Dynamic changes in carbon storage and strategies to increase carbon sink of natural arbor forests in Fujian Province, China

doi:10.12302/j.issn.1000-2006.202108046

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (5): 27-32.doi: 10.12302/j.issn.1000-2006.202108046

Special Issue: “双碳”视域下的生态系统固碳增汇（2）

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Dynamic changes in carbon storage and strategies to increase carbon sink of natural arbor forests in Fujian Province, China

XIAO Jun()

Forest Investigation and Planning Institute of Fujian Province, Fuzhou 350003, China

Received:2021-08-27 Revised:2022-01-12 Online:2022-09-30 Published:2022-10-19

Abstract

Abstract:

【Objective】Natural arbor forest biomass carbon pool and its changes were estimated for Fujian Province based on inventory data for forest resources. Strategies for increasing carbon sinks have been put forward, which provided a theoretical basis for the improvement of the carbon sequestration capacity and the scientific management of natural forest.【Method】The carbon storage and the carbon density of the natural arbor forest in Fujian Province were estimated based on four sets of forest inventory data from 2003 to 2018 using the continuous biomass expansion factor method, combined with the carbon fraction and the root shoot ratio of the main forest types.【Result】Results showed that the natural arbor forest carbon storage in Fujian Province increased from 156.11 Tg in 2003 to 248.68 Tg in 2018, with an average annual growth rate of 3.15%. The carbon density increased from 47.30 Mg/hm² in 2003 to 76.24 Mg/hm² in 2018, with an average annual growth rate of 1.93 Mg/hm². The carbon storage of the natural arbor forest was dominated by broad-leaved species including mixed coniferous and broadleaved forest. This accounted for more than 70% of the four forest inventory periods up to 86.47%. From 2003 to 2018, the area of young and middle-age natural arbor forest accounted for 58.78%-73.76%,and the carbon storage accounted for 50.72%-61.90%. The area and the carbon storage were predominantly young and middle-aged forest,but the proportion showed a pronounced downward trend. The proportion of carbon storage was significantly lower than that of the area. The carbon density of the natural arbor forest showed a pronounced upward trend with the increase in forest age. The carbon density of the broadleaved species was higher than that of the coniferous species.【Conclusion】The natural arbor forest carbon storage and the carbon density of Fujian Province show a trend of rapid growth, and the carbon sink capacity markedly enhanced. With the continuous strengthening of natural forest protection and ecological restoration, the dominant young and middle-age forest has entered a fast period for growth. There is considerable potential for natural arbor forest carbon sequestration in the future.

Key words: natural arbor forest, carbon storage, carbon density, increase carbon sink, Fujian Province

CLC Number:

S718

XIAO Jun. Dynamic changes in carbon storage and strategies to increase carbon sink of natural arbor forests in Fujian Province, China[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2022, 46(5): 27-32.

Figures/Tables 4

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References 18

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林分 forest types	面积/×10⁴ hm² area
林分 forest types	2003	2008	2013	2018	2003	2008	2013	2018
马尾松林 Pinus massoniana forest	87.80	40.68	31.04	25.49	5 526.76	2 393.22	2 678.65	2 806.71
其他松类林 other pines and coniferous forest	—	1.44	2.89	3.13	—	82.47	237.15	395.01
杉类林 firs forest	61.34	28.13	23.81	17.56	3 083.46	1 593.81	2 036.30	2 080.68
栎类林 Quercus spp. forest	17.08	3.12	2.41	9.14	2 028.57	217.81	167.69	1 386.82
木荷林 Schima superba forest	—	2.16	3.13	2.17	—	124.54	154.04	197.73
其他硬阔类林 other sclerophyll broadleaved forest	145.78	69.51	14.20	19.02	14 567.99	6 419.93	1 537.92	2 617.74
木麻黄林 Casuarina equisetifolia forest	2.40	0.24	0.24	0.24	80.34	12.25	8.61	3.94
其他软阔类林 other malacophyll broadleaved forest	15.63	3.85	1.44	1.44	1 028.68	230.93	83.72	106.71
针叶混交林 mixed coniferous forest	—	24.03	19.22	19.95	—	1 981.88	1 835.11	2 514.38
阔叶混交林 mixed broadleaved forest	—	110.45	188.33	180.67	—	12 376.96	22 833.58	25 038.94
针阔混交林 mixed coniferous and broadleaved forest	—	42.60	42.14	47.39	—	3 400.93	4 370.15	5 831.22
合计 total	330.03	326.21	328.85	326.20	26 315.80	28 834.73	35 942.92	42 979.88

