摘要
牛皮桦（Ｂｅｔｕｌａａｌｂｏ－ｓｉｎｅｎｓｉｓｖａｒ．ｓｅｐｅｎｔｒｉｏｎａｌｉｓ）林是太白山森林植被的一个重要类型，随着生境条件的不同，其种类组成发生规律的变化，但牛皮桦始终占据优势地位，并有着相对稳定的结构组成。牛皮桦林以高大粗壮的牛皮桦个体为主，林内更新苗很少，天然更新状况不良。优势种群（牛皮桦）年龄分析表明，牛皮桦种群为衰退种群。牛皮桦种群的衰退特征反映出于皮桦林的消退发展趋势。目前本区牛皮桦林多属成熟林或过熟林，应加强人工更新。
Betula albo-sinensis var. septentrionalis forest is a important type of the forest vegetation of the Taibai Mountain region. The specific composition of Betula albo-sinensis var. septentrionalis forest is related to the ecotope conditions, but Betula albo-sinensis var. septentrionalis ususlly dominate the forest and the structre of the forest is relate stable. The analysis of Betula albosinensis var. septentrionalis population structure,dynamics and the natural regeneration indicated the Betula albo-sinensis var, septentrionalis forest abdicates.Betula albo-sinensis var. septentrionalis forest pretains to mature forest and over mature forest at present,the method of artificial regeneratin is used.
出处
《宝鸡文理学院学报（自然科学版）》
CAS
1994年第1期79-83,共5页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
关键词
牛皮桦林
种群
太白山
牛皮桦
Betula albo-sinensis var. septentrionalis forest
population
Taibai Mountain
