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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. 1 ; Gao, J. S. 3 ; Liu, J. 1 ; Xu, M. G. 1 ; Ma, Y. B. 1 ;

作者机构: 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Plant Nutr & Nutrient Cycling, Beijing 100081, Peoples R China

2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Jiangsu, Peoples R China

3.Chinese Acad Agr Sci, Expt Stn Red Soil, Qiyang, Hunan, Peoples R China

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

期刊名称:COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS ( 影响因子:1.327; 五年影响因子:1.315 )

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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