数字农科院2.0

Predictive Model for Phosphorus Accumulation in Paddy Soils with Long-Term Inorganic Fertilization

文献类型： 外文期刊

作者： Li, J. M.;Liu, J.;Xu, M. G.;Ma, Y. B.;Li, J. M.;Gao, J. S.

作者机构：

关键词： Accumulation;long-term;paddy soil;phosphorus;rice

期刊名称： COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS

ISSN： 0010-3624

年卷期： 2012 年 43 卷 13 期

页码：

收录情况： SCI

摘要： Prediction of accumulation of available phosphorus (P) in paddy soils is crucial for the best management of P fertilizers. Based on the long-term double-rice rotation systems, a predictive model for accumulation rates of Olsen P in paddy soils with chemical fertilization was developed. In paddy soils with more than 40 kg applied P ha(-1), the accumulation of Olsen P in the soils could occur. With the target rice yield of 10 tons ha(-1) per year, the increases in Olsen P in paddy soils were estimated by the model as 0.7, 2.2, and 3.8 mg kg(-1) when P application rates are 40, 60, and 80 kg P ha(-1), respectively. The accumulation rate of Olsen P was relatively high in paddy soils. The predictive model can be used to predict accurately the concentrations of Olsen P in paddy soils based on initial Olsen P, P application rate, and crop yield and to optimize P fertilization for rice crop production and environmental protection.

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