Effect of Soil Acidification on Temperature Sensitivity of Soil Respiration

文献类型： 外文期刊

第一作者： Jin, Lin

作者： Jin, Lin;Hua, Keke;Zhan, Linchuan;He, Chuanlong;Wang, Daozhong;Guo, Zhibin;Jin, Lin;Hua, Keke;Zhan, Linchuan;He, Chuanlong;Wang, Daozhong;Guo, Zhibin;Nagano, Hirohiko;Cheng, Weiguo;Inubushi, Kazuyuki

作者机构：

关键词： soil pH; warming; Q(10) of soil respiration; soil microbial biomass; microbial community composition; alpha diversity

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2024 年 14 卷 5 期

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收录情况： SCI

摘要： Soil pH significantly impacts microbial activity and community assembly, which in turn determines the temperature sensitivity (Q(10)) of soil respiration. Due to the high soil acidification in China, it is necessary to understand how soil acidification impacts Q(10). Here, the Q(10) of soil respiration was examined in a long-term field experiment (1982-present) with different soil pH caused by fertilization management. In this experiment, we selected treatments with neutral pH: (1) no crops and fertilization (CK); (2) crops without fertilization (NF); low pH with (3) crops with chemical fertilization (NPK); and (4) crops with chemical fertilization combined with wheat straw incorporation (WS). Under natural soil temperature changes, we observed that soil acidification lowered the Q(10) value of soil respiration. Considering only temperature changes, the Q(10) of soil respiration was strongly associated with microbial community composition, alpha diversity, and soil ammonium nitrogen. Considering the interaction between soil pH and temperature, warming strengthened the negative effect of soil pH on the Q(10) of soil respiration, and the pathway through which soil pH mediated Q(10) included not only microbial community composition, alpha diversity, and biomass but also the soil's available phosphorus. This work enhanced our insights into the relationships between Q(10), temperature, and soil pH by identifying important microbial properties and key soil environmental factors.

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