新疆巩乃斯河中岛屿植物成分的组合结构

Composite Structure of Plant Components on the Aits in the Kunes River,Ili,Xinjiang

在新疆巩乃斯河中岛屿所设的3个样地54个样方中,共有62种植物,隶属于28个科,6个株生长型,3个根生长型,5个生活型,5个水分生态类型和5个饲用价值类型。其中,菊科和禾本科种类最多,各占14.5%,豆科占9.7%。株生长型结构以直立型种类最多,占50%。根生长型结构以直根型的种类最多,占56.5%。生活型结构以地下芽植物最多,占41.9%。水分生态类型结构以中生型种类最多,占59.7%。饲用价值类型结构以良等的种类为多,占22.6%。以上结论表明,巩乃斯河中岛屿植物群落具有如下特点:①生长型和生活型结构表明岛屿植物群落具有中温带草本群落植株和根系特点,也具有典型的地下芽植物气候特征。②水分生态型和饲用价值类型的统计分析说明,岛屿植物群落具有中生生境条件、饲用价值类型高的特征。

In this paper, the composite structure of plant components in 54 sample plots on 3 aits in the Kunes River, Ili, Xinjiang is researched. The results show that there are 62 plant species in 28 families, in which there are 6 plant-growth forms, 3 root-growth forms, 5 life forms, 5 aquatic ecotypes, and 5 forage-value forms. Among the 62 species, Gramineae and Compositae species are dominant, their proportions are all 14% , and the proportion of Leguminosae species is 12.9%. In the plant-growth forms, the proportion of erect species is the highest and for 50%. In the root-growth forms, the proportion of erect species is also the highest and for 56.5%. Among the life form plants, the proportion of geophytes is the highest and for 41.9%. The mesophytes make up 59.7% of the total aquatic ecotype plants. In the forage-value forms, the fine-quality species account for 23.7%. These conclusions reveal that the plant communities growing on the aits in Kunes River are characterized by ： （ 1 ） Structure of the plant-growth forms and life forms shows that the plant communities have the mid-temperate herbaceous community plants and the root systems, and also the typical climatic characteristics of underground-bud plants. （2） The statistical and analysis results of the aquatic ecotype and forage-value species reveal that the plant communities growing on the aits in the Kunes River have the mesophytic habitat conditions and the high forage value.