数字农科院2.0

Shifts in microorganisms lead to double peaks in manure-induced temperature sensitivity of soil organic carbon degradation with incubation time

文献类型： 外文期刊

作者： Xiaodong Sun; Yikang Xue; Yu’e Li; Kailou Liu; Wenju Zhang; Minggang Xu; Andong Caia

关键词： Soil organic carbon; Temperature sensitivity; Manure application; Soil microorganisms; Agroecosystems Warming

期刊名称： SOIL & TILLAGE RESEARCH

ISSN： 0167-1987

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： The temperature sensitivity (Q10) of soil organic carbon (SOC) degradation is a critical parameter in SOC response models concerning climate warming, governing both the direction and magnitude of SOC-climate feedback. The application of manure is an important management practice for controlling Q10 in agroecosystems. Despite its great significance, the response of Q10 to long-term manure application and its potential regulatory mechanisms remain unclear, leading to substantial uncertainties in the prediction of SOC-climate feedback. In this study, we integrated 526 paired global data from long-term manure application experiments (>5 years). This was complemented by two years of in-situ monitoring and 426 days of laboratory incubation based on a 36-year manure application experiment, with all data supporting that the application of manure significantly increased Q10. Based on this global meta-analysis, the application of manure resulted in a Q10 value of 1.83, which was an increase of 4.84 % compared with the control. Double Q10 peaks were observed in the bulk soil and aggregates under manure application with incubation time, occurring in the early (around the 28th day) and late (around the 321st day) stages of incubation. In addition to the roles of SOC quality and quantity, there was a shift in the first peak of Q10 from the dominance of bacteria, invertase, and α-glucosidases to fungi, β-glucosidase, and cellobiohydrolase in the second peak. These results highlighted that manure-induced Q10 increased in agroecosystems; thus its various drivers at different stages of SOC degradation should be considered in Earth system models for accurate prediction of SOC dynamics and their feedback to global climate change.

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