小兴安岭东北部植被组成的生活型及生活型谱分析

以小兴安岭东北地区的植被为对象，采用无样地抽样中的点四分法和样方法对群落的乔木、灌木和草本进行调查研究，从而得出各类植物生活型在不同气候条件下的变化规律：（１）随着群落类型由热带→温带→寒温带的变化，表现出高位芽植物呈递减趋势，而地面芽植物呈递增趋势的地带性变化规律；（２）在本区随着植被型由森林→灌木→草甸→沼泽的过渡变化，高位芽植物和地上芽植物的生活型百分率呈递减趋势，而地面芽植物和地下芽植物是与该地区气候特点相适应的优势生活型种类

Analysis of Life Form and Biological Spectrum of Vegetation Component

Adopting the point-central quarter method and the quadrat sampling method,trees, shrubs and herbs of plant community in northeast Xiaoxingan Mts. were investigated. The correlation between vegetation and environment was revealed. At the same time, the characteristics of vegetation component and structure were analysed. Furthermore, rank-correlation regression analysis about biological spectrum was made among different climatic zones and among different communities. So, the variation regulations of all kind of plants' life forms under 4 different climatic conditions were brought to light. The conclusions are as follows: (1) with the variation of distribution of community styles from the tropics, temperate to the cold temperate zone, phanerophytes decreased progressively, whereas, hemitryptophytes appeared an increasing zonality variation by degrees. (2) Along with the transition of vegetation styles fromforest, shrub, meadow to marsh, the rates of phanerophyte and chamaephyte reduced progressively,but hemitryptophytes and geophytes were superior life forms that adapt to the characteristics of climate of this area.