摘要
土壤是陆地生态系统最大的碳源,也是最大的碳汇。土壤呼吸作为全球碳循环的一个重要组成部分,是调控全球碳循环和气候变化的关键过程,也是当前全球变化生态学研究的重要领域和碳循环中碳收支研究中的一个热点问题。水分是土壤呼吸的重要扰动因子,比较不同来源土壤水分对土壤呼吸的影响,对准确估算土壤呼吸具有重要意义,这在干旱和半干旱地区尤为明显。通过土壤水分的3种主要来源:降水、灌溉和地下水,比较分析了土壤呼吸对不同来源水分的响应过程和规律,为今后土壤呼吸方面的研究提供参考。
The largest carbon source and carbon sink of terrestrial ecosystems is soil.Soil respiration is an important component of global carbon cycle,and also a key process of regulating and controlling global carbon cycle and climate change.Moreover,it is an important issue of carbon budget in carbon cycle and a crucial field in global change ecology.Since soil moisture is an important disturbance to soil respiration,it is necessary to study the effects of soil moisture from different sources on soil respiration so as to accurately estimate soil respiration,especially in arid and semiarid regions.In this paper,the responses of soil respiration to soil moisture from different sources including precipitation,irrigation and groundwater as well as the processes of soil respiration were compared and analyzed.The results could be referred in further study on soil respiration in the future.
出处
《干旱区研究》
CSCD
北大核心
2012年第6期1014-1021,共8页
Arid Zone Research
基金
国家自然科学基金重点项目(91025002)
国家杰出青年基金项目(40725001)
关键词
降水
灌溉
地下水
土壤呼吸
碳循环
研究进展
precipitation
irrigation
groundwater
soil respiration
carbon cycle
research progress
