不同密度下羊草种群的无性繁殖对策  

The Strategy of Asexual Reproduction for Population of Leymus chinensis under Different Densities

作　　者：金晓明[1] 兰雪 官庆新 马梁硕 张骁 张浩 张忠哲 

机构地区：[1]呼伦贝尔学院生命与环境科学学院,内蒙古呼伦贝尔021008

出　　处：《草地学报》2017年第4期845-850,共6页Acta Agrestia Sinica

基　　金：国家自然科学基金资助项目(31560657);内蒙古自然科学基金项目(2014MS0304);呼伦贝尔重点科技专项(2014)资助

摘　　要：通过人为控制种群密度的栽培试验,从构件水平观测羊草种群的年龄结构、繁殖分配特征、潜在种群与现实种群的动态,分析不同密度下羊草种群的无性繁殖对策。结果表明:不同播种密度下,羊草首先调节种群的数量、生物量及年龄结构,继而调节潜在种群的数量,使未来种群数量维持在较适宜的水平,即较低的播种密度不但有利于羊草种群的年龄结构趋于稳定,而且还有利于羊草种群数量和生物量的增长及空间扩展。Through the cultivation experiment in which the population density was artificially controlled,the age structure,reproductive allocation characteristics and the dynamics between the potential population and real population of L.chinensis were observed at the module level.The results showed that under different sowing densities,L.chinensis firstly adapted its population quantity,biomass,and age structure,and then regulated the potential population quantity to maintain the future population quantity at a suitable level.Low sowing density not only maintained a stable trend of the age structure of the population,but also facilitated an increase in the population quantity and biomass and at the same time extended its space.

关 键 词：年龄结构 繁殖分配 潜在种群 

分 类 号：S543.9[农业科学—作物学]