文献类型：期刊文献

中文题名：乌兰布和沙区沙棘光合蒸腾日变化与主要环境因子的关系

英文题名：Daily dynamics of photosynthetic and transpiration rates of Hippophae rhamnoides and their relationships with environmental factors in Ulan Buh desert

作者：陈海玲[1] 章尧想[1] 刘芳[1] 徐军[1] 葛根巴图[1] 马迎宾[1] 段娜[1] 黄雅茹[1]

第一作者：陈海玲

机构：[1]中国林业科学研究院沙漠林业实验中心

年份：2015

卷号：50

期号：2

起止页码：116-121

中文期刊名：甘肃农业大学学报

外文期刊名：Journal of Gansu Agricultural University

收录：北大核心:【北大核心2014】；CSCD:【CSCD_E2015_2016】；

基金：中央级院所基本科研业务专项(CAFYBB2011005-6);国家林业科技推广项目([2012]31号);中央级院所基本科研业务专项(CAFYBB2012003);国家林业种质资源平台项目

语种：中文

中文关键词：沙棘;光合速率;蒸腾速率;环境因子

外文关键词：Hippophae rhamnoides L. ;photosynthetic rate ; transpiration rate; environment factor

分类号：S793.6

摘要：在自然条件下,利用LI-6400光合仪,测定了乌兰布和沙漠6个沙棘品种的光合蒸腾特性及主要环境因子的日变化,并采用相关系数、通径系数和决策系数探讨了主要环境因子对沙棘品种光合蒸腾日变化的影响.结果表明:6个沙棘品种的净光合速率呈典型的"双峰"曲线,在13∶00左右有明显的光合"午休"现象;‘白丘’与‘深秋红’蒸腾速率日变化呈"双峰"曲线,其余4个沙棘品种呈"单峰"曲线;PAR是直接影响沙棘光合蒸腾速率日变化的最大环境因子,并起主要决策作用;Ca、Ta和RH间接影响沙棘的光合蒸腾速率日变化,是主要限制因子.
Under natural conditions,diurnal changes of photosynthetic and transpiration rate of six seabuckthorn cultivars and main environmental factors were measured by using LI-6400 photosynthesis system.The correlation coefficient,path coefficient and decision coefficient were used to determine the effects of main environmental factors on the diurnal changes of photosynthetic and transpiration rate of sea-buckthorn cultivars.The results were as follows：Diurnal change of photosynthetic rate of six sea-buckthorn cultivars showed bimodal pattern and an obvious midday depression at 13∶00o＇clock.Diurnal change of transpiration rate of‘Baiqiu＇and‘Shenqiuhong＇both showed bimodal pattern,which of the others showed unimodal pattern.PARhad the greatest effect on the diurnal dynamics of photosynthetic and transpiration,and was the primary determining factor.Ca,Taand RH affected photosynthetic and transpiration mainly through their acting on PAR,and were the main limiting factors.