徐州侧柏林林分密度与林木生长关系的研究

A Study on Relationship between Stand Density and Growth of Platycladus orientalis Plantations in Xuzhou

以徐州市侧柏人工林为研究对象,研究50年生侧柏人工林不同经营密度与林分生长之间的关系规律。根据调查数据,绘制了不同密度侧柏林的径阶分布曲线;建立了胸径、单株材积、林分蓄积与密度的相关数学模型;并选出适合徐州石灰岩山地侧柏林生长的最优模型,为徐州市侧柏人工林的密度管理和林分生产力的预测提供科学依据。

Based on the data collected from the plots in Xuzhou, the relationship between stand density and average DHB, stand volume, VIS, height of Platycladus orientalis plantations of 50 years old were studied through a series of mathematical models. The results showed that the higher the stand density, the larger the number of small diameter trees, and the smaller the average DHB would be, and the smaller the average volume per plant. The stand volume increased with the increase of stand density, when the density is increased to a certain value, the volume gradually decline. There are some better models that are suitable for describing the stand growth of Platyeladus orientalis plantations in Xuzhou. And they could be used to conduct forest production such as thinning for Platycladus orientalis plantations and estimation of productivity.