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Long-Term Application of Chinese Milk Vetch Return to Soil Alters Phosphorus forms Associated with Aggregates

文献类型： 外文期刊

作者： Wang, Hui 1 ; Tang, Shan 1 ; Han, Shang 1 ; Cheng, Wenlong 1 ; Bu, Rongyan 1 ; Li, Min 1 ; Ji, Wu 1 ; Cao, Weidong 2 ;

作者机构： 1.Anhui Acad Agr Sci, Inst Soil & Fertilizer, Anhui Prov Key Lab Nutrient Cycling Resources & En, Hefei 230031, Peoples R China

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, 12,Zhongguancun Nandajie St, Beijing 100081, Peoples R China

关键词： Chinese milk vetch; Paddy soil; Soil aggregate; Phosphorus availability; Phosphorus species

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.9； 五年影响因子：3.9 ）

ISSN： 0718-9508

年卷期： 2024 年 24 卷 1 期

页码：

收录情况： SCI

摘要： Chinese milk vetch (MV) as green manure is utilized to improve rice yield and soil fertility in China. However, the long-term effects of MV on the distribution and speciation of phosphorus (P) in soil aggregates are poorly understood. We conducted a 12-year field experiment in a double-rice cropping system, with four treatments: (1) no chemical fertilizer and no MV (CK); (2) 100% of chemical fertilizer (F1); (3) 70% of chemical fertilizer (F2); and (4) 70% of chemical fertilizer and MV (F2M). We analyzed the contents and forms of P in soil aggregates, and explored the mechanisms underlying the relationships among MV, chemical fertilizer, and P forms in paddy soil. The application of MV increased the proportion of > 2 mm soil aggregates and improved the stability of soil aggregates. Compared with F2, MV applied improved the P content and storage in > 2 mm aggregates and increased the available P (AP) in all soil aggregates. Application of MV significantly increased NaHCO3-P (NaHCO3-Pi and NaHCO3-Po) and decreased residue-P (Res-P), and there was a negative correlation between Res-P and MV in all aggregates. Furthermore, MV influenced the P forms by affecting the amount of soil organic matter, total nitrogen and total P in soil aggregates. Although chemical fertilizer input more strongly affected P forms than did MV, the application of MV decreased Res-P. Therefore, co-incorporation of MV and chemical fertilizer improved the distribution of aggregates and increased the availability and supply of P in the double-rice-MV cropping system.

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