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Frontiers of Forestry in China

ISSN 1673-3517

ISSN 1673-3630(Online)

CN 11-5728/S

Front Fore Chin    2009, Vol. 4 Issue (2) : 146-152    https://doi.org/10.1007/s11461-009-0009-3
RESEARCH ARTICLE
Relationship between species diversity and biomass of eucalyptus plantation in Guangxi, south China
Yuanguang WEN1,2(), Fang CHEN2, Shirong LIU3, Hongwen LIANG1, Chang'an YUAN4, Hongguang ZHU1
1. Forestry College, Guangxi University, Nanning 530005, China; 2. College of Life Science, Sichuan University, Chengdu 610064, China; 3. Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China; 4. Guangxi Normal University, Nanning 530001, China
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Abstract

To reveal the relationship between species diversity and biomass in a eucalyptus (Eucalyptus urophylla × E. grandis) plantation located in the Dongmen State Forestry Farm of Guangxi, south China, 18 sample plots were established and the total biomass, arbor layer biomass and undergrowth biomass of communities were subsequently harvested. The results were as follows: 1) Species richness in eucalypt plantation had remarkable positive correlation with biomass of arbor layer, undergrowth and community (α=0.001), its correlation coefficients were 0.6935, 0.7028 and 0.7106 respectively. 2) Leaf area index (LAI) had remarkable positive correlation with species richness and undergrowth biomass (α=0.001). Its correlation coefficients were 0.7310 and 0.6856, respectively. 3) Arbor layer biomass had remarkable correlation with soil organic matter and hydrolysable N, its correlation coefficients was 0.6416 and 0.6203 respectively. Species richness had remarkable correlation with soil organic matter and correlation coefficient was 0.6359. Among them, the correlation was significant at the 0.1 level. Undergrowth biomass had little correlation with nine soil nutrients and correlation coefficients were under 0.4. To sum up, species diversity was advantageous to the promotion of the biomass of the eucalyptus plantation, and the variation of LAI and soil nutrient in small-scales could result in the difference of species diversity and biomass in different sample plots.

Keywords eucalyptus plantations      species diversity      biomass      soil nutrient      leaf area index     
Corresponding Author(s): WEN Yuanguang,Email:wenyg@263.net   
Issue Date: 05 June 2009
 Cite this article:   
Yuanguang WEN,Fang CHEN,Shirong LIU, et al. Relationship between species diversity and biomass of eucalyptus plantation in Guangxi, south China[J]. Front Fore Chin, 2009, 4(2): 146-152.
 URL:  
https://academic.hep.com.cn/ffc/EN/10.1007/s11461-009-0009-3
https://academic.hep.com.cn/ffc/EN/Y2009/V4/I2/146
plotsplanting timeelevation/mslope aspectgradient/°soil density/(g·cm-3)organicmatter/(g·kg-1)canopy densityLAI/(m2·m–2)
11998-0490northeast 27°91.17±010819.2±52.70.481.48±0.31
21998-0491northeast 36°81.10±0.0918.3±50.70.552.58±0.32
31998-0492northeast 38°81.16±0.1121.2±60.50.512.15±0.21
Tab.1  Survey of sample plots
age/yearcompartmentallometric equationscorrelation coefficientF value
7.3stemW=0.012569×(D2H)1.033850.99761420.75
barkW=0.003495×(D2H)0.906120.9902351.08
branchW=0.000265×(D2H)1.207550.962086.94
foliageW=0.000143×(D2H)1.157100.9852230.66
rootW=0.006238×(D2H)0.916330.9933519.96
totalW=0.020259×(D2H)1.017700.99801702.10
Tab.2  Allometric equations of eucalyptus biomass ( in kg, DBH in cm and in m)
number of sub-plotsnumber of individualsspecies richnessShannon-Wiener index
1172192.3195
2127182.5022
393142.2136
4111172.2344
590162.4059
699162.2456
7208232.3117
8221272.4587
9170262.6248
10191262.1696
11231282.0196
12189242.1864
13178212.2376
14182202.0627
15185202.4687
16235232.4227
17220242.5051
18163182.1982
Tab.3  Species diversity in each sub-plot
number of sub-plotsnumber of treesmean DBH/cmmean height/mbiomass/(t·hm-2)
arbor layerundergrowthtotal
11412.5420.45121.9382.576124.514
21410.5317.3976.4772.52479.001
31410.2916.1782.2942.59284.887
41313.9817.31127.6612.39130.051
51411.91614790.0031.48191.484
61311.9415.3981.0071.75882.765
71512.0918.77117.1883.938121.126
81512.3418.35117.6532.455120.108
91613.2919.07141.9273.869145.796
101611.9619.73118.7275.634124.361
111712.2919.39129.5435.087134.63
121612.4318.09128.1133.217131.33
131411.818.1996.8132.5599.362
141411.6317.1891.9482.89794.846
151512.9918.01125.9312.566128.497
161512.5518.8121.4143.228124.642
171511.9718.41106.5973.145109.742
181511.8417.95101.4033.501104.904
mean14.7212.1318.06109.8133.078112.891
SD1.040.831.2718.961.01919.492
CV/%7.096.887.0517.2733.117.27
Tab.4  Biomass of communities in sub-plots
Fig.1  Relation between species richness and arbor layer biomass(a) and total biomass (b) and undergrowth vegetation biomass (c)
Fig.2  Relation between LAI and species diversity(a) and undergrowth vegetation biomass (b)
number of sub-plotsorganic matter/(g·kg-1)total N/(g·kg-1)hydrolysable N/(mg·kg-1)total P/(g·kg-1)available P/(mg·kg-1)total K/(g·kg-1)available K/(mg·kg-1)exchangeable Ca/(mg·kg-1)exchangeable Mg/(mg·kg-1)
119.480.738104.500.45250.3452.980532.70
314.800.70086.250.50000.2602.720020.70
517.940.780103.150.50000.1902.480037.50
717.760.694110.550.53950.3852.516525.10
920.090.746103.750.46950.2303.012530.65
1122.330.730107.350.49000.5502.650032.75
1317.130.740101.950.51000.1802.760024.40
1523.070.754104.600.51650.9652.526519.75
1723.240.85292.000.56950.7302.348527.80
Tab.5  Soil nutrient content of sub-plots
itemorganic mattertotal Nhydrolysable Ntotal Pavailable Ptotal Kavailable Kexchangeable Caexchangeable Mg
AB0.6416*-0.05250.6203*-0.30160.34880.37020.47880.18380.5523
UB0.3680-0.24870.3420.01350.18750.11840.0253-0.12030.2269
S0.6359*0.15090.47210.10440.27170.05250.19670.23820.5562
Tab.6  Correlation coefficients among species richness, biomass and soil nutrients content
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