马尾松人工速生丰产林林分生长模拟与最适密度管理技术研究

以固定样地观测和临时样地调查相结合的办法收集林分现实生长与经间伐或间伐设计后所保留群体的生长资料；以固定样地观测资料为依据，以林分平均胸径连年生长量及胸径度离散度的指标，确定不同地位指数林分间伐的起始年龄；采用Ｒｉｃｈａｒｄｓ函数模拟合理密度与生长水平下的林分平均树高及胸径生长；并采用间伐或间伐设计前，后林分生长标准的调查资料，以地位级指数，林林分平均胸径及胸径离散度为自变量建立起人工速生丰产林的

Growth mode and optimal density management Technology of fast - growing and high - yield planted forest of masson pine

Data of actual growth of stand and growth of stand after intermediate felling were obtained from the fixed sample plots and temporary sample plots. Based on the data collected from fixed sample plots, the intermediate felling age of stand with different site index was determined,which used the average annual - growth and discrete density of diameter at breast height as the indicator. By using of the Richards function, the optimal density and the average increment of height and diameter at breast height were simulated. Also, based on the stand growth of standard plot before and after felling, a mathematics mode of optimal density for planted fast - growing and high - yield forest was established. In the mode the site index, stand age, average diameter at breast height and the discrete density were the independent variables