沙区五种珍稀濒危植物水分生理指标测定及分析

An Analysis on Water Physiological Characteristics of Five Species of Rare Plants

本文在测定沙区５种珍稀濒危植物的水分生理指标的基础上，分析了其抗旱性，意在探讨适应干旱环境的特性。研究结果表明：矮沙冬青保水能力与吸水能力强，对干燥炎热的环境有很强的适应性；银沙槐蒸腾强度大，失水快，但吸水力强，补偿水分快；裸果木通过强的保水力适应干旱；绵刺以强的吸水力和抗脱水力适应环境；准噶尔无叶豆以体内水分自我调节作用适应大气干旱。

This paper analysed the water physioloyical characteris-tics of 5 species of rare plants. The purpose is to find out the appro-aehes of the plant adaptablities to the drought environment.The result shows that Ammopiptanthus nanus has a strong waterholding power and water-absorbing capacity. It can adapt itself to the drought environ-ment well. Ammodendron loifoliuan has a high transpiration rate and Strong water-absorbing capacity. Cymncarpos przewalskii adapts itslf to the environment by a strong water-holding power,so does Potaninia mongolica, Eromosportan songoricum through the adjustment of water in its body adapt itself to the environment.