典型中亚热带天然阔叶林各林层林木高径比分布规律

doi:10.11707/j.1001-7488.LYKX20210632

Abstract

Abstract:

Objective: To reveal the distribution law of tree height-to-diameter ratio in each stratum of typical natural broad-leaved forest in mid-subtropical zone, to provide a typical reference in the aspect of height-to-diameter ratio of broad-leaved trees for the sustainable management of artificial broad-leaved forest, semi-natural broad-leaved forest and natural broad-leaved forest in mid-subtropical zone. Method: In Jian’ou Wanmulin provincial nature reserve, 50 m×50 m plots were set up in 5 typical natural broad-leaved forest in mid-subtropical zonerespectively. Themean tree height-to-diameter ratio and standard deviation of each stratum in the typical stand was calculated to analyze its changes with the stratum, and the Mann-Whitney U test was used to analyze the significance test of the difference between the average height-to-diameter ratio in each stratum. Skewness and kurtosis are used to describe the degree of deviation and dispersion of the height-to-diameter ratio distribution. The normal distribution and Weibull distribution function were selected to fit the distribution of the height-to-diameter ratio of each stratum in each plots, and the fitting effect was tested by χ² test. Result: The mean tree height-to-diameter ratio in 5 sample plots was integrated, the mean tree height-to-diameter ratio of the whole stand was 103.1, and the mean tree height-to-diameter ratio of each stratum decreased with the increase of the stratum height. The order and value were as follows: the stratum Ⅲ (112.7) > the stratum Ⅱ (89.0) > stratum Ⅰ (66.9)and NLRS(112.7) > LRS(78.3).The mean tree height-to-diameter ratio between the stratum Ⅱ and stratum Ⅲ in plot 4 was significantly different, and the average height to diameter ratio of trees between stratum in other plots was extremely significant.The results of skewness showed that the tree height-to-diameter ratio of each stratum was skewed to the right. The variation of skewness of the tree height-to-diameter ratio in each stratum was irregular.The normal distribution function was used to fit the distribution of tree height-to-diameter ratio of each stratum, and all the results passed the Chi-square test. However, most of the results of Weibull distribution function did not pass the Chi-square test. Conclusion: In the typical natural broad-leaved forest of the mid-subtropical zone,the tree mean height-to-diameter ratio of each stratum has an extremely significant difference, and the tree mean height-to-diameter ratio decreases with the increase of the stratum height.The distribution of tree height-to-diameter ratio in each stratum was right skewed. The tree height-to-diameter ratio of the whole stand and the stratum Ⅰ was relatively dispersed, while the stratum Ⅱ and stratum Ⅲ were relatively concentrated. The fitting effect of normal distribution function on tree height-to-diameter ratio of each stratum was good, but the fitting effect of Weibull distribution function was not ideal.In the typical natural broad-leaved forest of the mid-subtropical zone, the height-to-diameter ratio distribution was significantly different from that of diameter distribution. The height-to-diameter ratio distribution of the whole forest and the stratum Ⅲ was normal, but the diameter distribution of the whole forest and the stratum Ⅲ was inverted J. The average height/diameter ratio in each stratum and the distribution of height/diameter ratio in each stratum reflected in this study belong to the height/diameter ratio characteristics under ideal circumstances.

Key words: mid-subtropics, typical natural broadleaved forest, stratification, tree height-to-diameter ratio distribution, change law

CLC Number:

S757

Minghai Yan,Jinchi Wang,Qinglin Huang,Chongyang Zhuang,Qunrui Zheng,Mingxiu Zhuo,Xiaohui Guan. Distribution Law of Tree Height-to-Diameter Ratio in Each Stratum of Typical Natural Broad-Leaved Forest in Mid-Subtropical Zone[J]. Scientia Silvae Sinicae, 2023, 59(4): 149-156.

Figures/Tables 5

Table 1

Table 2

Table 3

Skewness and kurtosis, fitting and test results of tree height-to-diameter ratio distribution in each stratum"

