长白山阔叶红松林叶片气孔导度与环境因子的关系  

Relationship of stamatal conductance of leaf with environmental factors in broad-leaved Korean pine forest at Changbai Mountain

作　　者：唐凤德[1,2] 武耀祥 韩士杰[2] 张军辉[2] 

机构地区：[1]辽宁大学环境学院,沈阳110036 [2]中国科学院沈阳生态应用研究所,沈阳110016 [3]长白山国家自然保护区管理局,吉林安图133613

出　　处：《生态学报》2008年第11期5649-5655,共7页Acta Ecologica Sinica

基　　金：中国科学院知识创新工程重大资助项目(KZCX2-YW-416);国家重点基金资助项目(90411020)~~

摘　　要：通过对阔叶红松林主要树种叶片的野外测定,研究了长白山阔叶红松林叶片气孔导度对环境因子的响应,结果表明,阔叶红松林叶片的气孔导度与瞬时光合有效辐射(PAR)和温度(Ta)呈正相关,而与水汽压亏损(PVD)呈负相关。对气孔导度模型的验证表明:Jarvis的非线性模型比Ball的线性模型更适于阔叶红松林叶片的气孔导度模拟。长白山阔叶红松林叶片的气孔导度对环境因子的响应模型为:gs=PAR(1.606T2a+118.19Ta-1878.67)/(355.70+PAR)(-430.433+VPD)。此模型有助于进一步估算叶片光合作用,通过尺度化模拟阔叶红松林群落生产力以及土壤-植物-大气系统之间的水热交换奠定了基础。Based on the field measurements of the stomatal conductance of the dominant tree species in broad-leaved Korean pine forest, the responses of stomatal conductance of the single leaf to environmental factors were used to analyze the relationship between stomatal conductance of leaf and environmental factors and develop the single leaf model. The results show that the stomatal conductance of the leaves are sensitive to photosynthesis active radiation （PAR）, vapor pressure deficit （VPD） , and air temperature （ T ）. The stomatal conductance of leaf increase with PAR and Ta and decreased with the VPD. The validations of Ball＇s linear and Jarvis＇s non-linear models based on field data of leaf stomatal conductance （gs） on the broad-leaved Korean pine forest indicate that the Jarvis＇s model is better estimate of g, than Ball＇ s. The relationship between stomatal conductance （gs） of the leaf and environmental factors could be expressed as： gs = PAR（ 1. 606Ta^2 ＋ 118.19Ta- 1878.67）/（355.70 ＋ PAR） （ -430. 433 ＋ VPD） The model will be helpful to simulate the dynamic photosynthesis at leaf and canopy scales and also to simulate NPP and energy and water balances of broad-leaved Korean pine forest ecosystem in the Soil-Plant-Atmosphere Continuum （SPAC） .

关 键 词：阔叶红松林 叶片 气孔导度 环境因子 模拟 

分 类 号：Q948[生物学—植物学]