文献类型：期刊文献

中文题名：典型中亚热带天然阔叶林各林层直径分布及其变化规律

英文题名：Diameter Distribution in Each Storey and Law of Typical Natural Broad-Leaved Forest in Mid-Subtropical Zone

作者：庄崇洋[1] 黄清麟[1] 马志波[1,2] 郑群瑞[3] 王宏[1]

第一作者：庄崇洋

通信作者：Huang, Qinglin

机构：[1]中国林业科学研究院资源信息研究所国家林业局林业遥感与信息技术重点实验室,北京100091;[2]中国林业科学研究院森林生态环境与保护研究所,北京100091;[3]建瓯万木林省级自然保护区管理处,南平353105

年份：2017

卷号：53

期号：4

起止页码：18-27

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;EI(收录号：20173003987944);Scopus(收录号：2-s2.0-85025656801);北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家自然科学基金项目“中亚热带天然阔叶林林层特征研究”(31370633)

语种：中文

中文关键词：中亚热带;典型天然阔叶林;分层;直径分布;变化规律

外文关键词：ⅢⅡⅠ mid-subtropical zone; typical natural broad-leaved forest; storey identification; diameter distribution; change law

分类号：S757.2

摘要：【目的】研究典型中亚热带天然阔叶林各林层直径分布及其变化规律,为揭示天然林结构、辅助天然林相关测树因子的调查和指导天然林经营规划奠定理论基础。【方法】采用最大受光面法划分5块中亚热带天然阔叶林林层,利用Shapiro-Wilk检验(S-W检验)对各林层(包括全林分和各亚层)直径分布进行正态性检验,采用偏度和峰度描述各林层直径分布图形特征,利用Meyer负指数函数和Weibull分布函数对各林层直径分布进行拟合,根据卡方检验结果选择拟合效果较好的函数拟合各林层直径分布,分析各林层直径分布及其变化规律。【结果】S-W检验表明,各标准地全林分、第Ⅲ亚层和第Ⅱ亚层直径分布均不服从正态分布;1-3号标准地第Ⅰ亚层直径分布服从正态分布,4和5号标准地第Ⅰ亚层直径分布不服从正态分布;各标准地内,各亚层的S-W值随亚层高度的升高而增大。从总体上看,除5号标准地第Ⅱ、Ⅲ亚层的偏度和峰度及2号标准地第Ⅰ、Ⅱ亚层的峰度外,各亚层偏度和峰度的绝对值均随林层高度的升高而减小。利用Meyer负指数函数拟合全林分(所有标准地均未通过卡方检验)和第Ⅱ亚层(2和4号标准地通过卡方检验,1、3和5号未通过)时适应性较差;而在拟合第Ⅰ亚层(所有标准地均通过卡方检验)和第Ⅲ亚层(3、4和5号标准地通过卡方检验,1和2号未通过)时有较好的适应性。Weibull分布函数对各林层的直径分布具有较好的拟合效果,除了1号标准地全林分直径分布外,1号标准地剩余亚层和其他标准地各林层均通过Weibull分布的卡方检验。利用Weibull分布函数拟合典型林分各标准地直径分布后发现,随着各亚层高度的升高,各亚层直径分布由倒"J"形曲线向右偏山状曲线和正态分布曲线过渡,顶峰向右移动,同时峰值随之减小。【结论】划分林层后,Weibull分布函数在拟合中亚热带天然阔叶林各林层(包括全林分和各亚层)直径分布时比Meyer负指数函数具有更好的拟合效果;各亚层S-W检验中P值、偏度和峰度以及Weibull函数中各亚层直径分布图形波峰的变化情况说明各亚层直径分布有随亚层平均胸径和平均高度增大而逐渐向正态分布过渡的趋势;各林层(包括全林分和各亚层)直径分布间的差异说明分林层研究直径分布的必要性。
[ Objective ] The diameter distribution and its changing law at storeys of typical natural broad-leaved forest in mid-subtropical zone was studied to provide the theoretical basis for revealing the structure, assisting the investigation of relevant stand description factors and directing the management planning of natural forests. [ Method ] Based on storey identification of maximum light receiving plane（MLRP） method, the Shapiro-Wilk（S-W test） test was used to measure the normality of the diameter distribution of storeys（ including the whole stand and each storey） ; the Skewness （SK） and Kurtosis（KT） were used to describe the characters of the diameter distributions; the Meyer negative exponential function and the Weibull distribution function were served to fit the diameter distribution of each storey ; the diameter distribution of each storey was charted by the model with better result of Chi-square test, and the changing law among storeys were analyzed. [ Result] The result of S-W test showed that all the whole stand, the substorey Ⅲ and the substorey Ⅱ of the typical natural broad-leaved forest in mid-subtropical zone were not normal distribution. As to the substorey Ⅰ , the diameter distribution of sample plot 1, 2 and 3 were the normal distribution, but the substorey Ⅰ of sample plot 4 and 5 were oppo; within each sample plot, the value of S-W test increased with the increasing substorey height. In general, the absolute value of SK and KT decreased with the height of substorey increased, except the SK and KT of the substorey Ⅱ and Ⅲ in sample plot 5 and the KT of the substorey Ⅰ and Ⅱ in sample plot 2. The Meyer negative exponential function could not fit the diameter distribution of the whole stand（ all the sample plots disobeyed the Chi-square test） and substorey Ⅱ （the sample plot 2 and 4 obeyed, and sample plotl, 3 and 5 disobey）well, but it could fit the substoreys I （all sample plots obeyed） and Ⅲ （ sample plot 3, 4 and 5 obeyed, and sample plot 1 and 2 disobey） well. The Weibull distribution function could fit the diameter distribution of storeys（including the whole stand storey and each substorey） better, except for the whole stand in sample plot 1, the surplus storeys in sample plot 1 and the storeys of the other sample plots all passed the Chi-square test. Used the Weibull distribution function fitted the diameter distribution of each storey in every sample plot, suggested that with the increase of storey height, the charts of storey changed from reverse ＂J＂ shape curve to right partial mountain curve and normal distribution curve, peak of curve moved to right, and the height of peak decreased. [ Conclusion ] The Weibull distribution function could fit the diameter distribution of each storey better than the Meyer negative exponential function at storeys （including the whole satand and each substorey） of typical natural broad- leaved forest in mid-subtropical zone. The results of S-W test, SK, KT and the status of the peak of curve shape at the chat of Weibull function indicated that the diameter distribution of each substorey in each sample plot was trend to transit gradually to normal distribution with the mean DBH and mean height of each substorey increased. The differences among the storeys （including the whole stand storey and each substorey） illustrated that the necessity of studying diameter distribution within storey identification.