陕西周至老县城自然保护区种子植物区系研究

Studies on flora diversity of the seed plants in Laoxiancheng Nature Reserve,Zhouzhi,Shaanxi

采用植物区系地理学研究的方法,对陕西周至老县城自然保护区种子植物区系进行了研究。结果表明,保护区植物种类比较丰富,大科、大属占有重要地位,保护区有野生种子植物1 131种(含种下等级),隶属于109科453属,其中裸子植物4科9属13种,被子植物105科444属1 118种;地理成分复杂多样,具有明显的温带性质;区系具有一定的古老性;区系联系广泛,是多种区系成分的汇集、混杂和过渡。进一步分析表明,本区是秦岭种子植物区系的重要组成部分。

The flora diversity of the seed plants in Laoxiancheng Nature Reserve,Shaanxi,Zhouzhi was explored. The major results of the flora are as follows. Species are comparatively rich; there are 1 131 species （including infraspecific taxon） of seed plants belonging to 109 families and 453 genera in northwest china. Among them,there are 13 species belonging to 9 genera,4 families in gymnosperm. 1 118 species belong to 444 genera and 105 families in angiosperm. In those plants ,the big families and the big genera play important roles;the geographical elements of the flora are comparatively complex,and the genera of temperate are the dominant areal types ,the flora is ancient in origin. The flora has widely relate to other area, and the flora is the crisscrossing and assembling,mixing and transition of diversified floristic elements. These analysis results showed that this region is an important composition of Qinling Mountain plant flora.