环境因子对矿质土壤呼吸影响的研究进展

doi:10.13287/j.1001-9332.202310.015

摘要/Abstract

摘要： 矿质土壤呼吸是土壤碳库向大气排放CO₂的重要通道,在调节陆地生态系统碳循环方面发挥着关键作用,对土壤温度、土壤湿度和底物有效性等环境因子有较高的敏感性。环境因子的变化会影响矿质土壤呼吸及其温度敏感性,从而改变全球碳平衡。本文综述了环境因子对矿质土壤呼吸及其温度敏感性的影响研究成果,发现在不同生态系统中环境因子对矿质土壤呼吸及其温度敏感性的影响具有显著差异,指出环境因子能够直接影响矿质土壤呼吸及其温度敏感性,同时也能通过影响土壤微生物生物量和群落结构、胞外酶活性和土壤孔隙度等对矿质土壤呼吸及其温度敏感性产生间接影响。基于综述结果,提出了以后的研究展望:1)结合多种观测技术和方法研究环境因子对矿质土壤呼吸的影响;2)探究多种环境因子的交互作用对矿质土壤呼吸的影响;3)在不同时间和空间尺度上开展环境因子对矿质土壤呼吸影响的研究;4)完善矿质土壤呼吸及其温度敏感性的预测模型;5)加强新近光合产物的底物供应对矿质土壤呼吸及其温度敏感性调控作用的研究。

关键词: 环境因子, 矿质土壤呼吸, 底物有效性, 温度敏感性, 大分子速率理论

Abstract: Mineral soil respiration, a major component of CO₂ emissions from soil to atmosphere, plays a critical role in driving terrestrial ecosystem carbon cycling and is highly sensitive to environmental changes, including soil temperature, soil moisture, and substrate availability. The changes of environmental factors can affect mineral soil respiration and its temperature sensitivity thereby alters global carbon balance. We reviewed studies on the effects of environmental factors on mineral soil respiration and its temperature sensitivity. The effect of environmental factors on mineral soil respiration and its temperature sensitivity significantly differed among ecosystems. Environmental factors directly and indirectly affect mineral soil respiration and its temperature sensitivity by altering soil microbial biomass and community structure, extracellular enzyme activity, and soil porosity. Based on the results of this review, we suggested: 1) combining multiple observation techniques and methods to study the effects of environmental factors on mineral soil respiration; 2) exploring the interactive effects of multiple environmental factors on mineral soil respiration; 3) carrying out experiments on mineral soil respiration at different temporal and spatial scales; 4) improving the prediction model of mineral soil respiration and its temperature sensitivity; 5) streng-thening the role of substrate supply of recent photosynthates in the regulation of mineral soil respiration and its temperature sensitivity.

Key words: environmental factor, mineral soil respiration, substrate availability, temperature sensitivity, macromolecular rate theory

刘源豪, 杜旭龙, 黄锦学, 熊德成. 环境因子对矿质土壤呼吸影响的研究进展[J]. 应用生态学报, 2023, 34(10): 2835-2844.

LIU Yuanhao, DU Xulong, HUANG Jinxue, XIONG Decheng. Effect of environmental factors on mineral soil respiration: A review[J]. Chinese Journal of Applied Ecology, 2023, 34(10): 2835-2844.

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