千烟洲湿地松树干生长量解析简捷方法探讨

树干生长量的调查是林业经营管理的重要内容,也是制定木材间伐方案的重要依据。针对目前传统材积调查方法存在的不足之处,提出用枝条生长量解析树干生长量的方法。以千烟洲湿地松人工林特定林分为研究对象,分析不同轮枝层枝条直径、节间长及材积的生长状况。通过对大量标准枝条生长量的测定,建立了枝条材积生长量与年龄及基径的回归预测模型。结合树干解析结果,得出了树干材积量与枝条材积量的相关关系方程。根据所得的回归模型,可以有效提高森林材积调查的工作效率,同时可以大大减少对树木的破坏。经一系列评价指标验证,回归模型可以满足精度要求。

A Simple Method for Stem Growth Analysis of Pinus Elliottii in Qianyanzhou

Stem analysis investigation is the critical item of forestry management and key to the determination of intermediate cuts.Aimed at defects in traditional volume investigations,a new way which analyzed branches instead of stem is raised.Citing the special artificial pinus elliottii in Qianyanzhou as objects,this paper analyzed diameter,internode length and volume growth of branches in all whorls.Through the measurement of a great quantity of branches,a regressional model on the relationship between branch volume and age plus basal diameter was established.Combined with stem analysis results,the regressional relationship between stem volume growth and branch volume growth is also established.Based on the above two models achieved,the work efficiency of stem analysis was greatly improved and the destructions on trees were much more reduced.Tests on the evaluation factors showed that two models could well satisfied the exactedness requirements.