辽宁省本溪地区不同生境下芒生长性状

Growth Traits of Miscanthus sinensis under Different Habitats in Benxi,Liaoniang Province

通过样方法调查了芒(Miscanthus sinensis)在辽宁省本溪地区的3个生境(阿家岭、九龙山、东湖风景区)中的生长状况,比较了不同生境下芒生长性状的变异系数,利用R聚类分析阐述了芒各生长性状的相关性。结果表明:芒在本溪地区属点状分布,喜低海拔、土壤湿润、光照充足的生境;不同生境下芒的生长性状存在差异,芒的生长性状特征和生物量随着生境内土壤含水量的上升和光照条件的改善而发生变化,各生境间部分性状差异显著(P<0.05);通过比较芒生长性状的变异系数,芒的叶形指数(叶长/叶宽)、株高、地下茎粗、分布深度等表型性状受环境因素影响小,相对稳定;通过R聚类分析,芒的株高、茎粗等茎部性状与生物量显著相关。

The study was conducted to investigate three habitats of Miscanthus sinensis in Benxi, compare the variation coefficient of the growth traits in different habitats, and analyze the correlation of growth traits between different habitats. Miscanthus sinensis in Benxi is dotted and prefers the habitat of low altitude, soil moisture and high light intensity. There are differ- ences of Miscanthus sinensis growth traits under different habitats, and the biological components and biomass increased with the soil water content increasing and light conditions improving. There is a significant difference of some growth traits among different habitats （P〈0.05）. The coefficient of variance in Miscanthus, the growth traits, the leaf shape index, plant height, stem diameter and depth of underground distribution of phenotypic traits are relatively stable and less influ- enced by environmental factors. The plant height and stem diameter were significantly related with plant biomass by using R-Cluster analysis.