论文部分内容阅读
森林土壤是大气CO_2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CO_2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。
Forest soil is an important source of atmospheric CO 2 emissions. Anthropogenic measures such as fertilization, harvesting, burning, understory vegetation management and changes in land use change soil physical and chemical properties and soil microclimate, significantly affecting the production and emission of CO 2 in forest soils. However, due to the differences in forest types, soil conditions, geographical differences and climatic factors, the influence of anthropogenic disturbance on soil respiration can promote, reduce or not change the soil respiration Different conclusions. Based on a brief analysis of the literature that affected soil respiration in forest soils, the paper mainly discussed the changes of fertilization, harvesting, burning, understory vegetation management and land use patterns on the basis of a brief analysis of the natural factors affecting soil respiration (soil temperature and water content) And other human factors on forest soil respiration, the system reveals the mechanism of anthropogenic interference on forest soil respiration and explores the research directions that need to be strengthened in the future in order to learn from the reasonable and sustainable management of forest land in China under the background of climate change And the role of inspiration.