Response of soil nitrogen mineralization, nitrification, and denitrification to milk vetch (Astragalus sinicus L.) application in a paddy field

文献类型： 外文期刊

第一作者： Wang, Limin

作者： Wang, Limin;He, Chunmei;Liu, Cailing;Zheng, Xiangzhou;Yu, Juhua;Li, Qinghua;Huang, Yibin;Huang, Dongfeng;Wang, Fei

作者机构：

关键词： milk vetch; nitrogen mineralization; nitrification; chemical property; microbial community

期刊名称：CANADIAN JOURNAL OF SOIL SCIENCE （ 影响因子：1.5； 五年影响因子：1.6 ）

ISSN： 0008-4271

年卷期： 2025 年 105 卷

页码：

收录情况： SCI

摘要： We conducted incubation experiments with paddy soil collected from a long-term field experiment to explore the effect of Chinese milk vetch (Astragalus sinicus L., CMV) application on potential nitrogen (N) denitrification (PDA), nitrification (PNA), mineralization (PNM), soil chemical properties, microbial communities, enzyme activities, yields, and nutrient uptake of rice under different fertilization treatments. Five treatments were included: no chemical fertilizers (C-0), chemical fertilizers (C-100), Chinese milk vetch (M), CMV combined with 100% chemical fertilizers (MC100), and with 80% chemical fertilizers (MC80). Results showed that the M, MC100, and MC80 treatments significantly increased PNM and PNA compared with the C-100 treatment (P < 0.05). Meanwhile, the CMV application significantly increased total N, microbial biomass N, and carbon (C) concentrations, the abundances of the bacterial phylum Actinobacteria and the genera Bradyrhizobium, Mycobacterium, Streptomyces, and Reyranella, N-acetyl-glucosaminidase (NAG) activity, yields, and N nutrient uptake of rice grain compared with the C-100 treatment (P < 0.05). Correlation analyses indicated that grain yield and N uptake of rice, soil total N, microbial biomass C and N, the bacterial phylum Actinobacteria, the genera Bradyrhizobium, Mycobacterium, Streptomyces, Reyranella, and NAG were significantly correlated with PNM under different fertilization regimes, while microbial biomass C and N, Actinobacteria, Bradyrhizobium, and Reyranella were positively related to PNA (P < 0.05). Together, the application of CMV alone or in combination with chemical fertilizers can improve soil properties and rice growth, which may accelerate N mineralization and nitrification in this soil.

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