Current stocks and potential of carbon sequestration of the forest tree layer in Qinghai Province, China

doi:10.17521/cjpe.2018.0058

Abstract

Abstract:

Aims Our objective was to estimate the carbon storage in the forest tree layer in Qinghai Province, China.
Methods Based on forest resource inventory data and field investigation data, we estimated the carbon storage, sequestration rate and potentials in the forest tree layer in the Qinghai Province.
Important findings The carbon density and total carbon storage of forest tree layer in Qinghai Province was 76.54 Mg·hm ^-2 and 27.38 Tg, respectively, of which four forest types (Picea spp. forest, Cupressus funebris forest, Betula spp. forest and Populus spp. forest) accounted for 86.67% while their areas were 96.23% of total forest areas in Qinghai. The carbon density and carbon storage of Picea spp. forest was 106.93 Mg·hm ^-2 and 14.78 Tg, respectively, which was the largest among all forest types. The carbon storage of the forest tree layer at different stand ages followed the sequence of over-mature forest > middle-aged forest > mature forest > near-mature forest > young forest. In addition, the carbon storage of forest tree layer in the province increased from 23.30 Tg in 2003 to 27.38 Tg in 2011. The average annual growth of carbon and carbon sequestration rate were 0.51 Tg and 1.06 Mg·hm ^-2·a ^-1, respectively. The maximum and minimum of carbon sequestration rate were respectively found in Cupressus funebris forest (0.44 Mg·hm ^-2·a ^-1) and Betula spp. forest (-1.06 Mg·hm ^-2·a ^-1). The mean carbon sequestration potential reached 8.50 Tg in 2011, with the highest value found in Picea spp. forest (3.40 Tg). These findings suggested high carbon sequestration potential of forest tree layer in Qinghai Province. Therefore, the carbon storage in Qinghai Province could be increased through better forest management and utilization.

http://jtp.cnki.net/bilingual/detail/html/ZWSB201808004

Key words: carbon storage, carbon sequestration rate, carbon sequestration potential, arbor, Qinghai Province

CHEN Ke-Yu, ZI Hong-Biao, ADE Luji, HU Lei, WANG Gen-Xu, WANG Chang-Ting. Current stocks and potential of carbon sequestration of the forest tree layer in Qinghai Province, China[J]. Chin J Plant Ecol, 2018, 42(8): 831-840.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2018.0058

https://www.plant-ecology.com/EN/Y2018/V42/I8/831

Figures/Tables 8

References 45

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森林类型 Forest type	器官 Organ	生物量方程 Biomass equation	R²	胸径 Diameter at breast height (cm)
云杉林 Picea forest	干 Stem	W_S = 0.0447(D²H)^0.8564	0.986	1.0-88.0
云杉林 Picea forest	枝 Branch	W_B = 0.0184(D²H)^0.8539	0.988
	叶 Leaf	W_L = 0.012(D²H)^0.8654	0.992
	根 Root	W_R = 0.0084(D²H)^0.9405	0.992
杨树林 Populus forest	干 Stem	W_S = 0.0417(D²H)^0.866	0.992	7.2-21.0
杨树林 Populus forest	枝 Branch	W_B = 0.0095(D²H)^0.8951	0.986
	叶 Leaf	W_L = 0.0035(D²H)^0.8774	0.990
	根 Root	W_R = 0.0289(D²H)^0.786	0.886
针叶混交林 Mixed coniferous forest	干 Stem	W_S = 0.0373(D²H)^0.9758	0.784	3.0-178.5
针叶混交林 Mixed coniferous forest	枝 Branch	W_B = 0.0082(D²H)^1.08419	0.662
	叶 Leaf	W_L = 0.0207(D²H)^0.8481	0.619
	根 Root	W_R = 0.0379(D²H)^0.7321	0.542
阔叶混交林 Mixed broad-leaved forest	干 Stem	W_S = 0.0401(D²H)^0.8514	0.933	1.4-67.5
阔叶混交林 Mixed broad-leaved forest	枝 Branch	W_B = 0.0079(D²H)^1.007	0.901
	叶 Leaf	W_L = 0.0075(D²H)^0.8592	0.846
	根 Root	W_R = 0.0176(D²H)^0.8841	0.917
针阔混交林 Mixed coniferous and broad-leaved forest	干 Stem	W_S = 0.0287(D²H)^0.9953	0.801	1.4-178.5
针阔混交林 Mixed coniferous and broad-leaved forest	枝 Branch	W_B = 0.0067(D²H)^1.0999	0.696
	叶 Leaf	W_L = 0.013(D²H)^0.8888	0.656
	根 Root	W_R = 0.0299(D²H)^0.7547	0.609

