Responses of Soil Enzyme Activity to Long-Term Nitrogen Enrichment andWater Addition in a Typical Steppe

文献类型： 外文期刊

第一作者： Zhang, Jinbao

作者： Zhang, Jinbao;Luo, Yonghong;Du, Lan;Tian, Ru;Wang, Shan;Shen, Yan;Zhang, Jiatao;Li, Na;Shao, Wenqian;Xu, Zhuwen;Zhang, Jinbao;Jin, Ke

作者机构：

关键词： acid phosphatase; beta-1,4-glucosidase; climate change; temperate grassland; nitrogen deposition; precipitation

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 7 期

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收录情况： SCI

摘要： Enzyme activity plays an important role in soil biochemical processes and is a key factor driving nutrient cycling. Although a great number of studies examined the effects of nitrogen (N) enrichment and water (W) addition on soil enzyme activity, most of them focused on the effect of only one resource and are based on short-term investigations. The separate and interactive effects of long-term changes in nitrogen and water on soil enzyme activity remain largely unexplored. In this study, we demonstrated the responses of two types of soil enzyme, beta-1,4-glucosidase (BG) and acid phosphatase (APA), to increased nitrogen and water based on a 16-year experiment conducted in a typical grassland in northern China. The results show that: (1) nitrogen addition inhibited BG and APA in 2019 and 2020; (2) water addition had no significant effect on BG activity, but significantly reduced APA activity in 2020; and (3) redundancy analysis (RDA) showed that nitrogen and water addition affected soil enzyme activity mainly by affecting soil microbial biomass carbon (MBC). The present research offers a comprehensive explanation of how atmospheric nitrogen deposition and precipitation patterns affect the characteristics of microorganisms and the cycling of nutrients in grassland ecosystems.

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