水稻中重金属的含量及其富集因素的探讨

采集我国12种土壤,进行盆栽水稻试验,结果表明:不同土壤上盆栽水稻糙米中镉、铜、锌、镍和铬的平均含量分别为0.035ppm、4.82ppm、23.45ppm、1.09ppm和0.102ppm,铅在糙米中未检出。 按自然地带划分,不同土壤上生长的糙米中6种元素除铬外,均以热带、亚热带湿润地区含量高。 不同土壤投加6种元素后种植水稻,以有机质含量高,pH适中的土壤上水稻生长较好,但各类土壤上生长的水稻均表现出受害症状。重金属在糙米中的累积随土壤pH升高而降低,随土壤有机质含量增高而减少。与土壤中<0.01毫米和<0.005毫米粒径含量呈负相关。

CONTENTS OF HEAVY METALS AND THEIR ENRICHMENT FACTORS IN RICE

Tweleve types of soil of China are dealt with, and the results of experiment on potter rice made by authors are discussed in this paper.Contents of Cd, Cu, Zn, Ni and Cr in the potted rice growing in tweleve types of soil of China are 0.035ppm, 4.82ppm, 23.45ppm, 1.09ppm and 0.102ppm respectively. Pb is not surveyed in experiment.Except Cr element, natural contents of six kinds of heavy metals in growing rice are very high in the tropical and subtropical wet zones, added the six kinds of heavy metals to soi...