摘要
贵州喀斯特地区土壤表层CO2 释放通量最高和最低分别出现在夏季和冬季。影响土壤表层CO2 释放通量的最基本因素是温度和土壤湿度 ;湿度对土壤表层CO2 释放通量的影响在温度大于 2 0℃时特别显著。温度和湿度对土壤表层CO2 释放通量的影响主要是借助于冷热交替及干湿循环下土壤微生物生物量碳、可溶性有机碳向土壤表层CO2 释放通量转化来实现的。
The highest and lowest soil surface CO 2 flux occurs in summer and winter, respectively, in the Guizhou Karst areas.The primary factors that influence soil surface CO 2 flux are temperature and soil moisture. The latter plays a more significant role when temperature is above 20 ℃. Temperature and soil moisture influence the soil surface CO 2 flux by hot-cold cycles and moist-dry cycles under which soil microbial biomass carbon and soil soluble organic carbon can be transformed into soil surface CO 2.
出处
《生态学杂志》
CAS
CSCD
北大核心
2004年第2期73-75,共3页
Chinese Journal of Ecology
基金
国家自然科学基金项目 ( 4 0 3 0 3 0 12 )
国家自然科学基金资助项目( 4 9672 173 )
