Tg C a -1 1 Tg = g Tg C a -1.

Transcription

1 Chinese Journal of Applied Ecology Oct * 1 2 1** Tg C a -1 1 Tg = g 4 34 Tg C a ± ± ± ± ± ±0 29 Tg C a X24 A Carbon sequestration potential of forest vegetation in Jiangxi and Zhejiang provinces based on national forest inventory NIE Hao 1 2 WANG Shao-qiang 1 ZHOU Lei 1 2 WANG Jingyuan 1 ZHANG You 1 DENG Ze-wen 1 YANG Feng-ting 1 1 Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China 2 Graduate University of Chinese Academy of Sciences Beijing China -Chin J Appl Ecol Abstract Based on the sixth national forest inventory and the investigation data of 1030 forest sampling plots in subtropical China collected from publications and by using stand growth empirical equation this paper estimated the carbon sequestration potential of forest vegetation under natural growth in Jiangxi and Zhejiang provinces in In the meanwhile the effects of three forest management measures including interplanting selective thinning and fertilization on the future forest carbon sequestration were explored by using the survey data of 455 sampling plots In the mean annual carbon sequestration potential of forest vegetation under natural growth in Jiangxi and Zhejiang could reach and 4 34 Tg C a -1 1 Tg = g respectively Interplanting could generate the largest carbon sequestration potential of forest vegetation followed by selective thinning and fertilization resulting in an increase in the potential by 6 54± ±2 02 and 2 35±0 6 Tg C a -1 in Jiangxi and by 2 64±1 28 Tg C a ±0 69 and 1 15±0 29 Tg C a -1 in Zhejiang respectively Key words forest carbon sequestration potential carbon sequestration natural carbon sequestration forest management measure CO 2 * KZCX2-YW DFA CB ** sqwang@ igsnrr ac cn CO ml L -1 35% 1 CO 2 UNFCCC

2 mm ±100 Pg 1 Pg = g % 54% 88% 1 CO 2 84% B = av+b 1 B Mg hm -2 V m 3 hm -2 a b m 3 hm m 3 hm -2 85% Richards Table 1 Distribution of forest in Jiangxi and Zhejiang Province Forestry land Forest cover Area of middlejuvenile forest Area rate of μ10 4 hm 2 rate % μ10 4 hm 2 middle-juvenile forest % Table 2 Relationship between volume and biomass of different tree species 07' 29 09' N ' ' E 16 4 ~ R 2 n 1340 ~ 1930 mm 27 06' 31 A 11' N ' ' E Jiangxi Zhejiang Species Volume-biomass equation A B = V B B = V C B = V D B = V Pinus massoniana B Cunninghamia lanceolata C Broadleaf forest D Pinus elliottii The same below

3 y = a 1 - be -cx 1 1 -d 2 CC 575 i i VOC Mm m VOC nmm m Age 3 m Error = t SD i / 槡 ni 7 1 t 95% n i 4 t SD i i n i i Cryptomeria fortunci A 20 m A m = 1 S m 5 n = 1 S n A n 3 S m m S n A n m n n = m A m S% = B i B m 4 CC i = VOC Mm - VOC nmm Age m α = 0 05 S% B i B m Pot = Richards A m + t - Richards A m Excel 2003 SPSS 16 0 one-way ANOVA 575 S m % Ca /t 5 1 Pot Richards 0 ~ 25 m A m m 25 t S m % 35 Ca m m 0 ~ %

4 Fig 1 Forest growth curve of different tree species A Pinus massoniana B Cunninghamia lanceolata C Broadleaf forest D Pinus elliottii The same below % 60 0% 51 5% 21 0% 22 3 Table 3 Carbon sequestration potential of main tree species under natural growth Province 19 Species Average age a Density % Carbon content % A Jiangxi B C D A Zhejiang B C Carbon sequestration potential t C hm -2 a ±0 39 t C hm -2 a % 177 1% 0 59 ± 0 28 t C hm -2 a % 4 3 4

5 Table 4 Effect of forest management on carbon sequestration ability of main species Forest management P t 0 05 Species Samples n Carbon sequestration capacity t C hm -2 a -1 A ±0 28 < Interplanting B ±0 39 < C ±0 51 < D ±2 01 < A Selective B ±0 57 < thinning D ±0 65 < A ±0 08 < Fertilization B ±0 12 < D ±0 11 < a b Fig 2 Comparison of carbon sequestration potential in Jiangxi a and Zhejiang provinces b in hm % 86 5% % % 85 7% 60 3% 44 2% 7 49 ± 3 1 Tg C a ± Tg C a ±1 65 Tg C a ±0 34 Tg C a ±0 91 Tg C 2 a Tg C a ±1 27 Tg C a % 5 Table 5 Carbon sequestration potential of forest vegetation in Jiangxi and Zhejiang Province Species Area 10 4 hm 2 Natural carbon sequestration potential Interplanting Carbon sequestration capacity Selective thinning Fertilization A ± ±0 20 Jiangxi B ± ± ±0 35 C ± D ± ± ±0 06 Sum ± ± ±0 61 E ± Zhejiang F ± A ± ±0 13 G ± B ± ± ±0 14 H ± ± C ± Sum ± ± ±0 29

6 ECupressus funebris F Pinus thunbergii G Pinus densata H Cryptomeria fortunei 6 Table 6 Natural carbon sequestration of forest vegetation in different periods Region Period Forest area 10 6 hm 2 Carbon sequestration Total carbon per unit area sequestration t C hm -2 a -1 Reference China ± ± ~ ± ± ~ ± ± ~ Jiangxi Zhejiang FAO ~ 0 26 t C hm -2 a ~ 0 96 t C hm -2 a -1 6 CO 29 2 Nabuurs ~ 0 6 t C hm -2 a ~ 0 37 t C hm -2 a -1 CO Tg C a Tg C a % 5 9% ~ 8 9%

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