植物种群结构分析及生命表构建的实验教学设计

Experimental Teaching Design of Structure Analysis and Life Table Construction in Plant Population

为了深化对植物种群结构和生命表的认识和理解,以西南大学第一运动场附近的山(以下简称AH山)上的槐树种群作为研究对象.设计了植物种群结构分析及生命表构建实验.结果表明:槐树种群的结构接近正金字塔型,为增长型种群.由静态生命表看出该种群幼年个体数量丰富,成年个体数量相对较少,种群的期望寿命存在随龄级增加先增加后减小的趋势.存活曲线趋向于Ⅲ型,表现为幼年期死亡率较高.此实验通过调查自然槐树种群并对其进行分析,培养了学生的科研能力及科技论文写作能力.

In order to understand the dynamics characteristic of plant population,an experiment has been designed to analyze the population dynamic characteristics of Robinia pseudoacacia L.Age class structure,static life table and survival of a natural population,R.pseudoacacia have been surveyed in AH hill of southwest university.The results show that the age structure of the R.pseudoacacia population is a pyramid model which is a growing population.The number of young individuals is abundant,while the number of adult individuals is relatively small.Moreover,the life expectancy of population has been showed a trendy with increases first and then decreases with the increase of age class from the stationary life table.The survival curve tends to type III,which indicates a high mortality rate in early childhood.By investigating and analyzing the population of R.pseudoacacia,this experiment has cultivated the students'ability of scientific research and writing scientific papers.