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采用盆栽和水培试验研究了华南地区水稻（Ｏ．Ｓａｔｉｖａ）的主要品种对Ｃｄ吸收累积的差异和引起差异的原因。盆栽试验结果表明，供试的２０多个品种生长在同一污染土壤上，汕优６３、汕优６４等杂交稻，产量较高，但糙米Ｃｄ含量也较高；野奥丝苗、增城丝苗、黑糯等优质稻糙米重金属含量较低；常规稻则变幅较大。作物品种间差异可达１倍以上。在同一Ｃｄ浓度和营养液配方条件下的水培试验显示，与汕优６３相比，糙米Ｃｄ含量较低的野奥丝苗其单位产量的耗水量、根冠比、Ｃｄ向糙米的迁移率明显较低。而且Ｃｄ向糙米的迁移率二者相差１倍多，汕优６３为３８．４％，野奥丝苗为１６．２％，是造成糙米Ｃｄ含量差异的主要原因
Pot experiments and hydroponic experiments were conducted to study the differences in Cd uptake and the reasons for the differences among the main cultivars of O. sativa from southern China. The results of pot experiment showed that more than 20 cultivars were grown on the same contaminated soil, and the yield was higher in hybrid rice Shanyou 63 and Shanyou 64, but the Cd content in brown rice was also higher. , Black waxy brown rice and other high-quality low-level brown rice; conventional rice is a larger amplitude. Differences between crop varieties up to 1 times more. Under the same Cd concentration and nutrient solution formula, hydroponic experiments showed that compared with Shanyou 63, the content of water per unit area, root / shoot ratio and the rate of brown rice to brown rice were lower Obviously lower. Moreover, the migration rate of Cd to brown rice was more than double that of Shanyou 63, 38.4% of Shanyou 63 and 16.2% of the wild osmanthus seedlings, which was the main reason for the difference of Cd content in brown rice