华北落叶松人工林直径分布规律及其动态的研究

Study on the diameter distribution laws and its dynamics of Larix principis, rupprechtii Mayr plantation

以山西省现场调查的30块华北落叶松（Larix principis．rupprechtii Mayr）人工林临时标准地为材料，利用Weibull分布密度函数对林分的直径分布进行模拟和预测。检验结果表明：86．67％的服从Weibull分布，拟合效果良好，并据此建立起了a、b、c参数的预测模型。理论参数方程可用于华北落叶松人工林经营管理的实践中，为合理经营华北落叶松人工林提供了科学的理论依据。

On the basis of the investigation of 30 standard plots of Larix principis, rupprechtii Mayr plantation for- est in Shanxi province, distribution density function had been used to imitate and predict the diameter distribu- tion of Larix principis, rupprechtii Mayr plantation. According to the test result： 86.67% of the laws of Larix prin- cipis, rupprechtii Mayr plantation＇s diameter followdistribution, the fitting effect was fine and forecast models with a, b and c were establlished. Theoretical parameters can be applied to practice of management of Larix principis. rupprechtii Mayr plantation , a scientific theory for managing Larix pr/ncipis, rupprechtii Mayr properly was provided.