森林土壤呼吸对人为干扰因素的响应

森林土壤是大气CO₂重要的排放源。施肥、采伐、火烧、林下植被管理和土地利用方式改变等人为措施改变了土壤理化性质和土壤微气候,显著影响森林土壤CO₂的产生与排放。人为干扰对森林土壤呼吸的影响已积累了丰富的研究结果,但因森林类型、土壤状况、地域差异以及气候因素的不同,即使同一种干扰因素对土壤呼吸的影响也存在促进、降低或者未改变等不同的结论。论文利用相关论文数据库查询森林土壤呼吸的文献,在简要分析影响森林土壤呼吸自然因素（土壤温度、含水量）的基础上,重点论述了施肥、采伐、火烧、林下植被管理以及土地利用方式改变等人为因素对森林土壤呼吸的影响,系统揭示了人为干扰对森林土壤呼吸影响的作用机制,并探讨今后需要加强的研究方向,以期为气候变化背景下我国林地的合理、可持续经营起到借鉴和启示的作用。

Responses of Forest Soil Respiration to Human Disturbance

Forest soil is the main source of atmospheric CO₂. Human disturbance (fertilization, cutting, burning, undergrowth management and land use change) would react on soil properties and soil micro climate, and thus significantly affect the production and CO₂ emission of forest soil. A great deal of research on the influence of human disturbance on forest soil respiration had been accumulated. Human disturbance would stimulate, suppress, or show no effect on soil respiration, depending on forest type, soil conditions, and regional environment and climate factors. In this study, publications relevant to forest soil respiration in bibliographic databases were used. This study briefly described the influence of natural factors (soil temperature, soil moisture) and human disturbances on forest soils respiration, and then systematically explained the response of soil respiration to the human disturbances and associated mechanisms. We pointed out some urgent and key directions in future in order to provide some references and enlightenments for forest management practices under the background of climate change.