假俭草种群变异与生态特性的研究  

Ecological characteristics and morphological variations of centipedegrass in different populations.

作　　者：白史且[1] 苟文龙[2] 张新全[2] 张新跃[2] 高荣 刘世贵[1] 

机构地区：[1]四川大学草原生防国家专业实验室 [2]四川农业大学草业工程重点实验室 [3]四川草原工作总站

出　　处：《北京林业大学学报》2002年第4期97-101,共5页Journal of Beijing Forestry University

基　　金：农业部重大项目"全国牧草 (草坪草 )种质资源保护与利用 (西南片区 )"(2 0 0 1 0 2 )资助

摘　　要：通过大量的野外调查和田间测定 ,对假俭草 (Eremochloaophiuroides (Munro)Hack .)野生种群生态分布的区域、特点、生境类型、群落组成及形态学变异进行了研究 .结果表明 :①该研究的调查范围中 ,假俭草分布在 6 0～ 70 0m海拔 ,土壤pH范围在 4 34～ 8 2 8之间 ,生境可以分为 :河滩草地型、疏林草地型、丘陵山地型 3种类型 ;②假俭草的群落结构中主要的优势植物种有马尾松、狗牙根、牛鞭草和结缕草等 ;③假俭草不同种群的外部形态性状发生了较大的变异 ,说明假俭草种质资源有较丰富的遗传多样性 ;④用SPSS10 0软件对形态学测定结果进行聚类分析 ,将 15个种群分为 5大类 ,聚类结果与材料的地理分布基本一致 ,种群 3号 (重庆黔江种群 )、11号 (重庆南山种群 )The ecological distribution areas, features, ecological environment types, community constituents and external morphological diversity of native centipedegrass ( Eremochloa ophiuroides (Munro) Hack.) are studied. The results show that: ① The centipedegrass investigated and studied is distributed from the altitude of 60 m to 700 m. The pH of soil is from 4 34 to 8 28, the ecological environment types of centipedegrass can be classified into three types, namely, flood bed grassland type, open forest grassland type and hill grassland type. ② The main plant species in the community of centipedegrass are masson pine, bermudagrass, Hemarthria and Zoyiagrass. ③ There is a big variation in the external morphology of centipedegrass, which explains genetic diversity in germplasm resources of native centipedegrass. ④ The native centipedegrass populations, based on the external morphological index, are clustered by SPSS software and classified into 5 groups, and clustering results are identical with the geographical distribution of centipedegrass. The No.3 (Chongqing Qianjiang) and the population No.4 (Chongqing Nanshan) are good breeding materials for turfgrass.

关 键 词：野生假检草 生态特性 种群变异 草坪草 

分 类 号：S688.4[农业科学—观赏园艺]