森林土壤呼吸及其主要调控因素研究进展

发布时间：2018-09-13 11:38

【摘要】：随着大气CO_2浓度的升高,全球变暖的趋势日益加剧,成为全球高度关注的生态环境问题。土壤是森林生态系统最大的CO_2排放源,了解土壤呼吸的变化特征及影响机制,对于缓解全球变暖具有重要意义。森林土壤呼吸作为一个复杂的生态学过程,受人类活动、森林类型、温度、水分、土壤生物和土壤理化性质等因素的调控,特别是土壤呼吸对温度的敏感性存在时间和空间上的较大变异。综述了国内外森林土壤呼吸研究现状及发展趋势,揭示森林土壤呼吸时空变化特征、温度的敏感性及其主要影响因子(土壤温度、土壤湿度、森林植被覆盖、土壤微生物、pH值、土壤氮素、土壤磷素、施肥、森林砍伐及刀耕火种等),阐明了森林土壤呼吸的生态过程、时空变化规律及其影响机制,有助于完整、准确地理解森林在地区和全球碳循环中的地位与作用,能够为预测未来全球变化趋势提供理论支撑。
[Abstract]:With the increase of atmospheric CO_2 concentration, the trend of global warming is becoming more and more serious. Soil is the largest CO_2 emission source in forest ecosystem. It is very important to understand the characteristics of soil respiration and its influence mechanism to mitigate global warming. Forest soil respiration, as a complex ecological process, is regulated by human activities, forest types, temperature, water, soil biological and physical and chemical properties, etc. In particular, the sensitivity of soil respiration to temperature varies greatly in time and space. The present situation and development trend of forest soil respiration at home and abroad were reviewed. The spatio-temporal variation characteristics of forest soil respiration, the sensitivity of temperature and its main influencing factors (soil temperature, soil moisture, forest vegetation cover, soil microbial pH value) were revealed. Soil nitrogen, soil phosphorus, fertilization, deforestation and slash-and-burn, etc.), the ecological process of forest soil respiration, the regularity of temporal and spatial changes and its influencing mechanism are expounded, which is helpful to the integrity of forest soil respiration. An accurate understanding of the position and role of forests in the regional and global carbon cycles can provide theoretical support for predicting future trends of global change.
【作者单位】：西南林业大学环境科学与工程学院;
【基金】：国家自然科学基金项目(41461052) 国家林业局948项目(2015-4-39) 云南省高校优势特色重点学科(生态学)建设项目
【分类号】：S714.3

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