中重金属镉的积累与水稻植株间的相关性进行了研究。结果]水稻糙米与水稻植株分蘖期的重金属镉含量的相关系数没有达到显著相关;出穗期,只有水稻茎秆中的镉含量与糙米的相关系数为显著相关;在水稻的成熟期,水稻糙米与水稻植株镉含量的相关系数在土壤镉含量较低时都为显著相关,而在较高浓度时,只有水稻的茎秆与糙米镉含量的相关系数达到显著相关。结论]水稻糙米中的镉含量只与水稻植株中的茎秆的镉含量有关联。选择茎镉含量低的水稻品种,可得到糙米对重金属镉低积累的水稻品种。

Relationship between Cd Content of Brown Rice and that of Rice Plant

Objective] The research aimed to study the relationship between Cd content of brown rice and that of rice plant.Method] A pot experiment with six rice varieties in a paddy soil treated with five levels of cadmium was conducted to study the correlation between Cd accumulation of brown rice and that of rice plant.Result] It was found that the correlation coefficients were not significant at tillering stage.At heading stage,it was only four correlation coefficients were significant between brown rice Cd content and that of rice stem.At mature stage,the correlation coefficients were all significant at low Cd content of soil.At high Cd content in soil,only the correlation coefficients between brown rice and rice stem were significant.Conclusion] Cd content of brown rice had relation with rice plant in rice stem.The rice breed with low concentration of cadmium of brown rice can be gained by means of selection of rice breed of low concentration of cadmium in rice stem.