大兴安岭天然偃松干长生长过程分析

Analysis of Trunk Growth Process of Pinus pumila in Daxing′anling

以大兴安岭呼中区天然偃松林为研究对象,用Logistic模型对天然偃松干长生长过程进行模拟试验。试验结果表明:偃松在120a前都保持高生长,但在60-70a生长速度最快。偃松的生长过程由生长曲线可划分为“慢-快-慢”3个生长阶段。最后认为Logistic模型能较好地拟合偃松树干生长过程,通过分析为偃松天然林集约经营提供参考。

Natural Pinus pumila forest in Huzhong of Daxing'anling was taken as the research object,this Logistic model was used to simulate the growth process of natural Pinus pumila in order to provide reference for intensive management of natural Pinus pumila forest.The result shows that Pinus pumila maintained a high growth rate before 120 years,but it grew fastest between 60 and 70 years.The growth process of Pinus pumila can be divided into three stages:slow-fast-slow.Finally,it is concluded that the Logistic model can well fit the growth process of the trunk of Pinus pumila.