两种碱茅种群果后营养繁殖的定量分析

The Quantitative Analysis of Vegetitave Propagation After Fruiting on Two Species Puccinellia Populations.

通过对独立分蘖丛的取样调查，定量分析了松嫩平原碱化草甸星星草和朝鲜碱茅种群的果后营养繁殖。结果表明，两种碱茅分蘖丛果后营养繁殖的数量均以分蘖芽所占的比重最大，星星草和朝鲜碱茅分别为５４．１％和６３．３％；分蘖苗次之，分别为３０．９％和３０％；分蘖株最少，分别为１５％和６．７％。星星草的营养繁殖力比朝鲜碱茅的强。两种碱茅的分蘖株、分蘖苗、分蘖芽均随其丛径的增加呈直线函数增加。

By sampling and investigating on the alone tufts,vegetative propagation after fruiting on the populations of Puccinellia tenuiflora and P.chinampoensis in alkalized meadow in the Songnen Plain of China were quantitatively analysed in this paper.The results showed that the proportioiis of tiller buds to number of vegetative propagation after fruiting were the greatest in the turts of two species Puccinellia,which were 54.1%in P.tenuiflora and 63.3%in P.chinampoensis.There was more vegetative propagativi-ty in the tufts of P.tenuiflora than in the tufts of P.chinampoensis.The tiller stems,the tiller seedlings and the tiller buds all were linear funcction growth along with the tuft sizes increase in the tufts on two species Puccinellia.