云南松光合特性日进程及与叶面微气象因子的相关性分析  

Diurnal Course of Photosynthetic Characteristics of Pinus yunnanensis and Its Correlation with Leaf Surface Micro-meteorological Factors

作　　者：刘娟[1] 王健敏[1] 陈晓鸣[1] 杨子祥[1] 梁军生[1] 

机构地区：[1]中国林业科学研究院资源昆虫研究所,国家林业局资源昆虫培育与利用重点实验室,云南昆明650224

出　　处：《林业科学研究》2010年第3期448-452,共5页Forest Research

基　　金：云南省应用基础研究重点项目(2006C0015Z)“利用蛀干害虫作为指示昆虫诊断森林健康研究”;国家林业局林业公益性行业科研专项(200804001)“中国森林对气候变化的响应与林业适应对策研究”;国家林业局948项目(2009-4-37)“利用昆虫诊断森林健康评价指标体系及技术引进”

摘　　要：Diurnal changes of photosynthesis of Pinus yunnanensis and its influencing factors were studied in dry season.The results indicated that in the dry season,the diurnal course of photosynthesis of P.yunnanensis occurred regularly with the environmental factors change.The curve of net photosynthetic rate(Pn) and transpiration rate(Tr) had a diurnal change with one-peak curve,the peak of Pn occurred at 14:00 and the peak of Tr appeared at 15:00.There was no "midday depression of photosynthesis".The different meteorological factors influencing the photosynthesis were different.The photosynthetic active radiation(PAR) was the ecological factor directly effecting on the Pn and stomatal conductance(Cond) of P.yunnanensis,the main factors affecting Tr were temperature leaf(Tl) and CO2.The course of air humidity on the dry season were lower,and its effects on photosynthesis was not significant,which showes that the P.yunnanensis has a strong physiological adaptability on dry season.Diurnal changes of photosynthesis of Pinus yunnanensis and its influencing factors were studied in dry season.The results indicated that in the dry season,the diurnal course of photosynthesis of P.yunnanensis occurred regularly with the environmental factors change.The curve of net photosynthetic rate（Pn） and transpiration rate（Tr） had a diurnal change with one-peak curve,the peak of Pn occurred at 14：00 and the peak of Tr appeared at 15：00.There was no ＂midday depression of photosynthesis＂.The different meteorological factors influencing the photosynthesis were different.The photosynthetic active radiation（PAR） was the ecological factor directly effecting on the Pn and stomatal conductance（Cond） of P.yunnanensis,the main factors affecting Tr were temperature leaf（Tl） and CO2.The course of air humidity on the dry season were lower,and its effects on photosynthesis was not significant,which showes that the P.yunnanensis has a strong physiological adaptability on dry season.

关 键 词：云南松 光合日进程 叶面微气象因子 

分 类 号：S791.257[农业科学—林木遗传育种]