油蒿（Artemisia　ordosica）的蒸腾作用及其群落的水分状况  

A STUDY ON THE TRANSPIRATION AND WATER-DEFICIT REGIME OF THE ARTEMISIA ORDOSICA COMMUNITY

作　　者：杨宝珍[1] 董学军[1] 高琼[1] 刘志茂 阿拉腾宝[1] 

机构地区：[1]中国科学院植物研究所,内蒙古伊克昭盟林沙所

出　　处：《植物生态学报》1994年第2期161-170,共10页Chinese Journal of Plant Ecology

基　　金：国家自然科学基金

摘　　要：本文对比研究了处于不同生境的油蒿群落中油蒿的水分生理生态特性。结果表明：（１）半固定沙丘的油蒿比固定沙丘油蒿长势好，前者的生物量约为后者的４－５倍；（２）半固定沙丘土壤导水率是固定沙丘的１０倍左右；（３）叶温与气温之差和水势能较好地反映油蒿的生长状况，而蒸腾速率与扩散阻力反映不十分敏感。This paper is concentrated on the comparative study of the ecophysiolo-gical characteristics of the Artemisia ordosica communities in different soil types.Our results show that 1.The shrub growing in the dune community is in an better growth potential than that in the fixed dune community.The biomass of the dune community is about 4-5 times that of the fixed dune community;2.The soil water conductivity of the dune community is up to 10 times that of the fixed dune community;3.Water potential and the diff-erence between leaf and cuvette temperature can be used as indicators of the growth regime of Artemisia ordosica,whereas transpiration rate and diffusive resistance are less sensitive.

关 键 词：油蒿 群落 土壤导水率 蒸腾速率 

分 类 号：Q949.408[生物学—植物学]