Analysis on the Changing Tendency of Carbon Sequestration and Carbon Density of Natural Forests in Yunnan Province

doi:10.13466/j.cnki.lyzygl.2022.04.007

Abstract

Abstract:

Based on the forest resources inventory data of eight times (1977-2018),the biomass expansion factor was used to analyze the carbon sequestration and carbon density of natural forests in Yunnan Province.The results showed that:1)The carbon sequestration of natural forests in Yunnan Province increased from 450.886 million tons in the second inventory to 810.151 million tons in the ninth inventory,with a net increase of 359.265 million tons and an annual growth rate of 1.64%;2)The carbon density of natural forest showed a "rising-falling-rising"trend,carbon density tested in the ninth inventory was 55.79t/hm²;3)In the seventh to ninth inventory,the total amount and increment of carbon sequestration in middle-age forest were the highest,and the order of carbon density in natural forest in the third inventory was overmature forest>mature forest>near mature forest>middle-age forest>young forest,the order of carbon sequestration of different forest species was shelterbelt forest>timber forest>special forest>fuel forest,and the order of carbon density was special forest>shelterbelt forest>timber forest>fuel forest;4)Among the different dominant tree species,Quercus,broadleaves mixed forest,Pinus yunnanensis,mixed coniferous and deciduous forests,other soft wood and Abies fabri were the main contributors to the carbon sequestration of natural forests in Yunnan Province,the order of carbon sequestration increment of different dominant tree species was:broadleaves mixed forest>mixed coniferous and deciduous forests>Pinus yunnanensis>mixed coniferous>Abies fabri,and the estimated carbon density of Tsuga chinensis, Abies fabri,Picea asperata was quite high,with sound growth quality.

Key words: natural forest, carbon sequestration, carbon density, dynamic analysis, Yunnan Province

CLC Number:

S718.5

HU Zhongyu, SU Jianlan, LONG Qin, LI Maomei. Analysis on the Changing Tendency of Carbon Sequestration and Carbon Density of Natural Forests in Yunnan Province[J]. FOREST RESOURCES WANAGEMENT, 2022, 0(4): 45-53.

Figures/Tables 8

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清查区间	碳储量/万t	碳密度/(t/hm²)
1977—1981	45088.599	57.063
1984—1988	44839.378	60.489
1989—1993	44907.455	54.896
1994—1998	51790.725	47.322
1999—2003	55684.614	44.787
2004—2008	69712.670	52.885
2009—2013	72718.384	54.627
2014—2018	81015.102	55.792

龄组	项目	清查区间
龄组	项目	2004—2008	2009—2013	2014—2018
幼龄林	碳储量/万t	12424.457	12376.620	14871.916
幼龄林	碳储量占比/%	17.82	17.02	18.36
中龄林	碳储量/万t	16146.554	17400.995	21354.199
中龄林	碳储量占比/%	23.16	23.93	26.36
近熟林	碳储量/万t	13297.376	13796.395	15541.081
近熟林	碳储量占比/%	19.07	18.97	19.17
成熟林	碳储量/万t	14138.353	15528.250	15633.430
成熟林	碳储量占比/%	20.28	21.35	19.30
过熟林	碳储量/万t	13705.930	13616.124	13614.476
过熟林	碳储量占比/%	19.67	18.73	16.81

清查区间	幼龄林	中龄林	近熟林	成熟林	过熟林	全省总碳密度
2004—2008	25.088	47.459	62.546	86.653	128.117	52.885
2009—2013	27.118	47.842	60.267	89.634	125.033	54.627
2014—2018	29.542	51.445	63.495	85.959	127.274	55.792

清查区间	林种	碳储量
2004—2008	防护林	28122.536
	特用林	14760.848
	用材林	25969.149
	薪炭林	860.137
2009—2013	防护林	31382.327
	特用林	15431.376
	用材林	24754.576
	薪炭林	1150.105
2014—2018	防护林	34338.134
	特用林	16421.770
	用材林	29141.850
	薪炭林	1113.348

清查区间	项目	防护林	特用林	用材林	薪炭林	全省总况
2004—2008	林种面积/万hm²	562.920	152.110	568.130	35.040	1318.200
2004—2008	碳密度/(t/hm²)	49.958	97.041	45.710	24.547	52.885
2009—2013	林种面积/万hm²	592.240	168.900	530.220	39.820	1331.180
2009—2013	碳密度/(t/hm²)	52.989	91.364	46.687	28.883	54.627
2014—2018	林种面积/万hm²	624.390	186.650	600.270	40.790	1452.100
2014—2018	碳密度/(t/hm²)	54.995	87.982	48.548	27.295	55.792