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Transformation of Soil Accumulated Phosphorus and Its Driving Factors across Chinese Cropping Systems

文献类型： 外文期刊

作者： Chen, Yanhua 1 ; Guo, Ning 3 ; He, Wentian 2 ; Abbasi, Naeem A. 4 ; Ren, Yi 5 ; Qu, Xiaolin 5 ; Zhang, Shuxiang 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resource & Reg Planning, Beijing 100081, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Plant Nutr Resource & Environm, Beijing 100097, Peoples R China

3.Beijing Cultivated Land Construct & Protect Ctr, Beijing 100029, Peoples R China

4.McGill Univ, Dept Bioresource Engn, Sainte Anne De Bellevue, PQ H9X 3V9, Canada

5.Minist Agr & Rural Affairs, Cultivated Land Qual Monitoring & Protect Ctr, Beijing 100125, Peoples R China

关键词： soil Olsen-P content; soil P surplus; soil P transformation efficiency; driving factors; cropping systems

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2023 年 13 卷 4 期

页码：

收录情况： SCI

摘要： Understanding the transformation of accumulated phosphorus (P) is vital for P management. However, previous studies are limited to a few sites in Chinese agroecosystems. In this study, to investigate the temporal-spatial differences of transformation from accumulated P to available P (determined by the Olsen method), a dataset was assembled based on 91 national long-term experimental sites across China in the recent 31 years (1988-2018). A boosted regression tree (BRT) and a structural equation model (SEM) were used to analyze the factors influencing the transformation. The results showed that the transformation from accumulated P to available P in South China (1.97 mg kg(-1)) was significantly higher than that in other regions (0.69-1.22 mg kg(-1)). Soil properties were the main driving factors with a relative contribution of 81.8%, while climate and management practices explained 7.8% and 10.4% of the variations, respectively. Furthermore, SEM analysis revealed that the soil organic matter (SOM) could positively and directly affect the transformation, whereas the soil pH, soil silt content, and P fertilizer had negative and direct effects on it. For the first time, this study analyzed the transformation from soil accumulated P to available P at a national scale and at multiple sites and quantified the contribution of the main influencing factors. These results help to predict the soil available P content across different agroecosystems based on the input amount of P fertilizer, contributing to the regional precise management of P fertilizer application.

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