长白山阔叶红松林生态系统的呼吸速率

被引:16
作者
王淼 [1 ]
刘亚琴 [2 ]
郝占庆 [1 ]
王跃思 [3 ]
机构
[1] 中国科学院沈阳应用生态研究所
[2] 辽东学院
[3] 中国科学院大气物理研究所
关键词
叶呼吸; 枝干呼吸; 土壤呼吸; 小气候; 阔叶红松林森林生态系统;
D O I
10.13287/j.1001-9332.2006.0354
中图分类号
S718.5 [森林生态学];
学科分类号
071012 ; 0713 ;
摘要
利用Li-6400便携式CO2分析系统测定长白山原始阔叶红松林生态系统土壤呼吸、乔灌木的枝干呼吸和叶呼吸;同步监测森林小气候气象因子;建立土壤、树干、叶与环境因子间的模型.根据阔叶红松林植被群落的特性,估算阔叶红松林生态系统不同组分呼吸速率.结果表明,阔叶红松林生态系统呼吸具有明显的成熟林特征,生态系统总呼吸量为1602.8gC.m-2.整个生态系统年平均呼吸速率为(4.37±2.98)μmol.m-2.s-1(24h平均数).其中,土壤呼吸、枝干和叶呼吸分别占整个森林生态系统呼吸的63%、16%和21%.乔木、灌木和草本叶呼吸速率分别占阔叶红松林生态系统植物呼吸的89.82%、5.57%和4.61%.阔叶红松林生态系统呼吸速率与大气和土壤温度之间呈显著的指数关系.大气和土壤温度能分别反映阔叶红松林生态系统呼吸的87%和95%.
引用
收藏
页码:1789 / 1795
页数:7
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