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Phosphorus fertilizer management for high yields in intensive winter wheat-summer maize rotation system: Integrating phosphorus budget and soil available phosphorus

文献类型： 外文期刊

作者： Li, Shunjin 1 ; Chen, Xiuxiu 2 ; Wang, Zikai 1 ; Wu, Dongxun 1 ; Wang, Meng 3 ; Mueeller, Torsten 4 ; Zou, Chunqin 2 ; Chen, Xinping 1 ; Zhang, Wei 1 ;

作者机构： 1.Southwest Univ, Interdisciplinary Res Ctr Agr Green Dev Yangtze Ri, Key Lab Low carbon Green Agr Southwestern China, Coll Resources & Environm,Minist Agr & Rural Affai, Chongqing 400715, Peoples R China

2.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

3.Jilin Acad Agr Sci, Inst Agr Environm & Resources Res, Changchun 130033, Peoples R China

4.Univ Hohenheim, Inst Crop Sci, D-70593 Stuttgart, Germany

关键词： Soil P; P fractions; Environmental threshold; Crop yields; Balanced P fertilization

期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.6； 五年影响因子：6.1 ）

ISSN： 0378-4290

年卷期： 2024 年 313 卷

页码：

收录情况： SCI

摘要： Overuse of phosphorus (P) fertilizer in crop cultivation accelerates the consistent increase in soil P accumulation and increases the risk of P leaching from the agricultural system. The long-term implications of balanced P management on soil P availability and crop P uptake are still unknown. A three-year field experiment with six different P rates was conducted to determine the effect of a balanced P application strategy on crop yield, P uptake, soil P accumulation, and P transformation in a winter wheat-summer maize rotation system. The results found that the yield and P uptake of summer maize and wheat increased linearly with P fertilization up to 12.5 kg P ha-1, -1 , after which they stabilized, and the critical threshold is 50 kg P ha-1 -1 for winter wheat. The soil P budget under agronomic thresholds from 2017 to 2020 was observed as -2.99 to -11.04 kg P ha- 1 for maize but 15.1-24.5 kg P ha-1 -1 for wheat. Excessive P fertilization accelerated the downward movement of soil P and stocked it in the deep soil in the form of soil labile P and moderately labile P, increasing the risk of soil P leaching. The annual application of 600 kg ha-1 -1 P fertilizer substantially increased the total P concentration by 30%-99% from deep soil to topsoil compared to the no P treatment, while the 75 kg ha-1 -1 and 150 kg ha-1 -1 P fertilizer treatments did not affect soil P accumulation along the soil profile. Soil Olsen-P concentration to meet crop yield requirements is still far from meeting the critical environmental threshold of 47.6 mg kg-1 -1 and increased slightly by an annual 2.39 mg kg-1 -1 under the balanced P fertilization strategy. An annual negative soil P budget of 3-11 kg ha-1 -1 for summer maize could sustain optimal yields and P use efficiency. Winter wheat cultivation required additional P application to reach the agronomic threshold, set at 15-25 kg ha-1 -1 annually. In conclusion, balanced P fertilization can reduce soil P surplus and subsoil P stock while maintaining crop yields.

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