论文部分内容阅读
红皮云杉人工林,目前已成为我省重要的森林资源。对其经营水平的日益提高,要求不断进行资料调查和营林设计。以前,红皮云杉人工林的立木材积,都是查算红皮云杉天然林立木材积表,易造成误差。本文资料来源于绥棱林区设置的64块标准地。编表使用样木300株,平均树龄30年,胸径2—17cm,树高8—11m。编表采用先编二元材积表然后求算一元材积表的方法,以提高精度。全部计算在IBM-PC微机上完成。经材积表适用性检验,认为是可行的。
Red spruce plantations, has now become an important province of forest resources. Increasing the level of its management, requires continuous data surveys and forest design. In the past, the stand volume of red-spruce plantations were all reconstructed natural timber stands of spruce, which could lead to errors. The information in this paper comes from 64 standard places set in Suailing forest area. The table uses 300 samples of wood, the average age of 30 years, diameter 2-17cm, tree height 8-11m. The first series of tables compiled binary volume table and then calculate the method of one yuan volume table to improve accuracy. All calculations are done on the IBM-PC computer. It is feasible to test the applicability of volume chart.