不同经营方式对华北落叶松人工林林分生长的短期影响  

Short-Term Effects of Different Management Modes on Stand Growth of Larix Principis-Rupprechtii Plantation

作　　者：杨艳秋 李钢铁 闫民杰 刘龙 贾治 赵治伟 Yang Yanqiu;Li Gangtie;Yan Minjie;Liu Long;Jia Zhi;Zhao Zhiwei(College of Desert Management,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018,China)

机构地区：[1]内蒙古农业大学沙漠治理学院,内蒙古呼和浩特010018

出　　处：《绿色科技》2023年第7期119-124,共6页Journal of Green Science and Technology

基　　金：内蒙古自治区鄂尔多斯市科技重大专项(编号:2022EEDSKJZDZX012)。

摘　　要：为了研究不同森林经营方式对华北落叶松人工林林分生长的短期影响,本研究选取内蒙古赤峰市旺业甸林场华北落叶松人工林为对象,设置了落叶松中龄林近自然经营、中龄林常规经营、中龄林未经营、落叶松近熟林近自然经营、近熟林常规经营、近熟林未经营两类树种的3种经营措施,调查了旺业甸林场2013、2016、2019年三年树高、胸径、枝下高等,对比分析了不同经营模式下近自然经营、常规经营、未经营样地林分水平结构变化,林分蓄积量,胸径、胸高断面面积和单木材积生长量,探究了不同经营方式下林分生长动态。结果表明:不同经营方式下径阶树木比例增长量落叶松中龄林和近熟林均为近自然经营(5.85%、36.82%)最大;不同经营方式下6 a间总体蓄积量表现为,落叶松中龄林:未经营[13.74 m^(3)/(hm^(2)·a)]>近自然经营[10.73 m^(3)/(hm^(2)·a)]>常规经营[10.18 m^(3)/(hm^(2)·a)];落叶松近熟林表现为近自然经营最大;落叶松人工林6a间不同经营方式下林木单木生长量变呈现出近自然经营最大。In order to study the short-term effects of different forest management modes on the growth of Larix principis-rupprechtii Mayr plantation,this study selected the Larix principis-rupprechtii Mayr plantation in Wangyedian Forest Farm of Chifeng City,Inner Mongolia as the object,and set up three management measures of two kinds of tree species:near-natural management of middle-aged forest,conventional management of middle-aged forest,non-management of middle-aged forest,near-natural management of near-mature forest,conventional management of near-mature forest,and non-management of near-mature forest.The tree height,DBH and branch height of Wangyedian Forest Farm in 2013,2016 and 2019 were investigated,and the changes of stand horizontal structure under different management modes were compared and analyzed.Stand volume,DBH,chest height section area and single wood volume growth were explored to explore the growth dynamics of stands under different management modes.The results of the study are as follows:Under different management methods,the proportion of diameter class trees in larch middle-aged forests and near-mature forests is the largest in near-natural management(5.85%and 36.82%);the total volume of larch middle-aged forest under different management modes in 6 years was as follows:non-management[13.74 m^(3)/(hm^(2)·a)]>near-natural management[10.73 m^(3)/(hm^(2)·a)]>conventional management[10.18 m^(3)/(hm^(2)·a)];larch near-mature forest showed the largest near-natural management;the growth of individual trees in larch plantations under different management modes in 6a showed the largest change in near-natural management.

关 键 词：华北落叶松 经营方式 蓄积量 单木生长 

分 类 号：S791.22[农业科学—林木遗传育种]