华北落叶松人工林生长规律研究

Study on the growth patterns of Larix principis-rupprechtii plantation

以河北省塞罕坝华北落叶松(Larix principis-rupprechtii Mayr.)人工林为研究对象,收集大量临时样和解析木地调查资料,利用不同的生长模型对华北落叶松人工林生长过程进行拟合,以找到最优模型,计算各生长指标。结果表明:Logistic模型模拟华北落叶松人工林胸径、树高、材积生长过程效果最好,抛物线方程拟合林分立木株数随年龄变化过程效果最好;华北落叶松人工林胸径年平均生长量为0.46cm,速生期为10～20年;树高年平均生长量为0.38m,速生期为前20年;材积年平均生长量为0.006 90m3,速生期为10～30年,数量成熟龄为43年,为华北落叶松人工林的经营和管理提供科学依据。

It is very important for forestry management officials to understand and grasp the forest growth systematically. Based on the data collected from experimental sample plots and analytical trees of Larix principis-rupprechtii plantation in Saihanba, Excel, SPSS11.0 and Forstat are used to simulate the growth process of main stand factors to understand forest growth patterns. The results showed that Logistic Model is the best model for describing the DBH, hight and volume growth of Larix principis-rupprechtii, and the parabola model is best for describing the relationships between tree number and stand age. Mean annual DBH incre- ment of Larix principis-rupprechtii is 0.46 cm, and 10-20 years are the speeding period of DBH growth. Mean annual height increment is 0.38 m, and the first 20 years are the speeding growth period. Mean annual volume increment is 0. 006 90 m3 , and 10-30 years are the speed- ing growth period, the quantitative maturity age is 43 years.