不同生境中荻草根状茎扩展速率及地上茎生长的研究  

Study on Growth Rate of Triarrhena sacchariflora Rhizome and Growth of Its Aerial Stem in Different Habitats

作　　者：周存宇[1] 杨朝东[1] 

机构地区：[1]长江大学园艺园林学院,湖北荆州434025

出　　处：《安徽农业科学》2009年第22期10482-10483,共2页Journal of Anhui Agricultural Sciences

基　　金：长江大学博士启动基金(801190010105);湖北省教育厅青年项目(Q200612004)

摘　　要：[目的]研究不同生境中获草根状茎的生长特性。[方法]对2种不同生境（山地、平原）中获草根状茎的扩展速率及动态进行研究，同时对获草地上茎的生长动态、高度和密度进行比较。[结果]山地和平原生境中获草根状茎的平均扩展速率分别为82．3、125．6cm／a，扩展较快的时段均为水热条件较好的5～8月份；2种生境中获草地上茎的密度均在8月份达到最大（平均为54．2、76．5株／m2），高度均在11月份达到最大（平均为127．2、168．5cm）。[结论]平原生境中荻草根状茎的扩展速率和地上茎的生长速率均快于山地生境中。[ Objective ] The aim was to study the growth characteristic of Triarrhena sacchariflora rhizome in different habitats. [ Method ] The growth rate and growth dynamic of T. sacchariflora rhizome in 2 kinds of habitats （ mountainous region, plain） were studied, and the growth dy- namic,height and density of aerial stem of T. sacchariflora were compared. [ Result ] The average growth rate of T. sacchariflora rhizome in mountainous region and plain were 82.3,125.6 cm/a resp. and the period that grew fast was from May to August with good water and heat condition. The density of aerial stem of T. sacchariflora in 2 habitats all reached the biggest in August （ being average of 54.2 and 76.5 plant/m2 ） and the height of T. sacchariflora reached the biggest in November （ being average of 127.2,168.5 cm）. [ Conclusion ] The growth rate of rhizome and aerial stem of T. sacchariflora in plain were all higher than those in mountainous region.

关 键 词：荻草 根状茎 扩展速率 生境 

分 类 号：S688.5[农业科学—观赏园艺]