荒漠区耐旱树种在异质生境中完成生活周期现象初探

我国干旱区一些耐旱乔灌树种,其成株适应干旱能力极强,但其种子萌发及幼体阶段即需地表湿润或短期积水才能完成定居和建群过程,在其生活周期的不同阶段,以水条件为特征的生境呈现明显的异质性。查明此现象,将有助于进一步认识旱生植物与其生存环境关系的多样性,从而为干旱区利用有限的水源以扩展旱生乔灌林木提供有价值的理论依据。

A PRELIMINARY STUDY ON THE LIVB CYCLE OP XEROPHILOUS ARBOR AND SHRUB PASSED INDISSIMILAR HABITAT IN ARID ZONE

Some xerophilous arbor and shrub in arid zone of our country, the adaptability of mature tree in arid weather is very well, but the stage of the seeds sprouted and the youngling need moist habitat or transient waterlogging in the nature seedbed, and than it can finish that the process of migration of plant andthe formation of the plant community. In the difference stage of its live cycle,he habitat of the xerophilous plant exist dissimilarities in water factor, Studing the phenomenon of the dissimilar habitat in its live cycle, the diversity ofthe relation of xerophytes and its environment will be understanded. It will become on the basis of theory that the forest of xerophilous arbor and shrub will expanded using the limited sources of water in the aird zone.