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Journal of Plant Ecology >

2024 , Vol. 17 >Issue 6: 1 - rtae065

DOI: https://doi.org/10.1093/jpe/rtae065

Research Articles

Effects of leguminous green manure–crop rotation on soil enzyme activity and stoichiometry

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  • 1 Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    2 College of Forestry, Henan Agricultural University, Zhengzhou 450002, China

    3 College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China
    4 Alliance of Biodiversity International and CIAT, Beijing Office, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    5 Research Centre Bioversity International, 00054 Maccarese (Fiumicino), Italy
    6 Institute of Microbiology of the Academy of Sciences, Tashkent 100128, Uzbekistan
    7 Research Institute of Environment and Nature Conservation Technologies of the Ministry of Ecology, Environmental Protection, and Climate Change of the Republic of Uzbekistan, Tashkent 100043, Uzbekistan

    *Corresponding author. E-mail: zhangximei@caas.cn

Received date: 2024-03-07

  Accepted date: 2024-07-08

  Online published: 2024-07-26

Supported by

Our study was supported by the National Natural Science Foundation of China (U21A20188, 32071547), Double Thousand Plan of Jiangxi Province (jxsq2023102216), The Top Notch Young Talents Program (to X.Z.) of China and the Agricultural Science and Technology Innovation Program (to X.Z.). Conflict of interest statement. The authors declare thatthey have no conflict of interest.

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Abstract

As a crucial strategy for sustainable agricultural production, green manure–crop rotation can regulate soil nutrient cycling and decrease the reliance on nitrogen fertilizers. However, we still lack a comprehensive understanding of the changes in soil eco-enzyme activities, microbial metabolism and nutrient limitations caused by leguminous green manure–crop rotation. Here, we conducted field experiments of leguminous green manure–crop rotation across China to analyze soil extracellular enzyme activities, specifically β-glucosidase (BG), N-acetyl-β-d-glucosaminidase (NAG), leucine aminopeptidase (LAP) and acid phosphatase (AP). The study revealed that long-term green manure–crop rotation increased carbon and nitrogen accumulation in farmland, with a significant average increase of 20.1% and 36.4% in BG, AP enzyme activities in topsoil, while showing a decrease in ln(NAG + LAP):ln(AP) ratios. The ratios of ln(BG):ln(NAG + LAP) and ln(NAG + LAP):ln(AP) in soil across various regions were typically below 1:1, indicating that soil microbial activity is more constrained by nitrogen and phosphorus nutrients rather than by carbon. Precipitation, temperature, soil total carbon (TC) and total nitrogen (TN) were identified as key environmental factors for extracellular enzyme activities and stoichiometric ratios. Our study highlights that the green manure–crop rotation alleviates nitrogen limitation while enhancing phosphorus limitation, and is closely related to the accumulation of TC and TN in the soil.

Key words： green manure; crop rotation; soil extracellular enzyme activity; stoichiometric ratio; nutrient

Cite this article

Meixia Liu, Zonghao Hu, Yi Fan, Bin Hua, Wei Yang, Shuang Pang, Rong Mao, Yang Zhang, Keyu Bai, Carlo Fadda, Paola De Santis, Nadia Bergamini, Aziza Usmankulova, Buriyev Salimjan Samedjanovich and Ximei Zhang . Effects of leguminous green manure–crop rotation on soil enzyme activity and stoichiometry[J]. Journal of Plant Ecology, 2024 , 17(6) : 1 -rtae065 . DOI: 10.1093/jpe/rtae065

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