摘要
对湖南省株洲市樟树人工林不同坡向 (南、北坡 )林地 CO2 释放量进行定位观测 .结果表明 :樟树人工林林地 CO2 释放量一般是在 0 .0 40 6～ 0 .42 2 9g·m- 2 h- 1之间 ,平均值为 0 .2 669g·m- 2 h- 1 ,且呈一定的季节变化 ;坡向对林地 CO2 释放量的影响不明显 ;林地 CO2 释放量与各层土壤温度、含水量在一定范围内呈线性相关性 ;林地 CO2 释放量昼夜变化有一定规律性 .根据观测的林地 CO2 释放量日平均值计算得出 ,樟树人工林林地释放 CO2 通量估计范围为 13. 5 6～ 94.42 kg· hm- 2 d- 1 ,平均为61.78kg· hm- 2 d-
Located observation of the soil CO 2 release from different slopes in the artificial forests of Cinnamomum camphora (L.) Presl has been conducted in Zhuzhou, Hunan. Results show that the soil CO 2 release in such forests is in the range of 0.040 6～ 0.422 9 g·m 2 h 1 , the average value being 0.266 9 g·m 2 h 1 with a certain seasonal change; that the soil CO 2 release is the highest in summer and the lowest in the winter; that there is no significant difference of CO 2 release between the forests on different slopes; that the soil CO 2 release is of a positive linear correlation with the soil temperature and soil moisture at a certain range; and that the soil CO 2 release changes with a regular circadian rhythm. Based on the calculation of observed data, the soil CO 2 flux was in the range of 13.56～94.42 kg·hm 2 d 1 , and the average value, 61.78 kg·hm 2 d 1 .
出处
《中南林学院学报》
CSCD
2002年第1期11-16,共6页
Journal of Central South Forestry University
基金
国家重点野外台站资助项目
国家自然科学基金重大项目 ( 39899370 -0 1)
国家林业局重点科研项目 ( 96-34 )
湖南省科委重大项目 ( 99JZY10 0 4)资助
关键词
樟树人工林
林地
二氧化碳释放量
artificial forests of Cinnamomum camphora
forest soil
CO 2
release rate
