The Influence of Forest-layer on the Individual Growth of Main Species in the Broad-leaved Secondary Forest in Southern Jiangxi

doi:10.13466/j.cnki.lyzygl.2020.04.005

Abstract

Abstract:

Broad-leaved secondary forest is one of the important forest types in the south of Jiangxi Province,and its quality affects forest functions.This study took the broad-leaved secondary forest in southern Jiangxi as the research object,selected two types of broad-leaved secondary forests after multi-function forest management,and studied the response rule of the average annual growth rate of the dominant tree species in different forest layers to different management modes.The main conclusions are as follows:(1) after three years of operation,the average basal ares growth of the operational and comparative lands did not grow significantly,Pr(>F)=0.188;(2) forest layer is an important index that affects the growth of broadleaved secondary forests.In the main forest layer,the average annual growth of the basal area was the highest,followed by the middle forest layer,and the under forest layer was generally lower.(3) The cumulative basal area of dominant tree species such as Castanopsis carlesii,C.chinensis,Schima superba,C.fargesii and so on is large,and its growth is obviously higher than other tree species.This study can provide the basis and reference for improving the forest quality of broad-leaved secondary forest.

Key words: multi-functional forest management, broad-leaved secondary forests, forest story, basal area growth

CLC Number:

S758.5

LIU Hongsheng, ZANG Hao, HUANG Jincheng, LI Qi, OUYANG Xunzhi, WEI Chunhua, NING Jinkui. The Influence of Forest-layer on the Individual Growth of Main Species in the Broad-leaved Secondary Forest in Southern Jiangxi[J]. FOREST RESOURCES WANAGEMENT, 2020, (4): 28-33.

Figures/Tables 6

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样地编号	面积/ m²	土壤厚度/ cm	坡度/ (°)	林分平均胸径/ cm	林分平均高/ m	林分密度/ (株/hm²)	物种丰富度	优势树种
Plot_1	400	100	<5	18.9	18.2	1200	11	米槠、丝栗栲
Plot_2	400	100	<5	17.6	16.6	950	9	米槠
Plot_3	400	100	<5	16.3	17.2	1250	7	米槠
Plot_4	400	100	<5	15.6	14.8	1300	14	米锥、木荷
Plot_5	400	100	<5	19.9	15.5	1000	12	米锥
Plot_6	600	70	38	16.4	18.5	1183	20	丝栗栲
Plot_7	600	70	32	21.5	20.5	467	8	鹿角栲、南酸枣
Plot_8	600	70	35	22.5	21.6	617	15	青冈、罗浮栲
Plot_9	666.67	70	32	19.4	19.6	780	15	青冈、南酸枣
Plot_10	666.67	70	32	19.9	19.5	1215	20	丝栗栲、杜英

样地编号	作业类型	主要技术要点	主要措施
Plot_1	silvi1	伐除干扰树,补植,割灌	伐除干扰树2棵,补木荷、闽楠
Plot_2	silvi1	伐除干扰树,补植,割灌	伐除干扰树3棵,补木荷、闽楠
Plot_3	silvi1	伐除干扰树,补植,割灌	伐除干扰树2棵,补木荷、闽楠
Plot_4	unsilvi1	无	—
Plot_5	unsilvi1	无	—
Plot_6	silvi2	伐除干扰树,补植,割灌	伐除干扰树2棵,补木荷、闽楠
Plot_7	silvi2	伐除干扰树,补植,割灌	伐除干扰树3棵,补木荷、闽楠
Plot_8	silvi2	伐除干扰树,补植,割灌	伐除干扰树3棵,补木荷、闽楠
Plot_9	unsilvi2	无	—
Plot_10	unsilvi2	无	—

林层	株数/株	所占比例/%
主林层	219	44.15
次林层	125	25.20
林下层	152	30.65
合计	496	100.00

Ⅰ.仅考虑作业类型	自由度	平方和	均方	F值	p值
作业类型	3	1.37E-05	4.579E-06	1.602	0.188
残差	492	10.407E-03	2.859E-06
Ⅱ.考虑林层与作业类型双因素
作业类型	3	1.37E-05	4.579E-06	2.283	0.078
林层	2	3.556E-04	1.778E-04	88.619	2E-16^***
作业类型*林层	6	7.99E-05	1.332E-05	6.638	9.25E-07^***
残差	484	9.71E-04	2.010E-06

树种	株数/ 株	所占比例/ %	单株胸高断面积/ (m²/hm²)	每公顷胸高断面积/ (m²/hm²)	胸高断面积年均生长量/ (m²/hm²)	胸高断面积比例/ %
木荷	67	13.51	0.042	2.831	0.122	10.26
杉木	56	11.29	0.019	1.089	0.022	3.95
米槠	54	10.89	0.099	5.353	0.156	18.89
南酸枣	40	8.06	0.051	2.038	0.096	7.39
拟赤杨	38	7.66	0.040	1.529	0.042	5.54
丝栗栲	33	6.65	0.071	2.349	0.078	8.51
米锥	31	6.25	0.098	3.033	0.127	10.99
杜英	27	5.44	0.046	1.248	0.028	4.52
柃叶连蕊茶^&^*	20	4.03	0.018	0.354	0.011	1.25
青冈	12	2.42	0.199	2.390	0.057	8.66
鸦头梨^**	12	2.42	0.033	0.396	0.007	1.43
刨花楠^*	11	2.22	0.007	0.081	0.003	0.29
鹿角栲	10	2.02	0.107	1.066	0.062	3.86
冬青	10	2.02	0.040	0.401	0.022	1.45
黄樟	9	1.81	0.063	0.564	0.008	2.04
厚皮香^*	8	1.61	0.016	0.124	0.005	0.45
观光木	4	0.81	0.113	0.453	0.029	1.64
野茉莉	4	0.81	0.065	0.258	0.003	0.94
肉桂	4	0.81	0.030	0.118	0.003	0.43
钩栲^*	4	0.81	0.020	0.080	0.006	0.29