旬河流域灌丛植被垂直分异规律的研究

STUDY ON LAW OF VERTICAL DIFFERENCE OF SHRUB WOOD VEGETATION IN XUNHE BASIN

植被的垂直分异是植被生态学的重要规律之一，根据旬河流域灌丛植被分布的特点，首次提出该流域灌丛垂直带的划分：（１）亚高山凉温性常绿、落叶阔叶典型灌丛带（２０００－２６００ｍ）；（２）中山温性落叶阔叶典型灌丛、杂木灌丛带（１０００－２０００ｍ）；（３）低山暖温性落叶阔叶典型灌丛、草灌丛带（１０００－６００ｍ）。各带灌丛植被有其各自的区系成分、起源、外貌以及与森林植被的关系等特征。流域灌丛植被垂直分异规律的研究，对流域灌丛植被的保护和森林植被的恢复以及流域的综合开发具有重要意义。

The vertical difference of vegetation is one of the important law of vegetation ecology.On the basis of the vertical difference of shrub wood vegetation in flora,growth form,origin,dominant synusia,dynamics and human impacts,three vertical zones of shrub wood vegetation were distinguished in this basin:(1) Zone of subalpine evergreen/diciduous broad leaf bush wood,alt 2000-2600 m;(2) Zone of middle mountain deciduous broadleaf bush wood,alt.1000-2000 m;(3) Zone of low mountain deciduous broadleaf bush wood,alt.600-1000 m.The research results will provide scientific basis for the shrubs vegetation protection,the forest restoration and the comprehensive exploitation in this basin.