邻体干扰模型在辽东油松人工林中的应用  

Application of neighborhood interference model in Pinus tabuliformis plantation in eastern Liaoning province

作　　者：杨霞 陈丽华[1] YANG Xia;CHEN Lihua(School of Soil and Water Conservation,Beijing Forestry University,100083,Beijing,China)

机构地区：[1]北京林业大学水土保持学院

出　　处：《中国水土保持科学》2019年第6期93-102,共10页Science of Soil and Water Conservation

基　　金：国家科技支撑计划“三北地区防护林体系结构定向调控技术研究与示范”(2015BAD07B03)

摘　　要：油松广泛分布于辽东地区,是该区主要的人工林之一。对抚顺县温道林场油松人工林邻体干扰模型进行探讨,为该区人工林生态系统的研究提供一定的量化依据,为人工林科学有效地管理经营和更新提供借鉴。2018年6月在温道林场进行了野外调查,以油松人工林为研究对象,对样地中基株和邻体的各因子进行实际测量,采用改进的邻体干扰模型计算邻体干扰指数,讨论干扰指数与基株胸径、树高、生境利用率、高径比的关系。结果表明:1)不同油松样地邻体干扰指数介于0.89~31.96,干扰指数随基株胸径、树高、生境利用率的增大而减小,随基株高径比增大而增大。2)林分密度对干扰指数也存在一定的影响。密度越大,林木干扰指数的波动范围就越大;反之亦然。3)幼小林木受邻体干扰程度较大,在资源和空间的争夺中处于劣势地位;而高大林木受干扰小,处于优势地位。4)干扰指数随胸径、树高、生境利用率以及高径比的变化都是在一定范围内,超过某个因子的一定范围时,便趋向于某个定值。林木干扰指数与胸径、树高、生境利用率均有极显著的相关性(P<0.01),而与高径比无明显相关性(P>0.05)。通过以上研究可以看出,邻体干扰模型能够确切的反应基株受邻体干扰的程度,是描述林木生长状况和地位的数量指标,可用来指导森林经营活动,为合理经营和水土保持提供依据。[Background]Pinus tabuliformis is widely distributed in eastern Liaoning province and is one of the main plantations in this area.This paper discusses the interference model of P.tabulaeformis plantation in Wandao Forest Farm of Fushun county,which provides certain quantitative basis for the study of plantation ecosystem in this area,and provides reference for the scientific and effective management and updating of plantation,and maximizes the ecological and economic benefits of plantation.[Methods]Field survey was conducted in Wandao Forest Farm in June 2018.Three sample plots of 20 m×20 m were set up with P.tabuliformis plantation as the research object.By adopting the fixed sample plot survey method,the factors of the cardinal tree and its adjacent body in the sample plot were actually measured.In this study,an improved neighborhood interference model was adopted to calculate neighborhood interference index,and the relationship between interference index and DBH,tree height,habitat utilization ratio(crown width area)and height-to-diameter ratio was discussed.[Results]1)The interference index of adjacent body of P.tabuliformis in different P.tabuliformis sample plots was between 0.89 and 31.96,and the interference index decreased with the increase of DBH,tree height and habitat utilization ratio,and increased with the increase of height-to-diameter ratio.2)Stand density also had some influence on interference index.The stand density of sample plot 1 was relatively large,thus the fluctuation range of interference index was larger,and the maximum interference index reached 31.96,the density of sample plot 2 and 3 was small,and the change of interference index was relatively stable.3)Young trees in stands were disturbed by neighbors and were in an inferior position in the competition for resources and space,and the tall trees were in a dominant position with little interference.4)The interference index varied with DBH,tree height,habitat utilization rate and height-diameter ratio within a certain range.When the i

关 键 词：邻体干扰模型 油松 人工林 辽东 

分 类 号：S157[农业科学—土壤学]