细叶龙竹秆形指标数学模型的建立

Stalk-shaped Index Mathematical Model of Dendrocalamus giganteus

对云南、广西等地细叶龙竹人工林进行调查,研究其竹秆特性,测量胸径、秆高、鲜重、含水量等指标.对部分指标做相关性检验,建立回归方程.研究结果表明,胸径与秆高、鲜重等因子显著相关,将不同立地等级竹材的胸径和秆高、胸径和秆重用直线、幂函数、多项式等方程进行拟合,拟合方程经F检验均达到极显著水平.造林密度越大,细叶龙竹每丛株数越少、胸径越小,秆高变化不大;在胸径相同的情况下,立地条件越好,细叶龙竹秆高越高,鲜重越重;细叶龙竹幼竹木质化程度低,其含水量高于成竹,雨季竹秆含水量较旱季高.

Dendrocalamus giganteus plantation in Yunnan and Guangxi were investigated to study the characteristics of the bamboo stalk, measure DBH, stalk height, fresh weight, water content and other indicators. Relative testing was made on some indices to build regression equation. Results showed that , DBH and stalk height, and fresh weight and other factors were significantly correlated. Using different site levels bamboo＇ s DBH and stalk height, DBH and stalk weight with line, power function, polynomial and other equations for matching. The matched equation reached significant level by the F-test. The den- ser the planting, the fewer the Dendrocalamus giganteus trees each clump, the smaller the DBH. The stalk height changes little. In the case of the same diameter, the better the site conditions, the higher the Dendrocalamus giganteus stalk, the heavier the fresh weight. The immature Dendrocalamus giganteus were in low lignification, its water content is higher than the adult bamboo, water content of the bamboo stalk is higher in the rainy season than in the dry season.