页岩山地川黄柏13年生人工林林分结构与生长量研究  

Study on Stand Structure and Growth of 13-year-old Phellodendron chinense Plantation in Shale Mountain

作　　者：向祖恒 何贤勤 彭先凤 阙小平 向明 黄正明 XIANG Zu-heng(Forestry Bureau of Longshan County,Longshan,Hunan 416800)

机构地区：[1]湖南省龙山县林业局,湖南龙山416800 [2]湖南省桑植县林业局,湖南桑植427100

出　　处：《园艺与种苗》2022年第4期18-20,24,共4页Horticulture & Seed

基　　金：湖南省2021年第一批地方标准制修订项目(湘市监标函[2021]33号)第287号。

摘　　要：[目的]调查研究页岩山地川黄柏 13 年生人工林的林分结构及林分生长量。[方法]在页岩山地选择生长良好的川黄柏人工林,设置 4 个 200 m^(2)临时样地,调查每木胸径、树高、分枝高、冠幅等因子。[结果]页岩山地 13 年生密度3 500~3 950 株 /hm^(2)的川黄柏人工林,林分胸径结构近于正态分布,树高结构呈不对称单峰山状曲线,林分处于中林阶段;林分胸径、树高、分枝高及冠幅面积平均值分别为 6.14 cm、7.40 m、4.08 m 及 4.88 m^(2);川黄柏冠幅面积与胸径显著正相关,与树高弱正相关,分枝高与树高正相关,与冠幅面积及胸径不相关;林分密度是影响川黄柏中大径木培育的关键因子。[结论]该林分冠幅面积、分枝高、胸径、树高变异系数大,林木分化严重,自然稀疏明显,亟待间伐抚育。[Objective] The aim of this study was to investigate the stand structure and stand growth of 13-year-old Phellodendron chinense plantation in shale mountain area. [Method] Four temporary plots of 200 m^(2)were set up in shale mountain area to investigate the factors such as DBH,tree height,branch height and crown width of each P. chinense tree. [Result] The DBH structure of 13-year-old P. chinense plantation with density of 3 500 -3 950 plants/hm^(2)in shale mountain area was close to normal distribution,and the tree height structure was asymmetric unimodal mountain curve. The stand was in the middle forest stage.Average DBH,tree height,branch height and crown area were 6.14 cm,7.40 m,4.08 m and 4.88 m^(2),respectively.The crown area of P. chinense was significantly positively correlated with DBH,weakly positively correlated with tree height,positively correlated with branch height,and not correlated with crown area and DBH.Stand density was a key factor affecting the cultivation of large-diameter trees in P. chinense. [Conclusion] The variation coefficient of crown area,branch height,DBH and tree height of the P. chinense plantation was large,the forest differentiation was serious,and the natural sparse was obvious,which needed thinning and tending.

关 键 词：页岩 林分结构 林分生长量 人工林 川黄柏 

分 类 号：S567.19[农业科学—中草药栽培]