Abstract: According to investigation and measurement by a large amount of sampling on the afon tufts and random sampling in the normal spilies in the single donimant community,reproduction characters of Puccinellia chinampoensis in alkalized meadow in the Songnen Plain of China were quantitatively analysed in this paper.There were obvious regularities between the quantitative characters on vegrtative propagation of the population.There was a positive linear correlation between the number of plants per toft,the above -ground biomass Per tuft,the number of sexual plants Per tuft,the weight of sexual plants per tuft and the tuft sizes respectively,and between the weight of sexual plants per tuft and the numbers of the tuft sizes.There was more orderliness in the all process of growing and developing of the PoPulation.The regularities showed that the number of spikelets each nede of conical spikes were Gamma distribution The numbers of florets each node of the spikes were Logistic curvs decrease along with node-order number increase.Both the spikelets and the norets was a Y =ae^[-b/x] exponential growth of saturated curves along with node -order number increase in different spikes of number.

Key words: Puccinellia chinampoensis, Vegetative propagation, Sexual reproduction, Quantitative character, The Songnen Plain

摘要： 通过对朝鲜碱茅单化群落独立株丛的大样本取样和对正常花序随机取样的调查与测定,定量分析了松嫩平原碱化草甸朝鲜碱茅种群的生殖特性。朝鲜碱茅种群话营养繁殖数量性状之间有较强的规律性。丛分蘖数、丛地上生物量、丛生殖枝数和丛生殖技重分别与丛径之间,以及丛生殖枝重与丛生殖枝数之间均为线性正相关,丛生物量随着丛分蘖数的增加呈幂函数增加。朝鲜碱茅种群在整个生殖生长发育过程中具有较强的有序性。圆锥花序各节位上的小穗数量呈伽玛分布。各节位上的小花数量随着节位的增高呈Logistic曲线形式减少。小穗数和小花数均随着节位的增加呈y＝ae^-b/x饱和型指数曲线形式累积增长。

关键词: 朝鲜碱茅, 营养繁殖, 有性生殖, 数量性状, 松嫩平原