森林类型 Forest type	器官 Organ	生物量方程 Biomass equation	R²	胸径 Diameter at breast height (cm)
云杉林 Picea forest	干 Stem	W_S = 0.0447(D²H)^0.8564	0.986	1.0-88.0
云杉林 Picea forest	枝 Branch	W_B = 0.0184(D²H)^0.8539	0.988
	叶 Leaf	W_L = 0.012(D²H)^0.8654	0.992
	根 Root	W_R = 0.0084(D²H)^0.9405	0.992
杨树林 Populus forest	干 Stem	W_S = 0.0417(D²H)^0.866	0.992	7.2-21.0
杨树林 Populus forest	枝 Branch	W_B = 0.0095(D²H)^0.8951	0.986
	叶 Leaf	W_L = 0.0035(D²H)^0.8774	0.990
	根 Root	W_R = 0.0289(D²H)^0.786	0.886
针叶混交林 Mixed coniferous forest	干 Stem	W_S = 0.0373(D²H)^0.9758	0.784	3.0-178.5
针叶混交林 Mixed coniferous forest	枝 Branch	W_B = 0.0082(D²H)^1.08419	0.662
	叶 Leaf	W_L = 0.0207(D²H)^0.8481	0.619
	根 Root	W_R = 0.0379(D²H)^0.7321	0.542
阔叶混交林 Mixed broad-leaved forest	干 Stem	W_S = 0.0401(D²H)^0.8514	0.933	1.4-67.5
阔叶混交林 Mixed broad-leaved forest	枝 Branch	W_B = 0.0079(D²H)^1.007	0.901
	叶 Leaf	W_L = 0.0075(D²H)^0.8592	0.846
	根 Root	W_R = 0.0176(D²H)^0.8841	0.917
针阔混交林 Mixed coniferous and broad-leaved forest	干 Stem	W_S = 0.0287(D²H)^0.9953	0.801	1.4-178.5
针阔混交林 Mixed coniferous and broad-leaved forest	枝 Branch	W_B = 0.0067(D²H)^1.0999	0.696
	叶 Leaf	W_L = 0.013(D²H)^0.8888	0.656
	根 Root	W_R = 0.0299(D²H)^0.7547	0.609

林型 Forest type	幼龄林 Young forest	中龄林 Middle-aged forest	近熟林 Near-mature forest	成熟林 Mature forest	过熟林 Over-mature forest
云杉林 Picea forest	≤60	61-100	101-120	121-160	≥161
柏木林 Cupressus funebris forest	≤60	6-100	101-120	121-160	≥161
桦木林 Betula forest	≤30	31-50	51-60	61-80	≥81
杨树林 Populus forest	≤10	11-15	16-20	21-30	≥31

林型 Forest type	幼龄林 Young forest	中龄林 Middle-aged forest	近熟林 Near-mature forest	成熟林 Mature forest	过熟林 Over-mature forest
云杉林 Picea forest	≤60	61-100	101-120	121-160	≥161
柏木林 Cupressus funebris forest	≤60	6-100	101-120	121-160	≥161
桦木林 Betula forest	≤30	31-50	51-60	61-80	≥81
杨树林 Populus forest	≤10	11-15	16-20	21-30	≥31

林型 Forest type	平均碳密度 Carbon density (Mg·hm^-2)	面积 Area (×10⁴hm²)	碳储量 Carbon storage (Tg)
云杉林 Picea forest	106.93	10.38	14.78
柏木林 Cupressus funebris forest	38.31	13.83	5.29
桦树林 Betula forest	43.55	6.06	2.63
杨树林 Populus forest	34.76	4.16	0.40