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一、测树方法在山地实践中的一些问题历史上沿用的测树方法,是以立木基部为中心,按南北、东西两个相互垂直的方向,测定冠幅、胸径,标出解析木的径级测定线。其基本原理是:南北与东西两个方向之间,存在着光照强度和光照时间的明显差异,因而引起立木干形,树冠的相应变化。立木的定位方法,则用罗盘仪测定每株立木的距离和角度,转绘到图上;再以立木为中心,按相应立木的冠幅平均半径作圆,绘制树冠投影图。
First, the method of measuring trees Some problems in the practice of the mountain used in the history of tree measuring method is based on the base of the standing tree as the center, according to North-South, east-west two perpendicular to each other, the determination of crown width, diameter at breast height, Level determination line. The basic principle is: North-South and east-west direction, there is a significant difference between the light intensity and light time, which led to standing Trichosanthes, the crown of the corresponding changes. The positioning method of standing wood uses the compass to measure the distance and angle of each standing wood and then draws the picture on the picture. After that, taking the standing wood as the center, making the crown projected picture according to the average radius of the crown of the standing wood.