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在开展中、幼龄林抚育和次生林改造工作中,做好抚育改造工作设计是一个重要环节。为了简化和改进作业设计办法,谨根据林业部调查规划院主编的《角规测树原理》及现行的《国有林场抚育改造作业设计施行办法》,提出利用角规进行次生林抚育改造作业设计的方法。现将具体方法分述如下:一、角规外业调查按照次生林抚育改造设计要求,在落实作业地点、划分作业小班、测求作业面积的基础上,利用角规进行林地小班因子调查。调查的程序是:(一)确定角规缺口宽度:按照林木平均胸高直径的大小,选用适宜的角规缺口宽度(见表1),角规杆长为50厘米。在坡地上,根据坡度,从表2确定杆长。
In carrying out medium and young-age forest tending and secondary forest rebuilding work, it is an important link to do well in tending and rebuilding work. In order to simplify and improve the operation design method, according to the principle of “angle measurement tree” edited by the Ministry of Forestry Survey Planning Institute and the current “Measures for the Design and Implementation of the Tending and Alteration of State-owned Forest Farms”, the paper proposes the method of tending and reconstructing homework using angle gauges . The specific methods are described as follows: I. Survey of angle gauging According to the design requirements of secondary forest tending and rebuilding, on the basis of carrying out the operation site, classifying the working small class and measuring the work area, angle factor surveys the small-scale factor of woodland. Investigation procedures are: (a) determine the angle gauge gap width: According to the average size of the forest chest diameter, select the appropriate angle gauge notch width (see Table 1), angle gauge rod length of 50 cm. On the slopes, determine the rod length from Table 2 based on the grade.