基于分层的34a生人促木荷林树种组成与多样性

doi:10.13466/j.cnki.lyzygl.2019.03.016

摘要/Abstract

摘要：

34a生人促木荷林乔木层层次结构分化明显,应用最大受光面(MLRP)法可将乔木层明显划分为2个亚层,第Ⅰ亚层树高≥16.5 m。乔木层共有33种树种,木荷重要值最大,达28.68%,是典型的木荷群落;第Ⅰ亚层有8种树种,木荷占绝对优势,重要值达49.77%;第Ⅱ亚层有30种树种。乔木层物种丰富度S、多样性指数SW、均匀度E和生态优势度ED分别为33,4.37,0.87和0.08,其中第Ⅰ亚层分别为8,2.40,0.48,0.26;第Ⅱ亚层分别为30,4.41,0.88,0.06。全林平均胸径14.2 cm,平均树高18.4 m,株数密度1 875株/hm²,单位面积蓄积量262.9 m³/hm²。第Ⅰ亚层和第Ⅱ亚层的平均胸径分别为23.9 cm和9.6 cm,平均树高分别为21.9 m和12.1 m。第Ⅰ亚层和第Ⅱ亚层的株数密度分布占全林的23.0%和77.0%,单位面积蓄积量分布占全林的75.2%和24.8%。

关键词: 人工促进天然更新, 木荷林, 树种组成, 物种多样性, 最大受光面法

Abstract:

The tree stratum of 34- year-old Schima superba forest by AMPR(Artificial Measures Promoting Regeneration) 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 16.5 m.It was typical S.superba community which was composed by 33 tree species and the important value of S.superba(the dominant tree species) was 26.68%.There were 8 and 30 tree species in sub-stratum I and sub-stratum II respectively.The important value of S.superba(the absolutely dominant tree species) in sub-stratum I was 49.77%.Its species richness(R),Shannon-Wiener index(SW),evenness(E) and ecological dominance(ED) in tree stratum were 33,4.37,0.87 and 0.08 respectively.Which in sub-stratum I were 8,2.40,0.48 and 0.26 respectively and in sub-stratum II were 30,4.41,0.88 and 0.06 respectively.Its average stand DBH,height,density and growing stock in tree stratum were 14.2 cm,18.4 m,1 875 N/hm² and 262.9 m³/hm² respectively.Its average stand DBH in sub-stratum I and sub-stratum II were 23.9 cm and 9.6 cm respectively.Its average stand height in sub-stratum I and sub-stratum II were 21.9 m and 12.1 m respectively.Its percentage of stand density in sub-stratum I and sub-stratum II were 23.0% and 77.0% respectively.Its percentage of growing stock in sub-stratum I and sub-stratum II were 75.2% and 24.8% respectively.

Key words: Artificial Measures Promoting Regeneration(AMPR), Schima superba forest, tree species composition, species diversity, Maximum Light Receiving Plane(MLRP) method

中图分类号:

S718.54

李志明. 基于分层的34a生人促木荷林树种组成与多样性[J]. 林业资源管理, 2019,(3): 94-98.

LI Zhiming. Tree Species Composition and Diversity of 34 Year-old Schima superba Forest by AMPR Based on Stratification[J]. FOREST RESOURCES WANAGEMENT, 2019,(3): 94-98.

图/表 4

表1

34a生人促木荷林各亚层树种重要值

林层	序号	树种	相对多度	相对频度	相对优势度	重要值
乔木层	1	木荷Schima superba	20.54	9.86	49.65	26.68
	2	东南野桐Mallotus lianus	7.14	5.63	7.98	6.92
	3	蚊母树Distylium myricoides	9.82	5.63	3.65	6.37
	4	南酸枣Choerospondias axillaris	3.57	4.23	8.73	5.51
	5	杉木Cunninghamia lanceolata	5.36	5.63	4.88	5.29
	6	薄叶山矾Symplocaceae anomala	4.46	5.63	1.92	4.01
	7	山矾Symplocos sumuntia	3.57	5.63	0.80	3.33
	8	石笔木Tutcheria champion	5.36	2.82	1.70	3.29
	9	野含笑Michelia skinneriana	4.46	4.23	0.96	3.22
	10	杜英Elaeocarpus decipiens	2.68	4.23	2.42	3.11
	11	浙江桂Cinnamomum chekiangense	2.68	2.82	3.27	2.92
	12	少叶黄杞Engelhardtia fenzelii	2.68	2.82	2.85	2.78
		其他21种树种	27.68	40.84	11.19	26.58
第Ⅰ亚层
	1	木荷Schima superba	44.00	41.18	64.14	49.77
	2	南酸枣Choerospondias axillaris	16.00	17.65	12.91	15.52
	3	东南野桐Mallotus lianus	16.00	11.76	10.45	12.74
	4	浙江桂Cinnamomum chekiangense	8.00	5.88	4.25	6.04
	5	杉木Cunninghamia lanceolata	4.00	5.88	3.64	4.51
	6	中华杜英Elaeocarpus chinensis	4.00	5.88	2.16	4.01
	7	杜英Elaeocarpus decipiens	4.00	5.88	1.67	3.85
	8	蓝果树Nyssa sinensis	4.00	5.88	0.77	3.55
第Ⅱ亚层
	1	木荷Schima superba	13.79	8.33	19.43	13.85
	2	蚊母树Distylium myricoides	12.64	6.67	11.25	10.19
	3	杉木Cunninghamia lanceolata	5.75	6.67	7.46	6.63
	4	薄叶山矾Symplocaceae anomala	5.75	6.67	5.91	6.11
	5	少叶黄杞Engelhardtia fenzelii	3.45	3.33	8.81	5.20
	6	石笔木Tutcheria champion	6.90	3.33	5.25	5.16
	7	山矾Symplocos sumuntia	4.60	6.67	2.46	4.57
	8	野含笑Michelia skinneriana	5.75	5.00	2.97	4.57
	9	福建山矾Symplocos fukienensis	3.45	5.00	2.84	3.76
	10	光叶山矾Symplocaceae lancifolia	3.45	5.00	3.16	3.87
	11	东南野桐Mallotus lianus	4.60	3.33	2.81	3.58
	12	杜英Elaeocarpus decipiens	2.30	3.33	3.98	3.20
		其他18种树种	27.57	36.67	23.67	29.31

表1

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表4

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