厚壁毛竹春季光合日变化及其与主要环境因子的关系初探  

Studies on Diurnal Variation of Photosynthesis of Phyllostachys edulis cv.pachyloen and Their Relationships to Environmental Factors in Spring

作　　者：李迎春[1] 杨清平[1] 陈双林[1] 吴明[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400

出　　处：《林业科学研究》2009年第4期608-612,共5页Forest Research

基　　金：浙江省杭州市科技发展技术项目种子种苗专项(20071032H11);浙江省杭州市农业科技攻关项目(20080632B42)

摘　　要：The diurnal variation of photosynthesis of Phyllostachys edulis cv.pachyloen was studied by LI-6400,as well as those of photosynthetic photon flux density(PPED),CO2 concentration in air(Ca),relative humidity(RH) and air temperature(Tair) were measured,and the relationships between the diurnal of Pn,Tr and climatic factors were analyzed by correlation coefficient path coefficient and decision coefficient analysis.The results were as follows:in the typical spring sunny days under natural conditions,the curve of net photosynthetic rate(Pn) had one peaks,and the peak value was 9.06 μmol·m-2·s-1,which occurred at 11:00 o’clock in the morning.The curve of diurnal variation of transpiration rate was also one-peaked,but the peak value appeared at 13:00,which was 4.95 mmol·m-2·s-1 or so.For the characteristics of photosynthesis and transpiration,PPED was the primary determining factor,and RH,Ca,and Tair affected Pn,Tr indirectly by acting on PPED.The diurnal variation of photosynthesis of Phyllostachys edulis cv. pachyloen was studied by LI-6400, as well as those of photosynthetic photon flux density （PPED）, CO2 concentration in air （Ca）, relative humidity （RH） and air temperature （Tair） were measured, and the relationships between the diurnal of Pn, Tr and climatic factors were analyzed by correlation coefficient path coefficient and decision coefficient analysis. The results were as follows ： in the typical spring sunny days under natural conditions, the curve of net photosynthetic rate （Pn） had one peaks , and the peak value was 9.06 μmol · m^-2·s^-1 ,which occurred at 11：00 o＇ clock in the morning . The curve of diurnal variation of transpiration rate was also one-peaked, but the peak value appeared at 13：00, which was 4.95 mmol· m^-2·s＆-1 or so. For the characteristics of photosynthesis and transpiration, PPED was the primary determining factor, and RH, Ca, and Tair affected Pn, Tr indirectly by acting on PPED.

关 键 词：厚壁毛竹 净光合速率 蒸腾速率 环境因子 

分 类 号：S795.7[农业科学—林木遗传育种]