A1256655905JTxti

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The Estimation of Carbon Sequestration of four
main tree species in China
Wu Yongbo
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How to do?
Collection biomass regression model of different
sites Measure the biomass with different
models Measure the C sequestration according to
CHO?0.5C
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What have been done about biomass?
Under different plantation density Under
different sites, include soil properties, slope
Under different management level
But Lack of long period continuous
measurement Little about underground. biomass
parts which are also important
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1.??(Populus deltoides)
(1) The choose of different regression model
speices area Regression model
??????? Xizang W0.231874D2.287768(Guan,1993) W0.0705206(D2H)0.9381716
??? Henan lgW0.96587lgD2H-1.37847(Zhao,1988)
??? Henan lgW1.0011lgD2H-1.62289
??? Shandong lgW-1.11420.8964lgD2H lgW-1.36502.8420lgD(Xu,1987)
I-69? Jiangsu(4a) 42.7367.588kg per stem(Sun,1995)
NL-80351 Jiangsu(4a) 43.68270.574kg per stem
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(2)The estimated C sequestration of investigated
Poplar
part Regression equation
leaf lgW0.4489lg(D2H)-1.1455
branch lgW0.9911lg(D2H)-2.3791
stem lgW1.06591lg(D2H)-2.1305
root lgW0.7061lg(D2H)-1.2588
10???I-69??????????74.18.3t/hm2,???????????
???????????(??45t/hm2??,?????30t/hm2,????50t/hm2)?
???????11.11.7t/hm2a?(???,2003)
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2. ??(Cunninghamia lanceolata)
(1)Choose of estimation model
Area Regression equation
Fujian W1.1482D3.3671H2.1878 (Lin,1993)
Liao W0.007673D0.04111H2.0536 (Zhu,1997)
Jiangxi W1.168650.2375D2 (Hui,1988)
Jiangsu W0.0240(D2H)0.9820
Zhejiang W0.2236(D2H)0.6912(Lin,1991)
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(2)The estimated C sequestration of investigated
Chinese fir
12-year-old D12.56cm,H10.38m 25-year-old D19
.34cm H19.04m.
area 12a(kg per stem) 25a(kg per stem)
?? 38.635 90.002
?? 34.40 145.695
?? 37.249 102.89

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2.???(Pinus massoniana)
(1)Choose of estimation model
area Regression equation
Fujian W1.0715D1.3633H0.1511(Lin,1993)
Zhejiang lgW0.9797lgD2H-1.5794(Chen,1998)
guizhou(8-30a) W0.112(D2H)0.82424(Ding,2001)
guizhou(20a) W0.17747(D2H)0.73928(Ding,2002)
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(2)The estimated C sequestration of investigated
stand
the average D of investigated pine s
19.87cm,H18.29cm,the C sequestration of Pine
84.85kg per stem?
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3.??(Phyllostachys pubescens)
(1)choose of estimation model
area Regression equation
Fujian 2.5735kg per stem(???????)(Lan,2000)
Zhejiang 4.448kg per stem(???)4.864kg per stem(???) (Huang,1993)
Fujian W213.4164D-0.5805H2.3131(Chen,1998)
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(2)The estimated C sequestration of investigated
Mao Bamboo
D11.90cm H16.60cm C11.25kg per stem
area Gloss C(106t) area Gloss C(106t)
?? 0.87 ?? 10.77
?? 45.65 ?? 8.97
?? 1.445 ?? 0.06
?? 0.095 ?? 1.06
?? 0.48 ?? 7.025
?? 3.565 ?? 2.065
?? 7.55 ?? 2.99
The C estimation value in China92.51106t.(Fang
,1996)
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4.The biomass estimation of evergreen
broadleaved tree species
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area Regression equation
??Cyclobalanopsis glauca ??????? W-0.58154D2.13469(Du,1987)
??Castanopsiseyrei ??????? W-0.77107D2.15336
??Schima superba ??????? W-1.04046D2.44866
??Lithocarpus glaber ??????? W-0.74957D2.23288
?? ?? W-55.739714.7559D lgW0.26990.5382lg(D2H)(Chen,1989)
????? ?? ??152.83t/hm2(?????2333?)(Shen,1996)
????? ????? 213.6tC/hm2(10a)109.85 tC/hm2(8a) 89.75tC/hm2(3a)(tang,2003)

????????????????????????????
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4.The factors to affect the C sequestration

• Pure forest and mixed forest

age (a) stand(tC/hm2) tree(tC/hm2)
Masson Pine pure forest 32 30.02 25.56
Pasania glabraMasson pine 25 89.73 72.49
Chinese fir mixed forest 27 102.066 97.743
Chinese firTsoongiodendron Chun 27 130.045 99.2
Chinese firTsoongiodendron Chun 27 130.045 26.543
C sequestration of mixed forest is higher than
that of pure forest
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• density

site Hunan Hunan Hunan Hunan Dagangshan of Jiangxi province Dagangshan of Jiangxi province Dagangshan of Jiangxi province Dagangshan of Jiangxi province Dagangshan of Jiangxi province
age 7 7 7 7 12 12 12 12 12
density (stem/hm2) 3000 3600 4500 7500 1530 1845 2115 2407 2955
tC/hm2) 44.2 53.7 62.0 76.2 89.87 99.67 102.79 108.88 119.98
With the increasing of density, the C
sequestration increased, but when the density
was too high, the ratio of those of low diameter
was high, and the stem parts were low.
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• Site condition

The sequestrated Carbon of Chinese Fir in
different age and site index
Age groups ? ? ? ? ? ? ? ? ?
Site index 17 14 9 16 11 9 17 13 8
tC/hm2 30.68 28.69 13.34 56.96 46.95 30.78 79.9 59.83 37.46
With sites index increasing, the C
sequestration increased.
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The sequestrated Carbon of Masson Pine in
different age and site index
age (a) Site index tC/hm2 kgC per stem
22 12 65.93 25.4
22 16 108.8 55.24
22 19 125.87 94.1
30 12 86.87 50.7
30 16 116.94 73.8
????????????????????????????????
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??????????????????(Tg)
?? ??? ??? ??? ??? ??? ??
??? 42.12 67.14 18.85 7.86 2.61 138.58
?? 9.98 31.61 11.73 7.5 2.87 63.69
?? 14.9 34.2 14.6 24.23 13.03 100.96
?? 163.53 281.72 108.82 180.72 101.15 835.94
(???,2001)
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Thank you for your attention!