文献类型：期刊文献

中文题名：乌兰布和沙漠东北部8种沙生灌木生长季末期的光合生理特性

英文题名：Photosynthetic and Physiological Characteristics of Eight Psammophilic Shrub Species in Northeast Ulanbuh Desert during the Late Growing Season

作者：李清河[1] 刘建锋[1] 张景波[2] 江泽平[1]

第一作者：李清河

机构：[1]中国林业科学研究院林业研究所;[2]中国林业科学研究院沙漠林业实验中心

年份：2006

卷号：26

期号：11

起止页码：2318-2323

中文期刊名：西北植物学报

外文期刊名：Acta Botanica Boreali-Occidentalia Sinica

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金："十一五"科技攻关课题(2005BA517A01);国家863计划项目(2002AA2Z4011-02)

语种：中文

中文关键词：乌兰布和沙漠;沙生灌木;光合生理特性

外文关键词：Ulanbuh Desert ; psammophilic shrub ; photosynthetic and physiological characteristic

分类号：Q945.1

摘要：以乌兰布和沙漠东北部的甘蒙柽柳、沙木蓼、霸王、沙冬青、花棒、白刺、梭梭和柠条8种沙生灌木为材料,对沙生灌木生长季末期的光合生理特性进行了研究。结果表明:(1)8种沙生灌木秋季的气孔导度日变化有明显的峰谷;气孔导度日均值最大的为梭梭(0.71 mol.m-2.s-1),最小的为柠条(0.08 mol.m-2.s-1);(2)8种沙生灌木秋季的光合速率日变化均呈现单峰曲线,影响光合速率变化的因素以非气孔限制因素为主;光合速率峰值出现时间以柠条最早(11:30),甘蒙柽柳和沙木蓼最晚(15:30);光合速率日均值最大的为沙木蓼(7.99μmol.m-2.s-1),最小的为柠条(3.40μmol.m-2.s-1);(3)蒸腾速率的日变化除梭梭和柠条呈现单峰曲线外,其余6种灌木呈现出准双峰曲线或双峰曲线;蒸腾速率日均值最大的为梭梭(4.42 mmol.m-2.s-1),最小的为柠条(0.47mmol.m-2.s-1);气孔运动因素对蒸腾作用的影响占据优势;(4)8种沙生灌木的光合水分利用效率在白昼普遍高于早晚,且以柠条的光合水分利用效率日均值最大(7.18μmol.mmol-1),梭梭最小(1.23μmol.mmol-1);蒸腾速率日均值高的沙生灌木光合水分利用效率日均值低,反之亦然。
The photosynthetic and physiological characteristics of psammophilic shrubs were studied with Tarnarix austrornongolica Willd. , Atraphaxis bracteata A. Los. , Zygophyllurn xcanthoxcylon Maxim. , Arnrnopiptanthus rnongolicus Maxim., Hedysarurn scoparium Fisch. et Mey., Nitraria tangutorum Bohr. , Haloxylon ammodendron Bge. ,Caragana korshinskif Kom. growing in northeast Ulanhub desert as the experiment materials. It was shown that （1） these eight psammophilic shrub species showed clear peaks in stomatal conductance in autumn and H. ammodendron had the highest stomatal conductance（0. 71mol·m^-2·s^-1 ） and C. korshinskii had the lowest stomatal conductance （0.08 mol·m^-2·s^-1） ; （2） The photosynthetic rates of these psammophilic shrubs varied in single-peak curves and their affecting factors were mainly non-stomatal ones;the photosynthetic peak appeared the earliest （11：30） in C. korshinskii and the latest （15：30） in T. austrornongolica and A. bracteata;The highest photosynthetic rate （7.99 μmol·m^-2·s^-1） appeared in A. bracteata and the lowest photosynthetic rate （3.40 μmol·m^-2·s^-1 ） in C. korshinskii; （3） The daily transpiration rates of H. ammodendron and C. korshinskii varied in a single-peak curve and those of the other species varied in a para double-peak curve or a double-peak curve;the highest tran- spiration rate （4.42 mmol·m^-2·s^-1） occurred in H. ammodendron and the lowest transpiration rate （0. 47 mmol·m^-2·s^-1） in C. korshinskii;The effects of the factors relating to stomatal movement on the transpirations dominated; （4） The water use efficiencies of the eight psammophilic shrub species were higher during day than at night,C, korshinskii had the highest average daily water use efficiency （7.18 μmol·mmol^-1） and H. ammodendron the lowest average daily water use efficiency （1.23 μmol·mmol^-1） ;The psammophilic shrub species with higher daily transpiration rate had lower average daily water use efficiencies and lower photosynthetic rates and vice versa.