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两种典型中亚热带单优群落林木高径比特征

Characteristics of Height to Diameter Ratio of Two Typical Mono-Dominant Forest Communities in Mid-Subtropical Zone
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摘要 [目的]揭示只能划分两个亚层的两种典型中亚热带单优群落林木高径比特征,验证其是否与可以划分3个亚层的典型中亚热带天然阔叶林的一致。[方法]在三明格氏栲省级自然保护区内200多年生格氏栲单优群落中设置2个50 m×50 m的样地以及在建瓯万木林省级自然保护区内50多年生米槠单优群落中设置1个20 m×60 m的样地,运用Mann-Whitney U检验、偏度和峰度指标、正态分布函数、Weibull函数、Spearman秩相关系数、指数函数和双曲线函数分析只能划分两个亚层的中亚热带单优群落林木高径比特征。[结果]只能划分两个亚层的格氏栲和米槠单优群落各林层林木高径比随亚层高度升高而减小,受光层与非受光层之间的林木高径比平均值均有极显著差异(p<0.01),有必要分亚层来分析单优群落林木高径比特征;运用正态分布函数拟合各林层林木高径比分布的结果基本通过卡方检验,各林层林木高径比分布为右偏,各林层林木高径比分布基本呈正态分布;各林层林木高径比与胸径呈现极显著负相关且相关系数较高,相关系数绝对值的排序依次为:受光层(0.849~0.936)>全林分(0.741~0.881)>非受光层(0.484~0.550),各林层林木高径比与树高的关系有所差异且相关系数绝对值相对较低,各林层林木高径比特征可以采用各林层林木高径比与胸径的关系曲线来表达。[结论]只能划分两个亚层的两种典型中亚热带单优群落林木高径比特征与可以划分3个亚层的典型中亚热带天然阔叶林的基本一致,反映出中亚热带天然阔叶林林木高径比特征具有相同的规律性。 [Objective]To reveal the characteristics of HDR(height to diameter ratio)in two typical monodominant forest communities in mid-subtropical zone that can only be divided into two stratum,to verify whether it is consistent with the typical natural broad-leaved forest in mid-subtropical zone that can divide into the three stratum.[Method]Two plots of 50 m×50 m and one plot of 20 m×60 m were set up in more than 200 years old mono-dominant forest communities of Castanopsis kawakamii in Sanming Castanopsis kawakamii Provincial Nature Reserve and more than 50 years old mono-dominant forest communities of Castanopsis carlesii in Jian’ou Wanmulin Provincial Nature Reserve,respectively.Using Mann Whitney U test,skewness and kurtosis indicators,normal distribution function,Weibull Spearman rank correlation coefficient,exponential function,and hyperbolic function to analyze the HDR characteristics of mono-dominant forest communities in mid-subtropical zone that can only be divided into two stratum.[Result]The results showed that the HDR of Castanopsis kawakamii and Castanopsis carlesii mono-dominant forest communities which can only be divided into two stratum,decreased with the increase of stratum height.There was a significant difference in the average HDR between the Light Receiving Layer and the Non-Light Receiving Layer(p<0.01).It is necessary to explore the characteristics of HDR of monodominant forest communities in each storey.Using normal distribution function to fit the distribution of HDR in each stratum,the results basically passed the chi square test.The distribution of HDR in each stratum was right-skewed.The distribution of HDR in each storey was basically normal.The correlation between HDR and DBH in each storey showed an extremely significant negative correlation y and the correlation coefficient was high.The order of absolute values of correlation coefficient was:light receiving layer(0.849~0.936)>whole stand(0.741~0.881)>non-light receiving layer(0.484~0.550).The relationship between HDR and tree height in each storey was complicated and the correlation coefficient was low.The characteristics of the HDR of mono-dominant forest communities in mid-subtropical zone at community(stand)level needed to be explored in each storey.The distribution of HDR in each storey was basically normal.The correlation between HDR and DBH in each storey in the mono-dominant forest communities in mid-subtropical zone showed an extremely significant negative correlation and the correlation coefficient was high.The relationship between HDR and tree height was different in each storey and the correlation coefficient was low.The characteristics of HDR in each storey could be expressed by the relationship curve between HDR and DBH in each storey.[Conclusion]The characteristics of HDR of two typical mono-dominant forest communities in mid-subtropical zone that can be divided into two stratums are basically the same as those of typical natural broad-leaved forest in mid-subtropical zone that can be divided the three stratum.It reflects that the characteristics of HDR of natural broad-leaved forest in mid-subtropical zone have the same regularity.
作者 严铭海 王少杰 黄清麟 张纪元 王金池 庄崇洋 郑群瑞 YAN Ming-hai;WANG Shao-jie;HUANG Qing-lin;ZHANG Ji-yuan;WANG Jin-chi;ZHUANG Chong-yang;ZHENG Qun-rui(Key Laboratory of Forest Management and Growth Modelling of National Forestry and Grassland Administration Institute of Forest Resource Information Techniques,Chinese Academy of Forestry,Beijing 100091,China;Fujian Academy of Forestry,Fuzhou 350012,Fujian,China;Industry Development and Planning Institute,National Forestry and Grassland Administration,Beijing 100091,China;International Center for Bamboo and Rattan,Beijing 100102,China;Central South Inventory and Planning Institute of National Forestry and Grassland Administration,Changsha 410014,Hunan,China;Forestry College of Fujian Agriculture and Forestry University,Fuzhou 350002,Fujian,China;Administrative Office of Jian’ou Wanmulin Provincial Nature Reserve Jian’ou 353105,Fujian,China)
出处 《林业科学研究》 CSCD 北大核心 2024年第6期121-127,共7页 Forest Research
基金 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(CAFYBB2023ZA007)。
关键词 中亚热带 单优群落 格氏栲 米槠 林木高径比 mid-subtropics mono-dominant community Castanopsis kawakamii Castanopsis carlesii HDR
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