Long‐term mowing regulates the responses of above‐ and below‐ground net primary productivity stability to water and nitrogen addition in a temperate steppe

作者：Jun Sheng, Pengshuai Shao, Meng Zhou, Fengfeng Cao, Yumeng Guo, Yujia Yuan, Guangyuan Yuan, Zuoqing Jiang, Wenhao Zhang, Wenming Bai · 发表于：Functional Ecology · 年份：2025 · DOI：10.1111/1365-2435.70205 · 被引用次数：2 · 研究领域：Remote Sensing in Agriculture、Plant Water Relations and Carbon Dynamics、Ecology and Vegetation Dynamics Studies

Abstract Global change, including atmospheric nitrogen (N) deposition, shifts in precipitation patterns, and anthropogenic activities such as mowing, have great impacts on the structure and functions of grassland ecosystems. However, whether and how the N deposition, change in precipitation and long‐term mowing influence the stability of above‐ and below‐ground net primary productivity of grassland ecosystems remain unexplored. Here, we investigated the effects of N addition and water addition on the stability of above‐ground net primary productivity (ANPP) and below‐ground net primary productivity (BNPP), and explored the driving factors in a 19‐year water addition and N addition experiment under the long‐term‐mowing and no‐mowing regimes in a temperate steppe in Inner Mongolia. Long‐term mowing weakened the positive effect of water addition on ANPP stability by dampening the effect of water addition on species asynchrony, and altered the effect of N addition on ANPP stability from neutral to negative by exacerbating the negative impact of N addition on species asynchrony. By contrast, long‐term mowing enhanced the positive effects of water addition and N addition on BNPP stability by strengthening the effects of water addition and N addition on grass ANPP, which subsequently decreased the standard deviation (SD) of BNPP. Under the long‐term‐mowing regime, water addition directly enhanced ANPP stability, whereas N addition reduced ANPP stability by decreasing species asynchr...