金沟岭云冷杉针阔混交林林分结构研究  

Study on forest structure of coniferous and broad-leaved mixed forest in Jingouling Forest Farm of Wangqing county of Jilin province

作　　者：韩金[1] 王新杰[1] 段皓赟 HAN Jin;WANG Xinjie;DUAN Haoyun(Key Lab. of Silviculture and Conservation of China Education Ministry,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《中南林业科技大学学报》2019年第1期58-63,共6页Journal of Central South University of Forestry & Technology

基　　金：国家重点研发计划项目"云冷杉针叶林抚育更新技术"(2017YFC050410101)

摘　　要：以吉林汪清金沟岭林场1 hm2云冷杉针阔混交林数据为研究基础,对样地内树种组成、直径结构以及树种的空间分布结构进行分析。结果表明:1)优势物种云杉Abies nephrole-pis、冷杉Picea koraiensis、枫桦Betula costata大径阶的单木占多数,云冷杉的峰度值小于0,直径分布较为分散,枫桦峰度值大于0,直径分布比较集中。在物种的胸径分布格局解释上,负指数模型的解释程度要优于Weibull模型。2)该群落树种的平均角尺度为0.545,空间分布格局呈聚集分布,3种优势树种的平均角尺度为0.475～0.517,呈现随机分布特征。3)云杉、枫桦的平均混交度较高,而冷杉的平均混交度相对较低。4)样地所有物种的平均大小比数为0.496,3种主要树种的平均大小比数排序为云杉<冷杉<枫桦,表明云杉竞争力最大,冷杉次之,而枫桦的竞争力最小。该林分结构较为复杂,群落内树种以聚集分布为主,所以应调整林分林木分布格局,促进林木向随机分布格局发展,同时伐除上层的"霸王树"以及病腐木、弯曲树等处于竞争劣势的林木,将混交度维持在中度混交,从而尽可能保留维持群落的物种多样性。In order to provide a theoretical basis for rational forest management,based on the data of1hectare spruce-fir mixed forest in Jingouling Forest Farm in Wangqing,Jilin province,the composition of tree species,diameter structure and spatial distribution structure of tree species in the plot were investigated.The model structure of species diameter was analyzed by using model fitting.The spatial structure parameters analysis was done by selecting3indicators:angular dimension,mixed degree,and size ratio.The findings were as follows.1)The dominant species,Abies nephrole-pis,Picea koraiensis and Betula costata,were dominated by single trees with high diameter;A.nephrole-pis and P.koraiensis had a kurtosis value of less than0and the diameter distribution was more dispersed;the kurtosis value of B.costata was greater than0and the diameter distribution was more concentrated;On the interpretation of DBH distribution pattern of the species,the negative exponential model was better than the Weibull model.2)The average angular dimension of the tree species in the community was0.545,the spatial distribution pattern was clustered,and the average angular dimension of the three dominant tree species was in within the scope of0.475-0.517,showing a random distribution characteristic.3)The average mixed degrees of A.nephrole-pis and B.costata were higher,while the average mixed degree of P.koraiensis was relatively lower.4)The average size ratio of all species in the plots was0.496,the average size ratio values of the three main tree species ranked from small to large as B.costata,P.koraiensis and A.nephrole-pis,which indicated that A.nephrole-pis had the highest competitiveness,followed by P.koraiensis,and B.costata had the least competitive.It comes to a conclusion that the structure of the stand was rather complicated,the tree species distribution in the community was an aggregation distribution,therefore,the distribution pattern of stand should be adjusted so as to promote the development of trees to random distribution pattern

关 键 词：云杉 冷杉 枫桦 针阔混交林 树种组成 直径结构 树种空间分布结构 金沟岭林场 吉林汪清 

分 类 号：S758.53[农业科学—森林经理学]