杉檫人工林中檫树生长规律研究

Study on the Growth Regularity of Sassafras Tsumu in Cedarwoodand Sassafras Tsumu Plantation

本文以40年生杉檫人工林为研究对象,测定林分生长量,研究檫树生长规律。结果表明:杉檫人工林林分蓄积量373.24 m~3/hm~2,檫树居上层,平均树高27.8 m、平均胸径25.6 cm,材积0.648 33 m~3,适宜培育大径材。檫树早期生长快、生长周期持续时间长,25年生材积生长达到数量成熟;35年生材积连年生长量达到最高峰。

This article took a 40 year old Cedarwood and sassafras tsumu plantation as the research object,we measured the growth amount of the forest,and studied the growth law of sassafras tsumu.The results showed that the stand volume of the cedarwood and Sassafras tsumu plantation was 373.24 m 3/hm 2,with Sassafras tsumu occupying the upper layer,with an average height of 27.8 meters,an average diameter at breast height of 25.6 cm,and a volume of 0.64833 m 3,making it suitable for cultivating large-diameter timber.Sassafras tsumu growed quickly in the early stages and had a long growth cycle.The volume growth at 25 years old reached quantitative maturity;The annual growth of 35 year old volume reached its peak.