Mechanisms and methods for augmenting carbon sink in forestry

doi:10.12302/j.issn.1000-2006.202209008

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (6): 167-176.doi: 10.12302/j.issn.1000-2006.202209008

Special Issue: 南京林业大学120周年校庆特刊

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Mechanisms and methods for augmenting carbon sink in forestry

ZOU Xiaoming¹^,²^,^*(), WANG Guobing¹^,³, GE Zhiwei¹^,³, XIE Youchao⁴, RUAN Honghua¹^,^*(), WU Xiaoqiao⁴, YANG Yan⁴

1. College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
2. Department of Environmental Science, University of Puerto Rico, San Juan PR 00936, USA
2. Department of Environmental Science, University of Puerto Rico, San Juan PR 00936, USA
3. Center for Carbon Balancing, Academy of Chinese Ecological Progress and Forestry Development Studies,Nanjing Forestry University, Nanjing 210037, China
4. Forestry Bureau of Jiangsu Province, Nanjing 210036, China

Received:2022-09-04 Revised:2022-10-13 Online:2022-11-30 Published:2022-11-24
Contact: ZOU Xiaoming,RUAN Honghua E-mail:xzou2011@gmail.com;hhruan@njfu.edu.cn

Abstract

Abstract:

Rising atmospheric CO₂ concentration is recognized as the major driver for global climate warming. Thus, reducing atmospheric CO₂ is also recognized as the main remediation method for climate change. Forestry practices play an essential role in atmospheric CO₂ sequestration and global environmental engineering. Forestry carbon sequestration includes forest carbon sequestration and forest product carbon sequestration. Carbon sequestration in forests relies mainly on processes of ecosystem carbon balancing and forest product production, including photosynthesis and ecosystem net primary productivity, stabilization of soil organic carbon, and wood use efficiency and product lifespan. Forestry carbon sequestration can be achieved through (1) expanding forest areas with afforestation practices guided by the “matching trees with site or calcium” principle; (2) increasing forest net productivity with integrated forest management of water, nutrients, and pest or fire control; (3) enhancing the stabilization of soil organic carbon content by clay minerals; (4) promoting the use and improving the lifespan of forest products. At the global scale, an additional 1 Pg (C) of carbon can be sequestrated each year for 30 years by increasing forest area or net productivity by 3.4%, or by converting fuel wood to sawn wood or wood-based panels. Furthermore, reducing carbon loss from forest fire by a quarter or elevating soil organic carbon by 0.23% can also decrease carbon emissions by 1 Pg (C) each year. Carbon sequestration in forestry has great potential for reducing atmospheric carbon dioxide and mediating global climate warming.

Key words: carbon sink in forestry, carbon sink in forest, carbon sink in wood products, forest productivity, global climate change, soil organic carbon

CLC Number:

S718.5

ZOU Xiaoming, WANG Guobing, GE Zhiwei, XIE Youchao, RUAN Honghua, WU Xiaoqiao, YANG Yan. Mechanisms and methods for augmenting carbon sink in forestry[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2022, 46(6): 167-176.

Figures/Tables 3

Fig.1

Table 1

Table 2

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地区 region	人口/万人	锯材消费量/ 万m³	人均锯材消费量/ (m³·万人^-1)	人造板消费量/ 万m³	人均人造板消费量/ (m³·万人^-1)
亚洲	464 100	17 600	379	25 000	539
非洲	134 000	1 700	127	500	37
南美洲	47 400	2 400	506	1 400	295
欧洲	74 800	10 900	1 457	7 800	1 043
北中美州	54 800	12 400	2 263	5 600	1 022
大洋洲	4 300	800	1 860	400	930
全球	779 400	45 800	588	40 700	525

阶段	采伐后种类					碳储量/Tg					比例/%		备注
stage	post-cut type					carbon storage					ratio		note
采伐环节	原木		工业用原木			47.24					34.87		碳储量
			工业用原木			47.24					34.87		109.89 Tg;
			直接用原木			38.02					28.07		碳排放
			薪材			-2.79					2.06		28.37 Tg;
	采伐剩余物		做木材产品原材料			21.84					16.12		净碳储量
	采伐剩余物		原地分解			-25.58					18.88		81.52 Tg
阶段 stage	木质林产品原材料碳储量storage of raw material						木质林产品碳储量storage of forest products						备注
	种类 type	碳储量/Tg			比例/%	种类				碳储量/Tg		比例/%	note
	种类 type	carbon storage			ratio	type				carbon storage		ratio
加工及使用环节	除薪材外原木回收纸	85.26			77.58	锯材				19.24		14.24	原材料利
	除薪材外原木回收纸	2.8			2.55	胶合板				18.28		13.53	用率89.5%;
	部分采伐剩余物	21.84			19.87	其他人造板				8.06		5.97	碳储量
						刨花板				0.88		0.65	126.71 Tg;
						纤维板				18.53		13.71	碳排放
						纸和纸板				58.57		43.35	8.41 Tg;
						加工剩余物		焚烧		-3.47		2.57	净碳储量
								填埋	碳排放	-4.94		3.66	118.30 Tg
								填埋	碳封存	3.15		2.33
阶段	种类					碳储量/Tg					比例/%		备注
stage	type					carbon storage					ratio		note
废弃环节(废弃木质林产品)	焚烧					-28.28					22.89		碳储量
	焚烧					-28.28					22.89		55.02 Tg;
	填埋			碳排放		-40.26					32.58		碳排放
				碳排放		-40.26					32.58		68.54 Tg;
				碳封存		25.74					20.83		净碳储量
				碳封存		25.74					20.83		-13.52 Tg
	回收纸					29.28					23.7

Mechanisms and methods for augmenting carbon sink in forestry

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