为通过阔叶次生林的抚育措施达到培育大径材的目的,不仅要求开展问伐试验,而且要求研究问伐方法及预测收获,且研究所谓密度管理的方法。由于生产目标是大径材,所以用于人工林的平均直径和林分总量的计测方法不甚适用。就是说,不仅要求提供平均值,还要求提供某种径阶以上林木的 To achieve the goal of cultivating large diameter timber through tending of secondary broad-leaved forests, not only deforestation testing is required, but also debridement methods and forecast harvesting are required, and so-called density management methods are studied. Since the production target is large-diameter timber, the method of measuring the average diameter and total stand volume for plantations is not very suitable. In other words, not only is the average required, but also some kind of forest above a certain diameter