这项调查研究的目的是:(1) 提出一种望远速测镜(TSR)以提高测定树干上部直径的精度和以便与精度较高的FP—12型光学测树仪进行比较;(2) 在次生花旗松密林中,确定用累高法及望远速测镜测定单株材积,胸高断面积及单株立木长度的实用性和成本等;(3)同时提出用累高法测定单株树木及用点抽样法 The purpose of this survey was to: (1) propose a telescopic teleconnection mirror (TSR) to improve the accuracy of the measured diameter of the upper trunk and to compare it with the more accurate FP-12 optical tree-logging instrument; (2) ) In secondary coniferous forest, to determine the use of cumulative height and telemetry to measure the single plant volume, the area of ​​the chest and the height of a single tree and the length of the utility and cost; (3) also proposed by the cumulative height method Single tree and point sampling method