样地号 Sample plot	层属 Stratum	偏度 SK	峰度 KT	正态分布Normal distribution			Weibull分布函数Weibull distribution function
				参数Parameters		卡方值 Chi-square value	参数Parameters			卡方值 Chi-square value
				μ	σ	χ²	a	b	c	χ²
1	S	?0.10	?0.49	108.036	28.374	18.264^*	39.900	76.987	2.674	21.213
	Ⅰ	0.67	?0.42	77.556	24.323	10.301^*	39.900	44.353	1.785	8.894^*
	Ⅱ	0.16	0.03	101.500	23.044	3.343^*	59.900	50.711	2.363	6.968^*
	Ⅲ	?0.06	?0.35	116.410	24.942	16.171^*	59.900	64.797	2.623	26.988
	L	0.28	?0.59	88.824	26.476	5.977^*	39.900	56.478	2.064	7.952^*
2	S	0.62	1.21	97.193	32.121	13.813^*	29.900	76.507	2.266	11.806^*
	Ⅰ	0.81	0.99	57.391	18.882	0.650^*	29.900	28.741	1.600	2.367^*
	Ⅱ	0.49	?0.17	82.128	22.061	7.462^*	39.900	48.749	2.176	6.258^*
	Ⅲ	0.84	1.93	107.468	29.882	18.855^*	39.900	75.536	2.626	14.681^*
	L	0.47	?0.12	74.000	23.981	5.543^*	29.900	83.437	2.489	11.028^*
3	S	0.20	?0.12	103.811	32.184	10.909^*	29.900	83.437	2.489	11.028^*
	Ⅰ	1.00	1.00	63.200	17.009	2.217^*	39.900	28.510	1.723	1.917^*
	Ⅱ	0.61	0.33	77.436	25.206	4.560^*	29.900	54.984	2.139	4.002^*
	Ⅲ	0.38	0.36	113.980	27.678	7.843^*	49.900	72.774	2.556	8.930^*
	L	0.86	0.71	71.875	23.291	6.469^*	29.900	48.141	1.988	2.836^*
4	S	0.16	?0.01	100.906	33.630	16.192^*	29.900	80.455	2.273	22.689
	Ⅰ	0.53	?0.48	69.231	21.679	6.985^*	39.900	38.162	1.828	40.916
	Ⅱ	0.45	0.16	97.727	37.662	4.333^*	29.900	80.037	2.155	5.167^*
	Ⅲ	0.19	0.73	112.337	28.293	12.096^*	49.900	72.009	2.549	28.299
	L	1.08	1.53	77.703	30.139	10.444^*	29.900	54.397	1.715	6.356^*
5	S	0.19	?0.16	104.235	31.084	10.569^*	29.900	83.808	2.600	13.055^*
	Ⅰ	0.14	?1.29	65.556	16.946	3.590^*	39.900	32.565	2.073	8.144
	Ⅱ	?0.11	0.53	86.364	23.830	6.151^*	29.900	64.519	2.788	8.606^*
	Ⅲ	0.32	?0.21	114.185	27.746	10.113^*	49.900	72.737	2.534	7.882^*
	L	0.20	0.00	78.451	23.643	8.199^*	29.900	55.424	2.272	8.785^*

Table 3

Fig.1

Table 4

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样地号Sample plot	群落类型 Community type	种丰富度Species richness	SW指数 Shannon- Wiener index	平均胸径Mean DBH/cm	平均树高Mean height/m	密度 Density/ (individual·hm^?2)	蓄积量 Volume/ (m³·hm^?2)
1	木荷+光叶山矾 Schima superba+Symplocos lancifolia	36	3.82	21.0	26.8	1164	481.7
2	猴欢喜+木荷 Sloanea sinensis+Schima superba	50	4.56	25.7	27.9	952	591.5
3	木荷+新木姜子 Schima superba+Neolitsea aurata	49	4.83	22.0	23.9	1076	435.4
4	木荷+浙江桂 Schima superba+Cinnamomum chekiangense	45	4.51	23.6	24.1	1056	493.3
5	浙江桂+木荷 Cinnamomum chekiangense+Schima superba	45	4.47	21.9	25.2	1056	443.0

样地号Sample plot	S	Ⅰ	Ⅱ	Ⅲ	L
1	108.0±28.1	78.2±23.9A	101.4±23.1B	116.2±24.7C	89.1±26.4D
2	97.2±31.8	58.1±18.6A	82.2±22.1B	107.4±29.4C	74.3±24.0D
3	103.8±32.1	62.8±16.6A	77.7±24.6B	114.0±27.6C	71.8±23.2D
4	102.2±32.4	69.4±21.1A	97.8±36.9Bb	112.0±28.0Bc	77.8±30.0D
5	104.1±30.9	66.1±17.5A	85.9±23.6B	114.0±27.5C	78.4±23.7D

层属Stratum	对象Object	偏度SK		峰度KT		分布曲线形状 Distribution curve shape	卡方检验 Chi-square test
层属Stratum	对象Object	正负Positive or negative	绝对值Absolute value	正负 Positive or negative	绝对值Absolute value	分布曲线形状 Distribution curve shape	卡方检验 Chi-square test
S	林木高径比分布 Height/diameter ratio distribution	正Positive	≤1	基本为负 Basically negative	≤1	正态分布曲线 Normal distribution curve	通过 Pass
S	直径分布 Diameter distribution	正Positive	>1	正Positive	>1	反J形曲线 Inverse J-shaped curve	基本通过 Basic pass
Ⅰ	林木高径比分布 Height/diameter ratio distribution	正Positive	≤1	较多为负 Most are negative	基本≤1 Basic ≤ 1	正态分布曲线 Normal distribution curve	通过 Pass
Ⅰ	直径分布 Diameter distribution	正Positive	≤1	基本为负 Basically negative	≤1	近似正态分布的曲线Curve with approximate normal distribution	通过 Pass
Ⅱ	林木高径比分布 Height/diameter ratio distribution	正Positive	≤1	基本为正 Basically positive	≤1	正态分布曲线 Normal distribution curve	通过 Pass
Ⅱ	直径分布 Diameter distribution	正Positive	较多>1 More>1	基本为正 Basically positive	较多>1 More>1	近似正态分布的曲线Curve with approximate normal distribution	通过 Pass
Ⅲ	林木高径比分布 Height/diameter ratio distribution	正Positive	≤1	基本为正 Basically positive	基本≤1 Basic ≤ 1	正态分布曲线 Normal distribution curve	通过 Pass
Ⅲ	直径分布 Diameter distribution	正Positive	>1	正 Positive	基本>1 Basic > 1	反J形曲线 Inverse J-shaped curve	通过 Pass

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Distribution Law of Tree Height-to-Diameter Ratio in Each Stratum of Typical Natural Broad-Leaved Forest in Mid-Subtropical Zone

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