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作 者 ：骆土寿,陈步峰,李意德,林明献,周光益,陈德祥,邱坚锐

期 刊 ：生态学报 2001年 21卷 12期 页码：2013~2017

关键词：热带山地雨林；土壤呼吸；凋落物CO2排放速率；CO2排放节律；

Keywords:tropical mountain rain forest, soil respiration, CO 2-release rate,

摘 要 ：采用 CI-30 1 PS红外 CO2 测定系统对海南岛尖峰岭热带山地雨林土壤和凋落物的呼吸进行测定结果表明 ,原始林土壤呼吸速率昼夜变化表现为多峰曲线 ,最高峰在 2 0 :0 0 ,在 1 2 :0 0和 4 :0 0～ 6 :0 0出现 2个次高峰 ,平均呼吸速率为1 0 .6 85 3μmol· m- 2· s- 1;更新林土壤呼吸速率变化大 ,平均为 1 4 .75 36 μmol· m- 2· s- 1,高峰主要在 1 3:0 0和 2 :0 0 ;凋落物分解过程在林地 CO2 排放总量中贡献很少 ,仅占 1 .74 1 %～ 2 .831 % ;原始林凋落物 CO2 排放量明显比更新林大 ,而各层的排放比例不一样 ,原始林是 b层 (半分解凋落物及腐殖质层 ) >a层 (未分解凋落物层 ) ,更新林是 b层

Abstract:Litter respiration and soil respiration were measured in a tropical mountain rain forest in Jianfengling,Hainan Island.The results were as follows:diurnal changes in soil respiration in virgin forest showed multi-peaks and the highest peak appeared at 8:00.Respiration and temperature of soil both reached lower peaks at 12:00 and during 4:00～6:00 respectively,with a mean respiratory rate of 10.7μmol·m -2·s -1.In regeneration forest,respiratory rates of soil reached peaks with a mean value of 14.8μmol·m...

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