【摘要】 为了寻求有效抑制污染土壤上水稻对重金属Cd的吸收、保持稻米卫生品质的技术方法,通过采用污染土壤盆栽实验,研究了有机酸、EDTA对镉污染土壤上不同基因型水稻稻米品质的影响,结果表明:随着镉污染浓度的增加,糙米中镉含量显著增加,直链淀粉、蛋白质、粗脂肪的含量降低。开花期施加外源有机酸、EDTA,镉污染水稻糙米中镉含量均不同程度下降。以EDTA降低籽粒镉的含量幅度最大,其次是有机酸+1/2EDTA,有机酸作用较弱。外源有机酸、EDTA同时提高了镉污染水稻籽粒蛋白质的含量,EDTA>有机酸、有机酸+1/2EDTA,但不同程度降低了水稻籽粒中直链淀粉、粗脂肪的含量,以EDTA降低幅度较大。就稻米品质而言,在镉污染土壤上,以有机酸+1/2EDTA对于水稻品质效果优于EDTA、有机酸。在镉污染土壤上种植常规水稻品种‘Ⅱ优527’较高镉积累型品种‘秀水63’更易获得高产优质稻米。更多还原

【Abstract】 For exploration of the measures and techniques in inhibiting the uptake of Cd by rice plants and protecting the hygienic quality of rice grains in the polluted soil environment,a study was made on the effects of organic acid and EDTA on quality of different genotypes rice in cadmium polluted soil through a pot experiments,the result showed that cadmium significantly increased cadmium content of rice gains and reduced protein content,starch and crude grease of rice gains with Cd level increasing.In cadmium polluted soil,organic acid,EDTA reduced cadmium content in rice gains.EDTA reduced cadmium content of gains in a big way,next is organic acid + 1/2EDTA;effect of organic acid was weaker.Organic acid,EDTA enhanced protein content of rice gains in cadmium-polluted soil,the order as follows: EDTA > organic acid,organic acid + 1/2EDTA.Organic acid,EDTA decreased contents of starch and crude grease of rice gains in cadmium-polluted soil,and EDTA gave best effect.In cadmium-polluted soil,effect of organic acid+1/2EDTA on quality of rice was better than organic acid,EDTA‘.Ⅱ you 527’was more easily obtained high yield and excellent quality than high grain Cd accumulation‘Xiushui 63’in cadmium polluted soil.更多还原