冀北山地华北落叶松人工林与天然次生油松林不同坡位生长状况研究  

Study of the growth of natural secondary forests of Larix gmellini(Rupr.) and plantations of Pinus tabulaeformis Carr in different slope positions in Mountain land in North Hebei

作　　者：袁明龙 姜韬 刘琳[2] 徐学华[2] 李玉灵[2] 

机构地区：[1]河北省木兰林管局,河北围场068450 [2]河北农业大学林学院,河北保定071000

出　　处：《河北林果研究》2011年第4期327-333,共7页Hebei Journal of Forestry and Orchard Research

基　　金：河北省科学技术研究与发展计划项目(10237136);国家林业局林业公益性行业科研专项项目(201104104);国家教育部留学回国人员基金资助项目(20071108)

摘　　要：在冀北木兰围场自然保护区内,通过对比华北落叶松[Larix gmellini(Rupr.)Rupr]人工林与天然次生油松(Pinus tabulaeformisCarr)林不同坡位的连年生长量与平均生长量,建立生长过程曲线方程并拟合树高与胸径之间的关系,分析两种林型内乔木树种的生长过程。结果表明:(1)落叶松人工林不同坡位样地内,标准木的拟合生长模型基本相似;材积连年及平均生长速率排序为:坡底落叶松>坡中落叶松>坡顶落叶松。(2)天然次生油松林不同坡位样地内材积平均生长量均随着年龄的增长而增加,油松标准木的生长过程基本相同,且标准木的拟合生长模型基本相似。但坡中油松立木材积平均生长量高于坡地和坡顶。(3)相同坡位样地内人工林与天然林间的连年生长曲线存在明显差异性。油松林生理年龄高于落叶松林,标准木达到材积数量成熟的年龄比落叶松大,单株立木材积量较大。(4)人工落叶松林和天然油松次生林内乔木树种的胸径与树高间存在密切的相关性,其相关系数均达到0.9以上。Abstract： The differences between current annual increment and annual increment in natural secondary forests of Pinus tabulaefonnis Can and plantations of Larix gmeUini （ Rupr. ） in Mulan Weichang Nature Reserve in North Hebei were studied by drawing the growth curves of different slope positions, simulating the relationship between height and diameter at breast height （DBH） and analyzing the tree growth process of two forest types. The results were as follows： （ 1 ） In the Larix gmellini sample plots of different slope positions, the fitting growth models of model tree were essentially similar; the order of years and average growth rate of the volume of timber was Larix gmellini in the base of slope 〉 Larix gmeUini in the middle slope 〉Larix gmellinid in the top of slope. （2） In the natural secondary Pinus tabulaeformis sample plots of different slope positions, the average increment of volume of timber all increased with age, and the process of growth of Pinus tabulaefonnis model trees and their fitting growth model were essentially equal. However, the average increment of Pinus tabulaeformis stumpage volume in the middle slope was greater than that in the base and top of slope. （3） The significant differences of current an- nual increment were surveyed in the plots of same slope position between the two forest types. The physiological age of Pinus tabulaeformis was older than that ofLarix gmellini, the age of model trees to volume quantity mature was older than Larix gmellini＇ s, and the Pinus tabulaefomnis had larger volume of single stumpage than Larix gmellini. （4） The tree DBH and Height in two forest types were closely related, with the correlation coetticient reaching more than 0.9.

关 键 词：人工落叶松林 天然次生油松林 连年生长量 平均生长量 

分 类 号：S718.557[农业科学—林学]