林分 forest type	参数 parameter		含碳率/% carbon fraction	地上/地下生物量比 biomass ratio of aboveground to underground
	a/ (Mg·m^-3)	b/ (Mg·hm^-2)
	a/ (Mg·m^-3)	b/ (Mg·hm^-2)		幼龄林、中龄林 young forest, middle-age forest	近熟林、成熟林、过熟林 near mature forest, mature forest, over-mature forest
马尾松林 Pinus massoniana forest	0.503 4	20.547 0	52.71	5.18	6.02
其他松类林 other pines and coniferous forest	0.529 2	25.087 0	49.63	5.18	6.02
杉类林 firs forest	0.465 2	19.141 0	51.27	5.18	6.02
栎类林 Quercus spp. forest	1.145 3	8.547 3	47.98	3.97	4.68
木荷林 Schima superba forest	0.978 8	5.376 4	51.15	3.97	4.68
其他硬阔类林 other sclerophyll broadleaved forest	0.978 8	5.376 4	49.01	3.97	4.68
木麻黄林 Casuarina equisetifolia forest	0.744 1	3.237 7	48.93	3.97	4.68
其他软阔类林 other malacophyll broadleaved forest	0.475 4	30.603 4	45.02	3.97	4.68
针叶混交林 mixed coniferous forest	0.516 8	33.237 8	51.68	4.23	5.67
阔叶混交林 mixed broadleaved forest	0.978 8	5.376 4	47.96	3.18	5.23
针阔混交林 mixed coniferous and broadleaved forest	0.813 6	18.466 0	48.93	4.40	4.49

林分 forest type	碳储量/Tg carbon storage				碳密度/(Mg·hm^-2) carbon density
林分 forest type	2003	2008	2013	2018	2003	2008	2013	2018
马尾松林 Pinus massoniana forest	28.51	12.68	12.32	12.00	32.47	31.17	39.69	47.08
其他松类林 other pines and coniferous forest		0.47	1.16	1.68		32.64	40.14	53.67
杉类林 firs forest	15.84	7.74	8.44	7.83	25.82	27.52	35.45	44.59
栎类林 Quercus spp. forest	14.63	1.65	1.27	9.90	85.66	52.88	52.70	108.32
木荷林 Schima superba forest		0.85	1.08	1.30		39.35	34.50	59.91
其他硬阔类林 other sclerophyll broadleaved forest	91.31	40.37	9.58	16.08	62.64	58.08	67.46	84.54
木麻黄林 Casuarina equisetifolia forest	0.42	0.06	0.04	0.02	17.50	25.00	16.67	8.33
其他软阔类林 other malacophyll broadleaved forest	5.40	1.28	0.47	0.52	34.55	33.25	32.64	36.11
针叶混交林 mixed coniferous forest		11.31	9.79	12.10		47.07	50.94	60.65
阔叶混交林 mixed broadleaved forest		76.96	141.16	153.57		69.68	74.95	85.00
针阔混交林 mixed coniferous and broadleaved forest		21.31	25.98	33.68		50.02	61.65	71.07
合计 total	156.11	174.68	211.29	248.68	47.30	53.55	64.25	76.24

龄组 age group	面积/×10⁴ hm² area				碳储量/Tg carbon storage				碳密度/(Mg·hm^-2) carbon density
龄组 age group	2003	2008	2013	2018	2003	2008	2013	2018	2003	2008	2013	2018
幼龄林young forest	103.42	88.10	71.21	41.65	22.87	24.22	25.28	17.35	22.11	27.49	35.50	41.66
中龄林middle-age forest	140.02	141.16	141.18	150.09	73.76	77.39	91.14	108.79	52.68	54.82	64.56	72.48
近熟林near mature forest	55.54	54.60	54.39	55.78	36.03	35.90	41.96	47.64	64.87	65.75	77.15	85.41
成熟林mature forest	26.48	37.29	54.61	66.17	19.30	31.39	45.61	62.04	72.89	84.18	83.52	93.76
过熟林over-mature forest	4.57	5.06	7.46	12.51	4.15	5.78	7.30	12.86	90.81	114.23	97.86	102.80

Dynamic changes in carbon storage and strategies to increase carbon sink of natural arbor forests in Fujian Province, China

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