摘要
利用静态箱/气相色谱法对成都平原蔬菜地土壤-作物系统CO2的排放通量变化进行了观测,并分析了作物系统CO2排放速率与环境因子间的关系。多元逐步回归及单因子分析结果表明:施氮与不施氮处理的CO2排放速率与地下5 cm处土壤温度呈极显著正相关,土壤温度是影响蔬菜地CO2排放的主导因子;二者的Q10值分别为3.67和3.55。
CO2 flux of emission from soil-vegetable system was measured by static chamber-gas chromatographic techniques in the Chengdu plain of Sichuan Basin, and the relationships were analyzed between CO2 flux and environmental factors. Results showed that soil respiration increased exponentially with increasing soil temperature at the depth of 5 cm and the soil temperature was the dominant factor. The relationship was described with the Q10model, which represented the sensitivity of soil respiration to temperature.
出处
《生态环境》
CSCD
北大核心
2006年第1期71-73,共3页
Ecology and Environmnet
基金
国家自然科学基金重点项目(40331014)
中国科学院知识创新工程项目(KZCX-SW-01-01B)
