湖南会同天然次生常绿阔叶林群落呼吸量测定  

Mensuration of respiration amount in the community of secondary evergreen broadleaved forests in Huitong County,Hu'nan Province

作　　者：肖复明[1] 汪思龙[1] 范少辉[2] 杜天真[3] 陈龙池[1] 于小军[1] 

机构地区：[1]中国科学院沈阳应用生态研究所 [2]国际竹藤网络中心 [3]江西农业大学园林艺术学院

出　　处：《北京林业大学学报》2006年第S2期40-44,共5页Journal of Beijing Forestry University

基　　金：国家自然科学基金项目(30270268);中国科学院知识创新工程重大项目(KZCX3-SW-418)

摘　　要：该文对湖南会同天然次生常绿阔叶林中红拷-青冈-刨花楠群落CO2排放动态和各树种呼吸量进行了测定.结果表明,木质器官呼吸速率与其直径呈负相关关系,林木树干呼吸的季节变化规律为3—7月随着树木生长和气温的升高,树干呼吸呈上升的趋势,7月达年呼吸速率的最大值,8—12月呈逐渐递减的趋势,1—3月树干呼吸基本维持在一定数值上.根据测出的有关参数,用积分方法推导出阔叶林群落呼吸量为22·791t/(hm2·a),其中,树干、树枝、树根和树叶分别占年群落呼吸量的54·0%、17·2%、9·6%和19·2%.The dynamics of CO_2 release and respiration amount of Castanopsis hystrix-Cyclobalanopsis glauca-Machilus pauhoi community in secondary evergreen broadleaved forests were measured in Huitong County, Hu'nan Province. Results showed that the respiration rate of woody organs was negatively correlated with its diameter, and the annual changing pattern of the stem respiration became higher from March to July with tree growth and the increase of air temperature. The period of maximum stem respiration in the whole year was in July. The stem respiration became lower from August to December and maintained constant from January to March. Based on the correlation parameters of respiration and using integral method, the annual respiration amount of secondary evergreen broadleaved forest community was calculated to be 22.791 t/(hm~ 2 ·a), and the stem respiration,branch respiration, root respiration and leaf respiration accounted for 54.0%,17.2%, 9.6% and 19.2% of the total respiration amount, respectively.

关 键 词：天然次生阔叶林 群落呼吸 CO2排放动态 

分 类 号：S718.5[农业科学—林学]