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本文对江汉平原四湖地区几个不同潜育度水稻土剖面的磷素状况及其有效性进行了研究 ,并用张守敬—Jakson无机磷分级法做无机磷分级。结果表明 ,土壤潜育化程度对土壤全磷没有明显的影响 ,对土壤磷素形态及其有效性有明显的影响。随着土壤潜育化程度加重 ,无机磷中的O—P含量有增加趋势 ,其占土壤无机磷的百分数增大 ;土壤有机磷也随之增加 ;但有效磷含量减少。潜育化状况对土壤磷素形态与有效性的影响与土壤有机质和还原状况有关
In this paper, the status and availability of phosphorus in paddy soils with different subsurface potentials in the Sihu area of Jianghan Plain were studied. Inorganic phosphorus was classified by Zhang Shoujing-Jakson inorganic phosphorus fractionation. The results showed that the degree of soil gleization had no obvious effect on soil total phosphorus, but had obvious effect on the soil phosphorus form and its availability. With the deepening of soil gleization, the content of O-P in inorganic phosphorus tends to increase, and the percentage of inorganic phosphorus in soil increases; the content of organic phosphorus in soil also increases, but the content of available phosphorus decreases. The effect of gleaming status on soil phosphorus forms and availability is related to soil organic matter and reduction status