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测定立木材积的改进形点法

Precision form method to determine standing wood volume.

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【作者】 冯仲科徐祯祥王小昆孔维鹤

【Author】 FENG Zhong-ke1; XU Zhen-xiang2; WANG Xiao-kun1; KONG Wei-he3.1 The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, 100083, P. R. China;2 Henan Academy of Forestry, Zhengzhou, 450008, P.R.China;3 Henan Forestry Technology Promotion Station, Zhengzhou, 450000,P.R.China.

【机构】 北京林业大学省部共建森林培育与保护教育部重点实验室河南省林业科学研究院河南省林业技术推广站

【摘要】 为了测定立木的材积,该文应用孔兹干曲线方程建立了表达整株树干形状的连续干曲线方程组和树干材积的精准区分求积式.据此,推导出立木的改进形点法求积式.为了克服对形点的观测困难,该文又提出了形点高的推定式,便于发挥外业调查的工作效率.以精准区分求积式所求材积为真值,中央断面区分求积法、改进前的立木形点法和改进形点法分别与其进行比较,理论与实验证明,改进形点法测定立木材积的过程简便易行,具有更高的准确度、通用性和实用性.

【Abstract】 In order to survey standing wood volume, based on Kunze Trunk Curve Equation, the authors built another continuous trunk curve equation set to describe whole trunk form. At the same time, precision volume calculation equation by section was put forward. An improved tree accurate volume measurement equation of form point method had been thus deduced. They also worked out an upward deduction equation in form point height h-2 to conquer difficulties in surveying form points,and increase the efficiency of forestry investigation. Therory and experiment have proved that under the precondition of setting the trunk volume surveyed by precision volume calculation equation by section as true number, compared with mid-area sectional measurement method of the volume and the old form point method, improved form point method is simple and operative, more accurate and practicable.

【基金】 “863”国家计划项目(2003AA245030);国家自然科学基金项目(90302014);北京市自然科学基金重点项目(4041002).
  • 【文献出处】 北京林业大学学报 ,Journal of Beijing Forestry University , 编辑部邮箱 ,2005年05期
  • 【分类号】S758.3
  • 【被引频次】17
  • 【下载频次】154
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