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测算立木材积生长率的方法很多,目前较常用的是施耐德(Schneider)公式p_V=K/n·d普来斯勒(Pressler)公式p_V=(v_b-v_a)/(v_b+v_a)·(200)/n和材积差法。这三种方法,是以各自的工作效率和测算精度相互补益而被广泛采用的。其中以施耐德公式方法最简单,但是由于K值在400～800之间,常因确定不当影响测算精度;材积差法的计算精度较高,但计算过程最复
There are many ways to measure the growth rate of standing timber volume. Currently, Schneider’s formula p_V = K / n · d is used. Pressler’s formula p_V = (v_b-v_a) / (v_b + v_a) ) / n and volume difference method. These three methods are widely used in their respective efficiency and accuracy of measurement complement each other. Among them, Schneider’s formula method is the simplest, but because of the K value between 400 and 800, often due to improperly determine the accuracy of the measurement; the accuracy of the volume difference method is higher, but the calculation process is the most complex