土壤有效锌含量受土壤、水份、气候和田间管理因素的交互影响。粘土和有机质对锌有吸附和螯合作用,有很高的阳离子代换量(CEC)。这种土壤中锌通过土壤溶液扩散到植物根部的速度缓慢,而水稻根系吸收锌的速度却很快,结果会导致水稻缺锌。大多数深色土洼地具有很高的阳离子代换量(CEC),这种条件下水稻吸收锌的速度更快, Soil available zinc is affected by the interaction of soil, moisture, climate and field management factors. Clay and organic matter adsorption and chelation of zinc, with a high cation exchange capacity (CEC). In this soil, zinc diffuses slowly into the plant roots through the soil solution. However, the rate of zinc absorption in rice roots is very high, resulting in zinc deficiency in rice. Most dark earth depressions have a high CEC, under the conditions of rice absorption of zinc faster,