兴安落叶松与白桦混交林合理经营密度研究  

Rational Operating Density of Mixed Forest of Larix gmelinii and Betula platyphlla

作　　者：胡静杉 铁牛[1] HU Jing-shan;TIE Niu(Inner Mongolia Agricultural University,Forestry College of Inner Mongolia Agricultural University,Hohhot 010019,Inner Mongolia,China)

机构地区：[1]内蒙古农业大学林学院,内蒙古呼和浩特010019

出　　处：《西北林学院学报》2021年第2期180-185,共6页Journal of Northwest Forestry University

基　　金：大兴安岭火烧及采伐迹地幼苗更新和植被恢复影响机制及抚育技术(2017YFC0504003-2);大兴安岭白桦次生林生态修复关键技术研究与示范(2020GG0067)。

摘　　要：为确定兴安落叶松与白桦混交林的合理经营密度,运用半峰宽原理计算小、中、大不同径级的林分合理经营密度。结果表明:1)利用胸径与冠幅的相关关系,拟合发现白桦以线性函数效果最好,而兴安落叶松以二次函数效果最好。2)建立不同径级层林分的最大密度模型,通过拟合发现各径级胸径与最大林分密度以指数函数效果最佳。3)通过半峰宽公式计算出小、中、大径级层林分合理经营密度区间分别为0.434~1.336、0.725~2.057 N_(max)和0.645~1.469 N_(max),最小到最大合理经营密度株数配比在5∶3∶2、6∶3∶1、7∶2∶1等比例之间变化。In order to determine the reasonable management density of mixed forest of Larix gmelinii and Betula platyphlla,the principle of peak width at half height was adopted to calculate the reasonable management densities of the stands with different diameter classes(small,medium,and large).The results showed that 1)by using the correlationship between the diameter at breast height(DBH)and crown width,linear function was suitable to simulate B.platyphlla,while quadratic function was the best choice to simulate L.gmelinii.2)The maximum density models for the stands with different diameter classes were established.It was found by simulation that exponential function was most suitable.3)The reasonable management densities of the stands with different diameter classes that were calculated by the formula of peak width at half height for small diameter class ranged from 0.403-1.336 N_(max),0.725-2.057 N_(max) for medium diameter class,and 0.645-1.469 Nmax for large diameter class.The proportions between the small-,medium-,and large-diameter trees varied among 7∶2∶1,6∶3∶1,and 5∶3∶2.

关 键 词：针阔混交林 半峰宽原理 林分最大密度模型 合理经营密度 森林经营 

分 类 号：S757[农业科学—森林经理学]