摘要
本文以垂穗披硷草为材料研究了多年生植物群个体大小与密度的关系。研究结果表明，垂穗披硷草个体生物量与密度间的直线回归斜率β的绝对值于生长初期较小，随着生长时间的延长有所增加，但最大的β绝对值仅为１．０２从未达到－３／２。单株分孽数与密度间的回归斜率始终保持在较小的绝对值上。生活第三年种群密度对自生幼苗具有一定的影响。
The relationship between individual size and density of perennial population of Elymus nutans has been studied in the present paper. The result of the experiments based on seven treatments of density in field show that the absolute value of slope ( β ) of the lineary regression for mean biomass per plant and survival density changes with growth season. It has a lower absolute value of slope in early growing season than in later season. However, the highest absolute value of slope was only 1 02 and never reaches 1 5 in any treatment of densities for seven times of harvest. The values of slope of lineary regression between tillers per plant and density persisted at low levels in seven density treatments and seven times of harvest. Density of the population had a negative effect on seedling number of Elymus nutans.
出处
《植物生态学报》
CAS
CSCD
北大核心
1998年第6期552-558,共7页
Chinese Journal of Plant Ecology
基金
国家自然科学基金
关键词
垂穗披硷草
个体大小
种群密度
牧草
Elymus nutans, Individual size, Density of population
