论文部分内容阅读
利用取自10个林分的501株树木的数据,建立了单株立木的干材、树干皮、总的树干、1年生针叶、全部针叶、活枝和树枝总和的干重的估计方程。林分树干的重量与林分断面积和平均高密切相关。林分活枝重量与立木度成反比。林分1年生叶随立木度和立地指数的增加而增加。在阿巴拉契亚(APPalachian)山和弗吉尼亚(Virginia)山麓大片荒芜的农场土地上,存在弗吉尼亚松林(Pinus V-irginiana Mill)。天然林是纸浆材的重要来源,而人工造林正使这种林分不断扩大。利用量的剧烈增长,使得立木各组成部份重量的估计成为必要。本文提出了预报单株立木的方程,并讨论了影响弗吉尼亚松林分重量的一些因素。
Based on the data of 501 trees collected from 10 stands, the equations for estimating the dry weight of the total dry matter, trunk bark, total trunk, annual conifer, all needles, live branches and branches of single stand were established . The weight of the trunk is closely related to the area and average height of the stands. Stands Livewood weight is inversely proportional to stand angle. The stand of 1-year stand increased with the increase of stand index and site index. There is the Pinus V-irginiana Mill on the barren farmland in the mountains of the Appalachian Mountains and Virginia. Natural forests are an important source of pulpwood, and afforestation is making this growing. The drastic increase in the amount of usage has made it necessary to estimate the weight of the various parts of the standing tree. This paper presents the equations for forecasting standing trees and discusses some of the factors that influence the weight of Virginia pine forests.