干旱区研究2014，Vol.31Issue(3)：516-522,7.
古尔班通古特沙漠羽毛针禾(Stipagrostis pennata)种群种子雨特征
Seed Rain of Stipagrostis pennata in the Gurbantonggut Desert
摘要
Abstract
In this study,some seed collectors were distributed to collect seeds of Stipagrostis pennata,and the collected seeds were divided into several groups based on their temporal and spatial differences so as to analyze the characteristics of seed dispersal and seed rain of S.pennata in the Gurbantonggut Desert.The results are as follows:① The average accumulated density of seed rain of S.pennata was as high as 3 766.30 seeds under each plant,in which the proportion of full seeds accounted for 19.56％ ; ② The peak of seed dispersal occurred from June 25 to July 15,the proportion of falling seeds during this period was 61.96％ of the whole seed rain,and the seed rain density was decreased gradually with the time; ③ There was no significant difference of seed rain density among the different habitats; ④ There was a significant difference of seed rain amount among the different ages of S.pennata plants ; ⑤ Seeds fell intensively within a 4-m extent downwind and 1-m extent around the plants at the early stage of seed dispersal of seed rain.In the southern marginal zone of the Gurbantonggut Desert,the quality of seed rain was low,but the density was high and of a certain significance to the natural regeneration of the population.关键词
羽毛针禾(Stipagrostis pennata)/种子雨密度/空间分布/生境/古尔班通古特沙漠Key words
Stipagrostis pennata / seed rain density / spatial distribution / habitat/ Gurbantonggut Desert引用本文复制引用
龙丽红,王慧,马晓丽,徐鸿斌,王绍明..古尔班通古特沙漠羽毛针禾(Stipagrostis pennata)种群种子雨特征[J].干旱区研究,2014,31(3):516-522,7.基金项目
国家自然科学基金项目(31060067,41271281) （31060067,41271281）
国家重点基础研究发展计划(973)课题(2009CB825103)资助 （973）
