文献类型：会议论文

英文题名：A study on photosynthesis of three-month old eucalypt cuttings

作者：Lu, ZH[] Xu, JM[] Chen, RX[] Li, GY[] Bai, JY[] Chen, DX[]

第一作者：陆钊华

通信作者：Lu, ZH[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangdong 510520, Peoples R China

会议论文集：International Symposium on Eucalyptus Plantations

会议日期：SEP 01, 2002-SEP 06, 2003

会议地点：Guangzhou, PEOPLES R CHINA

语种：英文

年份：2003

摘要：The photosynthesis of six 3-month-old supefior eucalypt clones that are widely extended for plantation purpose was tested. The light response saturation point of E. urophylla was between 1800-2000 mu mol/m(2)/s; the net photosynthetic rate (Pn) and irradiance had a quadratic correlation. Significant difference in photosynthesis of seedlings was found among eucalypt clones Transpiration rate (E) and Pn of the eucalypt clones were higher than other local broad-leave tree species. Not only did some clones of E. urophylla x E. grandis and E. urophylla x E. tereticornis grow faster than clones of E. urophylla x E. camalduensis and E. urophylla, but also had higher water use efficiency (ATE) and photosynthesis ability. Daily variation of Pn, E and leaf conductance (Cond) of different clones are similar. Leaf intercellular CO2 concentration (Ci) and Pn of different clones changed in opposite direction but showed the same pattern. Pn, Cond and WUE had positive correlation with the height, DBH and individual volume. Photosynthesis testing was suggested to assist early selection of supefior eucalypt clones.