Evaluation of carbon emissions and storage status of citrus orchard in Quzhou City, China

doi:10.3969/j.issn.1004-1524.20250009

Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (11): 2340-2353.DOI: 10.3969/j.issn.1004-1524.20250009

• Environmental Science • Previous Articles Next Articles

Evaluation of carbon emissions and storage status of citrus orchard in Quzhou City, China

SHEN Jiayu¹^,²(), DENG Yan³, ZHANG Jiwen⁴, PENG Guofang⁵, WU Qun⁶, ZHU Qichao³, ZHANG Weifeng¹^,²^,³, LI Bei³^,^*()

1. College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou 311300, China
2. Anhui Key Laboratory of Farmland Ecological Conservation and Efficient Utilization of Nutrient Resources, Hefei 230036, China
3. College of Resources and Environment, China Agricultural University, Beijing 100083, China
4. Quzhou Agricultural Characteristic Industry Development Center, Quzhou 324000, Zhejiang, China
5. Dabaoshan Citrus Professional Cooperative of Changshan County, Changshan 324204, Zhejiang, China
6. Quzhou Agricultural Forestry Science Research Institute, Quzhou 324003, Zhejiang, China

Received:2024-12-31 Online:2025-11-25 Published:2025-12-08

Abstract

Abstract:

To provide a scientific basis for the low-carbon development of citrus orchards, the citrus orchards in Quzhou City, Zhejiang Province of China were selected as the research object, and the life cycle assessment method was adopted in the present study. A carbon accounting method for citrus orchards was established, which covered the production and transportation of input materials, field fertilization management, and orchard carbon sequestration. On this basis, the current status of carbon emissions and storage of citrus orchards in Quzhou City was evaluated. The results showed that: the citrus orchards in Quzhou City were mainly composed of citrus trees with an age of ≥20 years, and the average yield was 43.35 t·hm^-2. The total carbon emissions per unit area (calculated as CO₂ equivalent) was 7.61 t·hm^-2, among which the emissions from the production and transportation of nitrogen fertilizer accounted for the largest proportion (41.66%). The carbon storage per unit area was 66.18 t·hm^-2, and the soil carbon pool in the 0-30 cm soil layer was the main body of carbon sink, accounting for 87.43%. There were differences in carbon emissions and carbon storage among citrus orchards of different tree ages, which were mainly related to the differences in fertilization and management practices among orchards. In the future, orchard management should be further optimized by reducing chemical fertilizer application and increasing the proportion of organic fertilizer substitution, to further improve the carbon emissions reduction and carbon sequestration capacity of citrus orchards.

Key words: citrus orchard, greenhouse gas emissions, carbon sink, carbon source

CLC Number:

S666

SHEN Jiayu, DENG Yan, ZHANG Jiwen, PENG Guofang, WU Qun, ZHU Qichao, ZHANG Weifeng, LI Bei. Evaluation of carbon emissions and storage status of citrus orchard in Quzhou City, China[J]. Acta Agriculturae Zhejiangensis, 2025, 37(11): 2340-2353.

Figures/Tables 8

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基径 Base diameter/cm	树干占比 Proportion of trunk	树根占比 Proportion of roots	树枝占比 Proportion of branches	树叶占比 Proportion of leaves	果实占比 Proportion of fruits
4~<12	31.90	25.70	18.91	12.40	11.09
12~<20	36.09	29.98	13.26	6.37	14.30
20~<24	37.56	32.21	12.63	3.82	13.78

基径 Base diameter/cm	树干占比 Proportion of trunk	树根占比 Proportion of roots	树枝占比 Proportion of branches	树叶占比 Proportion of leaves	果实占比 Proportion of fruits
4~<12	31.90	25.70	18.91	12.40	11.09
12~<20	36.09	29.98	13.26	6.37	14.30
20~<24	37.56	32.21	12.63	3.82	13.78

样本 Sample	样本量 Sample size	面积 Area/hm²	树龄 Tree-age	种植密度 Planting density/hm^-2	基径 Base diameter/cm	产量 Yield/(t·hm^-2)
G1	11	3.34±6.32 a	3.1±1.0 b	867.3±171.9 a	3.14±0.95 c	25.98±18.95 b
G2	11	0.10±0.07 a	6.9±2.0 b	737.7±154.4 ab	6.91±1.97 b	41.25±15.91 a
G3	73	1.07±5.47 a	23.3±7.7 a	702.3±197.3 b	14.77±2.05 a	45.69±20.44 a
全部All	95	1.22±5.28	19.1±10.3	725.5±195.7	12.51±4.65	43.35±20.24

样本 Sample	样本量 Sample size	面积 Area/hm²	树龄 Tree-age	种植密度 Planting density/hm^-2	基径 Base diameter/cm	产量 Yield/(t·hm^-2)
G1	11	3.34±6.32 a	3.1±1.0 b	867.3±171.9 a	3.14±0.95 c	25.98±18.95 b
G2	11	0.10±0.07 a	6.9±2.0 b	737.7±154.4 ab	6.91±1.97 b	41.25±15.91 a
G3	73	1.07±5.47 a	23.3±7.7 a	702.3±197.3 b	14.77±2.05 a	45.69±20.44 a
全部All	95	1.22±5.28	19.1±10.3	725.5±195.7	12.51±4.65	43.35±20.24

指标 Index	不同样本的用量Usage in different samples
指标 Index	G1	G2	G3	全部All
化肥N用量	150.30±118.81 b	297.20±161.15 ab	428.45±236.40 a	381.05±236.37
Usage of N in chemical fertilizer/(kg·hm^-2)
化肥P₂O₅用量	153.93±134.54 b	266.52±132.88 ab	420.49±237.26 a	371.80±235.83
Usage of P₂O₅ in chemical fertilizer/(kg·hm^-2)
化肥K₂O用量	186.40±179.45 b	297.20±161.15 ab	422.66±229.75 a	380.78±230.70
Usage of K₂O in chemical fertilizer/(kg·hm^-2)
有机肥N用量	69.84±70.55 a	49.70±117.95 a	41.91±108.73 a	46.04±105.57
Usage of N in organic fertilizer/(kg·hm^-2)
有机肥P用量	30.27±28.23 a	21.44±49.02 a	25.60±92.04 a	25.66±82.67
Usage of P in organic fertilizer/(kg·hm^-2)
有机肥K用量	31.83±48.98 a	18.29±41.55 a	23.00±93.47 a	23.48±84.51
Usage of K in organic fertilizer/(kg·hm^-2)
有机肥C用量	861.49±1 112.75 a	566.55±1 236.52 a	508.90±1 561.92 a	556.40±1 475.01
Usage of C in organic fertilizer/(kg·hm^-2)
除草剂用量Usage of herbicide/(kg·hm^-2)	2.84±3.40 a	2.13±1.88 a	1.73±1.70 a	1.90±1.99
杀虫剂用量Usage of pesticide/(kg·hm^-2)	0.89±0.42 a	1.05±0.31 a	1.11±0.64 a	1.08±0.59
杀菌剂用量Usage of fungicide/(kg·hm^-2)	0.97±0.76 a	0.61±0.82 a	0.81±1.09 a	0.80±1.02
耗油量Fuel consumption/(kg·hm^-2)	64.55±58.76 a	54.55±31.66 a	62.23±43.44 a	61.61±43.89
耗电量Electricity consumption/(kW·h·hm^-2)	323.18±274.94 b	548.18±236.92 a	361.23±273.26 ab	378.47±274.17

Evaluation of carbon emissions and storage status of citrus orchard in Quzhou City, China

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