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Validation of a soil phosphorus accumulation model in the wheat-maize rotation production areas of China

文献类型： 外文期刊

作者： Wang, Bin 1 ; Li, Jumei 1 ; Ren, Yi 3 ; Xin, Jingshu 3 ; Hao, Xiying 4 ; Ma, Yibing 1 ; Ma, Xingwang 2 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Soil Fertil & Fertilizer Effects Long Term M, Beijing 100081, Peoples R China

2.Xinjiang Acad Agr Sci, Key Lab Oasis Nutrient & Efficient Utilizat Water, Inst Soil Fertilizer & Agr Water Saving, Urumqi 830091, Peoples R China

3.Natl Ctr Agr Technol Extens & Serv, Beijing 100026, Peoples R China

4.Agr & Agri Food Canada, Lethbridge Res Ctr, Lethbridge, AB T1J 4B1, Canada

关键词： Accumulation;Model validation;Olsen-P;Wheat-maize rotation

期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.224； 五年影响因子：6.19 ）

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收录情况： SCI

摘要： A model for Olsen-P (extracted by 0.5 mol L-1 NaHCO3 at pH 8.5) accumulation in soils, established using several experimental field sites, has not been validated by a large scale dataset. In the present study, a long-term (maximally 24 years), large-scale, regional soil monitoring dataset consisting of 58 sites from four provinces (Hebei, Henan, Shandong and Shanxi) of the main wheat (Triticum aestivum L.)-maize (Zea mays L.) rotation production areas in China was used to validate the developed model for Olsen-P accumulation in soils for both inorganic and organic P fertilization. The results showed that with fertilizer P application rates of 56.3-103 kg P ha(-1), total wheat-maize yields between 123 and 13.1 t ha(-1) were obtained with net gains of 21.7-77.9 kg P ha(-1) yr(-1) in the soils in these areas. The accumulation of Olsen-P in the P-fertilized soils above the initial soil Olsen-P contents could be predicted by fertilizer P application rates (including organic and inorganic P sources), crop yields and soil pH. According to the model, the mean accumulation rate of Olsen-P in the main wheat-maize rotation areas of China was 1.29 mg kg(-1) yr(-1), which was close to the measured mean value of 1.14 mg kg(-1) y(-1). The soil Olsen-P accumulation model could provide a valuable predictive tool, decreasing the frequency of Olsen-P monitoring in soils and improving soil phosphorus management for both agricultural production and environmental protection. (c) 2015 Elsevier B.V. All rights reserved.

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