Analysis on Characteristics of 19 year-old Semi-Natural Forest of Cunninghamia lanceolata and Broad-Leaved Trees Based on Stratification

doi:10.13466/j.cnki.lyzygl.2020.06.020

Abstract

Abstract:

The tree stratum of 19 year-old semi-natural forest of Cunninghamia lanceolata and broad-leaved trees was stratified obviously to 2 sub-strata (sub-stratum I and sub-stratum II) by MLRP (Maximum Light Receiving Plane) method.The tree height in sub-stratum I was higher than or equal to 13.0 m.Its average stand DBH,height,density and growing stock in tree stratum were 13.7 cm,14.6 m,2 867 N/hm² and 309.7 m³/hm² respectively.Its average stand DBH in sub-stratum I and sub-stratum II were 17.1cm and 10.3 cm respectively.Its average stand height in sub-stratum I and sub-stratum II were 16.4 m and 10.6 m respectively.Its percentage of stand density in sub-stratum I and sub-stratum II were 43.60% and 56.40% respectively.Its percentage of growing stock in sub-stratum I and sub-stratum II were 74.98% and 25.02% respectively.There were 17 tree species in tree stratum and C.lanceolata was the absolutely dominant tree species,with the important value of 61.88%.There were 8 and 17 tree species in sub-stratum I and sub-stratum II respectively.The important value of C.lanceolata (the absolutely dominant tree species) in sub-stratum I and sub-stratum II was 76.20% and 58.31% respectively.Its species richness (R),Shannon-Wiener index (SW),evenness (E) and ecological dominance (ED) in tree stratum were 17,1.46,0.36 and 0.62 respectively,which in sub-stratum I was 8,0.83,0.28 and 0.78 respectively.And the value in sub-stratum II were 17,1.80,0.44 and 0.51 respectively.

Key words: semi-natural forest, Cunninghamia lanceolata, broad-leaved trees, natural regeneration, tree species composition, diversity, maximum light receiving plane method

CLC Number:

LI Zhiming. Analysis on Characteristics of 19 year-old Semi-Natural Forest of Cunninghamia lanceolata and Broad-Leaved Trees Based on Stratification[J]. FOREST RESOURCES WANAGEMENT, 2020, (6): 123-127.

Figures/Tables 4

Tab.1

Important value of tree species in each sub-stratum in 19 year-old semi-natural forest of Cunninghamia lanceolata and broad-leaved trees%

林层	序号	树种	相对多度	相对优势度	相对频度	重要值
乔木层	1	杉木Cunninghamia lanceolata	78.20	80.78	26.67	61.88
	2	木荷Schima superba	6.69	8.51	6.67	7.29
	3	白花龙Styrax faberi	4.07	1.13	13.33	6.18
	4	拟赤杨Alniphyllum fortunei	1.16	1.04	8.89	3.70
	5	椤木石楠Photinia bodinieri	1.74	3.23	4.44	3.14
	6	枫香Liquidambar formosana	1.74	0.84	6.67	3.08
	7	南酸枣Choerospondias axillaris	1.74	2.17	4.44	2.79
	8	多脉榆Ulmus castaneifolia	0.87	1.55	4.44	2.29
	9	合欢Albizia julibrissin	0.87	0.20	4.44	1.84
	10	厚壳树Ehretia thyrsiflora	0.58	0.17	4.44	1.73
	11	蓝果树Nyssa sinensis	0.58	0.09	2.22	0.96
	12	香叶树Lindera communis	0.29	0.07	2.22	0.86
	13	石梓Gmelina chinensis	0.29	0.06	2.22	0.86
	14	盐肤木Rhus chinensis	0.29	0.04	2.22	0.85
	15	野茉莉Styrax japonicus	0.29	0.04	2.22	0.85
	16	黄檀Dalbergia hupeana	0.29	0.04	2.22	0.85
	17	山杜英Elaeocarpus sylvestris	0.29	0.04	2.22	0.85
第Ⅰ亚层	1	杉木Cunninghamia lanceolata	88.00	83.46	57.14	76.20
	2	木荷Schima superba	4.00	6.14	14.29	8.14
	3	椤木石楠Photinia bodinieri	2.67	4.51	4.76	3.98
	4	南酸枣Choerospondias axillaris	2.00	2.57	4.76	3.11
	5	多脉榆Ulmus castaneifolia	1.33	2.19	4.76	2.76
	6	拟赤杨Alniphyllum fortunei	0.67	0.56	4.76	1.99
	7	枫香Liquidambar formosana	0.67	0.51	4.76	1.98
	8	蓝果树Nyssa sinensis	0.67	0.07	4.76	1.83
第Ⅱ亚层	1	杉木Cunninghamia lanceolata	70.62	75.05	29.27	58.31
	2	木荷Schima superba	8.76	13.60	7.32	9.89
	3	白花龙Styrax faberi	7.22	3.54	14.63	8.46
	4	枫香Liquidambar formosana	2.58	1.54	7.32	3.81
	5	拟赤杨Alniphyllum fortunei	1.55	2.07	7.32	3.64
	6	合欢Albizia julibrissin	1.55	0.62	4.88	2.35
	7	厚壳树Ehretia thyrsiflora	1.03	0.53	4.88	2.15
	8	南酸枣Choerospondias axillaris	1.55	1.32	2.44	1.77
	9	椤木石楠Photinia bodinieri	1.03	0.48	2.44	1.32
	10	香叶树Lindera communis	0.52	0.23	2.44	1.06
	11	石梓Gmelina chinensis	0.52	0.20	2.44	1.05
	12	多脉榆Ulmus castaneifolia	0.52	0.18	2.44	1.05
	13	盐肤木Rhus chinensis	0.52	0.13	2.44	1.03
	14	野茉莉Styrax japonicus	0.52	0.13	2.44	1.03
	15	蓝果树Nyssa sinensis	0.52	0.13	2.44	1.03
	16	黄檀Dalbergia hupeana	0.52	0.12	2.44	1.03
	17	山杜英Elaeocarpus sylvestris	0.52	0.12	2.44	1.03

Tab.1

Tab.2

Tab.3

Tab.4

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径阶/cm	6	8	10	12	14	16	18	20	22	24	26
乔木层/(株/hm²)	408	333	417	383	400	308	250	183	117	50	17
杉木/(株/hm²)	217	242	333	333	350	258	233	150	83	84	9
阔叶树/(株/hm²)	192	92	83	50	50	50	17	33	33	17	8

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