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Phosphorus accumulation and depletion in soils in wheat-maize cropping systems: Modeling and validation

文献类型： 外文期刊

作者： Ma, Yibing 1 ; Li, Jumei 1 ; Li, Xiuying 1 ; Tang, Xu 1 ; Liang, Yongchao 1 ; Huang, Shaomin 3 ; Wang, Boren 4 ; Liu, Hua 5 ;

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

2.CSIRO Land & Water, Glen Osmond, SA 5064, Australia

3.Henan Acad Agr Sci, Inst Soil & Fertilizer, Zhengzhou 450002, Henan, Peoples R China

4.Chinese Acad Agr Sci, Expt Stn Red Soil, Qiyang 426182, Hunan, Peoples R China

5.Xinjiang Acad Agr Sci, Inst Soil & Fertilizer, Urumqi 830000, Xinjinag, Peo

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： Long-term (over 15 years) winter wheat (Triticum aestivum L.)-maize (Zea mays L.) crop rotation experiments were conducted to investigate the accumulation of phosphorus (P) at five sites differing geographically and climatically in China. The results showed that, in soils without P added, the concentration of soil P extracted by 0.5molLp# NaHCO at pH 8.5 (Olsen-P) decreased with cultivation time until about 3mgkgp#, afterwards it remained constant. The trend of decrease in Olsen-P in soils withoutP added could be described by an exponential function of time. The concentration of Olsen-P in soils with P fertilizers increased with cultivation time and the model of accumulation of Olsen-P in soils could be described using P application rate, crop yield and soil pH. The accumulation rate of Olsen-P in the long-term wheat-maize crop rotation experiments was 1.21mgkgp# yearp# on average. If the target yield of wheat and maize is 10tonhap# in the soil with pH 8, the increasing rates of Olsen-P in soilsas estimated by the model will be 0.06, 0.36, 0.66, 0.95, 1.25 and 1.55mgkgp# yearp# when P application rates are 30, 40, 50, 60, 70 and 80kgPhap# yearp#, respectively. The models of accumulation of Olsen-P in soils were validated independently and could be used for the accurate prediction of accumulation rate of Olsen-P in soils with wheat-maize rotation systems. Also the application of the model was discussed for best management of soil P in agricultural production and environment protection.

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