摘要
立木材积表是森林经营中必不可少的工具,材积表的精度直接影响森林调查结果的可靠性。以前采用的天山云杉二元材积表,由于编表缺乏有效的干形分析,干形遭到严重的人为扭曲,致使蓄积调查精度不高。为了提高天山云杉二元材积表的调查精度,本文在有效的干形分析前提下,利用山本式V=aD^((?)1)H^(b2),分五段拟合而成。经检验,有较高精度,可在实际中应用。
Standing stock table is a necessary tool for forestry management, whose precision directly affects the reliability of the forest survey. Binomial stock table of Picea Schrenkiana used in the past, due to Lackirg of effectient analysis of stem form in making—table, and serious artificial distortion for stem form, made precision of the forestry volume survey not high. To reach the high precision of forest survey, this paper, on the basis of effecient analysis of stem form, takes the formula V=aD^(b1)H^(b2), dividing into five parts and being regressived. Through test, it has high precision, and can be used in practice.
关键词
云杉
材积表
编制
森林经营
Picea Schrenkiana
binomial stock table
analysis of stem form
regression dividing into parts
