文献类型：期刊文献

中文题名：典型中亚热带天然阔叶林林木高径比与胸径及树高关系

英文题名：The Relationship Between Height-to-diameter Ratio and DBH and Tree Height in Typical Natural Broad-leaved Forests in Mid-subtropical Zone

作者：严铭海[1,2] 王金池[1,2] 黄清麟[1,2] 庄崇洋[3] 郑群瑞[4] 卓鸣秀[4] 官晓辉[4]

第一作者：严铭海

机构：[1]中国林业科学研究院资源信息研究所,北京100091;[2]国家林业和草原局森林经营与生长模拟重点实验室,北京100091;[3]福建农林大学林学院,福建福州350002;[4]建瓯万木林省级自然保护区管理处,福建建瓯353105

年份：2022

卷号：35

期号：5

起止页码：81-88

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：中国林业科学研究院中央级公益性科研院所基本科研业务费专项资金重点项目“中亚热带人工林转天然阔叶林的关键技术研究”(CAFYBB2017ZC002)。

语种：中文

中文关键词：中亚热带天然阔叶林;分层;林木高径比;林木高径比特征

外文关键词：natural broad-leaved forest in the mid-subtropical zone;stratification;tree height-to-diameter ratio;characteristics of the tree height-to-diameter ratio

分类号：S758.5

摘要：[目的]揭示典型中亚热带天然阔叶林各林层林木高径比与胸径及树高的关系特征,为中亚热带人工阔叶林、半天然林和天然阔叶林可持续经营提供参考。[方法]在建瓯万木林省级自然保护区内5个最典型中亚热带天然阔叶林分中,分别设置50 m×50 m的样地,运用Spearman秩相关系数分析典型林分各林层林木高径比与胸径及树高的相关性,选用指数函数和双曲线函数拟合各林层林木高径比与胸径关系曲线。[结果]5个样地全林林木高径比平均值为103.1,各亚层高径比平均值排序为:第Ⅲ亚层(112.7)>第Ⅱ亚层(89.0)>第Ⅰ亚层(66.9);各亚层最小值与最大值排序与其平均值排序一致。各样地各林层林木高径比与胸径均呈现极显著负相关且相关系数都较高,相关系数绝对值第Ⅰ亚层(0.896~0.961)和第Ⅱ亚层(0.912~0.971)最高,全林(0.613~0.749)居中,第Ⅲ亚层(0.415~0.596)最低;各样地各林层林木高径比与树高的关系较为复杂且相关系数绝对值都较低(0.020~0.480)。采用指数函数拟合第Ⅰ亚层、第Ⅱ亚层林木高径比与胸径关系曲线的R~2分别为0.852~0.906和0.830~0.914,而拟合全林分和第Ⅲ亚层的R~2分别为0.465~0.575和0.202~0.399;采用双曲线函数拟合第Ⅰ亚层、第Ⅱ亚层林木高径比与胸径关系曲线的R~2分别为0.874~0.937和0.856~0.968,而拟合全林分和第Ⅲ亚层的R~2分别为0.387~0.536和0.186~0.350;指数函数拟合全林分和第Ⅲ亚层林木高径比-胸径关系的R~2相对较高,RMSE和AMR相对较小,而双曲线函数拟合第Ⅰ亚层和第Ⅱ亚层林木高径比-胸径关系的R~2相对较高,RMSE和AMR相对较小。[结论]典型中亚热带天然阔叶林林木高径比会因所属亚层的不同而变化,因此有必要分亚层来探讨林木高径比与胸径及树高关系;同一亚层的林木高径比也会因胸径不同而变化,各林层林木高径比与胸径均呈现极显著负相关且相关系数都较高,其关系曲线拟合是有意义且必要的;双曲线函数能很好地描述第Ⅰ亚层和第Ⅱ亚层的关系曲线,指数函数更适合描述全林分和第Ⅲ亚层的关系曲线;各林层林木高径比与树高的关系较为复杂且相关系数都较低,其关系曲线拟合是没有意义的;典型中亚热带天然阔叶林林木高径比特征需要且可以采用各林层林木高径比与胸径的关系曲线来表达。
[Objective]To provide a typical reference in the aspect of height-to-diameter ratio of broadleaved trees for the sustainable management of artificial broad-leaved forest,semi-natural broad-leaved forest and natural broad-leaved forest in mid-subtropical zone,the relationship between tree height-todiameter ratio and DBH and tree height were revealed in each stratum of typical natural broad-leaved forests.[Method]In Jian’ou Wanmulin Provincial Nature Reserve,50 m×50 m plots were set up in 5most typical natural broad-leaved forest in mid-subtropical zone respectively.Spearman rank correlation coefficient was used to analyze the correlation between tree height-to-diameter ratio and DBH and tree height in each stratum,and exponential function and hyperbola equation were chosen to fit the relationship between height-to-diameter ratio and DBH in each stratum.[Results]The variation range of the average value of the height-to-diameter ratio in each stratum was not large.The average height-to-diameter ratio of the stand in the 5 sample plots was 103.1.The mean height-to-diameter ratio in stratumⅢ(112.7)was the largest,followed by stratumⅡ(89.0)and stratumⅠ(66.9),as well as in the minimum and maximum values.The height-to-diameter ratio of each stratum showed a significant negative correlation with DHB and the correlation coefficient was high.The absolute value of correlation coefficient was the highest in stratumⅠ(0.896~0.961)and stratumⅡ(0.912~0.971),the middle in the stand(0.613~0.749),and the lowest in stratumⅢ(0.415~0.596).The relationship between tree height-to-diameter ratio and tree height in each stratum was complex and the absolute value of correlation coefficient was low(<0.480).The stand showed extremely negative correlation,but the absolute value of correlation coefficient was low(0.283~0.458).The R~2 of the tree height-to-diameter ratio and DBH in stratumⅠand stratumⅡfitted by exponential function were 0.852~0.906 and 0.830~0.914,respectively,while the R~2 of the stand and stratumⅢwere0.465~0.575 and 0.202~0.399,respectively.The R~2 of the height-to-diameter ratio and DBH in stratumⅠand stratumⅡfitted by hyperbolic curve were 0.874~0.937 and 0.856~0.968,respectively,while the R~2of the stand and stratumⅢwere 0.387~0.536 and 0.186~0.350,respectively.Exponential function fitting stand and stratumⅠrelationship of DBH than height-to-diameter ratio of R~2 was relatively high,and RMSE and AMR was relatively small.hyperbola from fitting relationship of DBH than height-to-diameter ratio stratumⅠand stratumⅡfitted by hyperbola equation had relatively high R~2 and small RMSE and AMR was values.[Conclusion]The tree height/diameter ratio of typical natural broad-leaved forest in midsubtropical zone varies with the stratum.The tree height/diameter ratio in the same stratum also varies with DBH.The height-to-diameter ratio and DBH in each stratum shows a very significant negative correlation and the correlation coefficient is high,and the curve fitting of the relationship is significant.Hyperbolic function can well describe the relationship between height-to-diameter ratio and DBH in the stratumⅠand stratumⅡ,while exponential function is more suitable to describe the relationship between height-to-diameter ratio and DBH in the stand and the stratumⅢ.The relationship between tree height-todiameter ratio and tree height in each stratum is complex and the correlation coefficient is low.In the typical natural broad-leaved forest of the mid-subtropical zone,the characteristics of tree height/diameter ratio can be expressed by the relationship curve between tree height to diameter and DBH of each stratum.