松嫩平原不同生境星星草无性系种群的数量特征分析

通过单位面积取样调查,定量地分析了开花期星星草无性系种群的数量特征及其与无性系大小之间的关系。结果表明,星星草无性系种群分蘖株的数量决定于丛径的大小,并且放牧地略高于割草地;开花期星星草无性系分蘖株的数量两样地均以营养蘖数量占优势地位,割草地占总蘖数的63.48%,放牧地占54.69%,割草地略高于放牧地。星星草分蘖株数量和生物量与丛径之间呈极显著的直线正相关关系,其相关性均达到了极显著水平(P<0.01)。

Quantitative Characteristic of Puccinellia Tenuiflora Clone Populations in Different Habitats on the Songnen Plain of China

The relationship between quantity characteristic and the size of clone of Puccinellia Tenuiflora clone population at flowering stage sampled by unit area.The results showed that the number of tillers of P.Tenuiflora clone population was determined by the diameter of the cluster,and the number of tillers in grazing plot was slightly more than that of mowing plot.The number of the vegetative tillers of P.tenuiflora clones were dominant both in two plots at the flowering stage,which was 63.48% in mowing plot,and 54.69% in grazing plot,respectively.The vegetative tillers in mowing plot were slightly more than that in grazing plot.The number and biomass of tillers were positively correlative to the diameter of the cluster,which were all reached significance level(P<0.01).