松嫩平原碱化草甸三种多年生盐碱禾草群落生产特征的分析

采有随机取样方法调查与测定，分析了松嫩平原碱化草甸星星草，朝鲜碱茅，獐毛３种耐盐碱禾草单优群落的生产特征。星星草群落的生殖株在数量和重量上均占绝对比重，成穗率为８８．２％，其重量比率高达９４．７５。朝鲜碱茅群落生殖株的数量少于营养株的数量，成穗率为３９．５％，但生殖株与营养株所占的重量比率无明显差异。獐毛群落生殖株的数量远远少于营养株的数量，成穗率仅为１５．７％。在不同的生育期与密度条件下，獐毛群

ANALYSIS ON PRODUCING SPECIFICITY OF THREE COMMUNITIES OF PERENNIAL ALKALI-SALINE GRASS IN ALKALIZED MEADOW IN THE SONGNEN PLAIN

By way of making investigation and measurement with random sampling,producing specificities onthree single dominant communities of perennial alkali-saline grass which was Puccinellia tenuiflora,P. chinampoensis and Aeluropus littoralis var.sinensis in alkalized meadow in the Songnen Plain of china wereanalysed in this paper.The sexual plants made up a bsolute ratios on both number and weight,which theearing rate was 88.2%and the weight ratio of sexual plants was 94.7%in P. tenuiflora community. Thenumber of Sexual plants was less than the vegetative plants,which the earing rate was 39.5%but therewas not obvious variation on the weight ratios of the sexual plants and the vegetative plants in P. chinampoensis community. The number of sexual plants was more less than the vegetativc plants,which theearing rate was only 15.7%in A.littoralis var.sinensis community. There were relationships that was thelinear function y=a+bx between above-ground biomass and the density or weight of creeping plants andthe above-ground biomass in A. littoralis var.sinensis communities in both different growth Stages anddifferent density conditions.