红椿半同胞家系苗期光合特性研究  

Photosynthetic Characteristics of Seedling Toona ciliata from Different Half-sib Families

作　　者：陈明皋[1,2] 程勇[1,2] 盛杰[3] 黄明军[1] 刘球[1,2] 黄小飞[1] 李艳[3] 吴际友[1,2] 

机构地区：[1]中国林科院湖南分院,长沙410004 [2]湖南省优质用材工程技术研究中心,长沙410004 [3]中南林业科技大学,长沙410004

出　　处：《中国农学通报》2016年第1期17-21,共5页Chinese Agricultural Science Bulletin

基　　金：湖南省林业科技计划项目"闽楠;红椿家具材良种选育与应用"(XLK201406)

摘　　要：针对红椿半同胞家系苗期光合特性研究,为红椿家系选择与栽培提供理论依据。以红椿6个半同胞家系2年生幼苗为试验材料,研究家系间光合特性。结果表明,红椿半同胞家系净光合速率、蒸腾速率日变化呈"双峰"曲线,存在"午休"现象,日平均净光合速率均值为3.49μmol/(m2·s),蒸腾速率为2.44μmol/(m2·s),水分利用效率为1.43μmol/(m2·s),光饱和点均值为1165μmol/(m2·s),光补偿点为42μmol/(m2·s),CO2饱和点为1897μmol/mol,补偿点为104.5μmol/mol。综合各参数分析,红椿为阳生喜光树种,对CO_2利用的范围较广,本试验家系中1号家系表现最佳。The study on the photosynthetic characteristics of seedling Toona ciliata from different half- sibfamilies aims to provide a theoretical basis for the selection and cultivation of Toona ciliata families. Taking Toona ciliata from 6 half- sib families of 2- year- old seedlings as test materials, the authors studied thephotosynthetic characteristics among the families. The results showed that the diurnal variation ofphotosynthetic rate and transpiration rate presented double peak curves and had the‘midday depression＇phenomenon. The mean value of the daily average net photosynthetic rate was 3.49 μmol/（m^2·s）, transpiration ratewas 2.44 μmol/（m^2·s）, water use efficiency was 1.43 μmol/（m^2·s）, light saturation point was 1165 μmol/（m^2·s） andlight compensation point was 42 μmol/（m^2· s）, CO2 saturation point was 1897 μmol/mol, CO2 compensationpoint was 104.5 μmol/mol. Comprehensive parameter analysis showed that Toona ciliata was an intolerant treespecies, the CO2 utilization range was wide, and No. 1 family was the best among the 6 half-sib families.

关 键 词：红椿 半同胞家系 光合特性 

分 类 号：S782.99[农业科学—木材科学与技术]