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本文用连续分级浸提法，研究了早改水对砂姜黑土中锌的含量、赋存形态和有效性的影响。砂姜黑土中的锌绝大部分以残留态存在，晶形铁结合态约占１０％，其余形态锌一般小于３％。这些形态锌可以分为三类：一类为土壤锌的强度因子，即代换态锌；另一类是土壤锌的容量因子，即有机态、无定形铁结合态和晶形铁结合态锌；第三类为残留态锌。土壤中有效态锌主要来自代换态。旱改水后，晶形铁结合态锌向有机态和无定形铁结合态锌转化，使得土壤中锌的活动性提高，增加了土壤中锌遭受淋溶损失的机率，从而导致土壤中全锌和有效态锌含量降低。
In this paper, the continuous grading extraction method was used to study the effects of earlier water changes on the zinc content, occurrence morphology and availability in Shajiang black soil. Most of the zinc in saprolite black soil exists in the residual state, the crystalline form of iron bound state accounts for about 10%, while the remaining forms of zinc are generally less than 3%. These forms of zinc can be divided into three categories: one is the strength factor of soil zinc, that is, substitutional zinc; the other is the capacity factor of soil zinc, namely organic, amorphous iron bound and crystalline iron bound zinc; The third category is residual zinc. The available zinc in soils mainly comes from substitution. After the drought and water reforming, crystalline form of iron bound zinc transformed into organic and amorphous iron bound zinc, which increased the activity of zinc in soil and increased the chance of zinc leaching loss in soil, Effective zinc content decreased.