Comparative Study on Stand Factors and Phenotypic Characters of Shoot Oriented Dendrocalamus latiflorus Forests
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摘要: 以柳州市5个不同螺蛳粉原料基地内的麻竹林作为研究对象，对不同地区内的麻竹林的胸径、株高、枝下高、冠幅、壁厚、秆重等相关表型性状指标进行测定及分析。结果表明：5个基地的胸径、株高、枝下高、冠幅、秆重存在显著性差异，壁厚的差异性不显著。柳北区的平均密度最大，柳城县-2最小，柳城县-1和柳城县-2、柳城县-2和柳北区的平均密度存在显著性差异，鱼峰区整齐度最小，柳北区最大，柳城县-2均匀度最大。从群体间和群体内变异来看，5个基地的各指标都呈现了较大的变异，枝下高的群体内变异系数最高，达96.19%，壁厚的群体内变异系数最小，为11.96%。壁厚与节间胸径的总体变化趋势缓慢减小，节长则呈先升高再减少的趋势。主成分分析表明，5个基地中，影响麻竹林分的主要因子是株高、胸径、冠幅、秆重，其次为壁厚和枝下高。Abstract: The Dendrocalamus latiflorus forests in five different snail powder raw material bases in Liuzhou City were chosen as research objects,the relevant phenotypic traits of Dendrocalamus latiflorus plants in different areas, such as DBH, plant height, height under the first branch, crown width, wall thickness and culm weight, were measured and analyzed. The results showed that there were significant differences in DBH, plant height, height under the first branch, crown width and culm weight among the five bases, but there was no significant difference in wall thickness. The average density of Liucheng County-1 and Liucheng County-2, Liucheng County-2 and Liubei District were significantly different. The average density of Dendrocalamus latiflorus forest in Liucheng County-2 was the lowest,and that in Liubei District was the largest,the mean densities of Liucheng County-1 and Liucheng County-2, Liucheng County-2 and Liubei District were significantly., The uniformity of Dendrocalamus latiflorus forest in Yufeng District was the smallest, and in Liubei District the largest. The evenness Dendrocalamus latiflorus forest was the highest in Liucheng County-2. From the point of view of inter population and intra population variation,each index of the five bases showed great variation. The intra population variation coefficient of branch height was the highest,reaching 96.19%,and the intra population variation coefficient of wall thickness was the lowest,being 61.81%. The overall trend of wall thickness and internode diameter at breast height decreased slowly, while the internode length increased first and then decreased. Principal component analysis showed that the main factors affecting Dendrocalamus latiflorus stand were plant height,diameter at breast height,crown width and stem weight,followed by wall thickness and branch height.
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Key words:
- Dendrocalamus latiflorus /
- Stand factor /
- Phenotypic traits
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