论文部分内容阅读
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。
The investigation of trunk growth is an important part of forestry management and an important basis for formulating the plan of timber thinning. In view of the shortcomings of the current method of volumetric surveys, a method for analyzing the growth of trunk by using the growth of branches was proposed. Taking the specific stands of Pinus elliottii plantation in Qianyanzhou as research object, the growth of branch diameter, internode length and volume of different rotation branches were analyzed. Through the determination of the growth of a large number of standard branches, a regression model was established for the growth of branch volume and its age and base diameter. According to the result of tree trunk analysis, the correlation equation between the amount of trunk material and the amount of shoot material was obtained. According to the regression model obtained, the efficiency of forest volume survey can be effectively improved and the damage to trees can be greatly reduced. After a series of evaluation indicators to verify, the regression model can meet the accuracy requirements.