Spatial variation and factors influencing the soil organic carbon pool in grape-producing areas at the eastern foothills of Helan Mountain in Ningxia

doi:10.11686/cyxb2024312

Abstract

Abstract:

The cultivation of vineyards in arid desert grassland is not only of economic benefit， but also has a potential role in increasing the carbon sink capacity of the ecosystem. In this study， the grape-producing area on the eastern foothills of Helan Mountain in Ningxia was used as a study site. Soil samples were collected from soil layers at successive 20 cm depth increments in a 0-100 cm soil profile between May and July 2023， and the soil organic carbon （SOC） content and the total carbon content were measured. In addition， the active， neutral， and inert SOC content were also measured in the upper soil layer （0-40 cm）， which is intensely disturbed by cultivation. The characteristics of SOC pools were studied for different soil types in typical vineyards using a geospatial interpolation technique and one-way ANOVA and factors influencing their variability are discussed. It was found that： 1） SOC content in the 0-100 cm soil depth ranged from 3.0 to 11.1 g·kg^-1 in the grape-producing area， indicating a lack of soil fertility， with an average SOC density of 52.85 t·ha^-1 and moderate variability. The SOC enrichment coefficient in the upper soil layer （0-40 cm） was greater than 1， indicating a stronger carbon sequestration capacity in the upper soil layer. 2） The total carbon， SOC， active SOC， and inert SOC contents in the upper soil layer （0-40 cm） were higher in the west than in the east of the grape-producing area， which was impacted by organic carbon inputs from grape cultivation and thus has significant spatial heterogeneity. 3） The soil carbon pool in the grape-producing area was stable since inorganic carbon constituted 74.8% of the total carbon and inert SOC accounted for 50% of SOC， resulting in low activity of the soil carbon pool. 4） Due to the different soil development scenarios， characteristics of SOC varied significantly with soil type. Although sandy soil had a SOC density higher than a sierozem soil， its SOC content was lower； sandy soil had the highest SOC density and carbon pool activity resulting in lower SOC stability. These findings provide scientific data for the carbon sink accounting and inventory of vineyard ecosystems at the eastern foothills of the Helan Mountains in Ningxia.

Key words: east foothills of Helan Mountain, vineyards, reclamation activities, soil organic carbon, carbon density

Yu-xia WANG, Ling-tong DU, Zhi-yuan YI, Xiao LUO, Li SU, Cheng-long QIAO, Bin XUE. Spatial variation and factors influencing the soil organic carbon pool in grape-producing areas at the eastern foothills of Helan Mountain in Ningxia[J]. Acta Prataculturae Sinica, 2025, 34(7): 41-53.

Figures/Tables 12

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葡萄园 Vineyards	SOC含量 SOC content （g·kg^-1）	养分等级 Nutrient level	SOC最大值 Maximum SOC content （g·kg^-1）	最大养分等级 Maximum nutrient level	SOC最小值 Minimum SOC content （g·kg^-1）	最小养分等级 Minimum nutrient level	变异系数 CV （%）
金山Jinshan	10.54±0.68a	Ⅳ	14.69	Ⅲ	6.74	Ⅳ	22.3
美贺Meihe	11.11±0.71a	Ⅳ	16.55	Ⅲ	7.38	Ⅳ	25.4
长城Changcheng	7.28±0.60b	Ⅳ	11.05	Ⅳ	4.93	Ⅴ	24.8
新慧彬Xinhuibin	4.65±0.27c	Ⅴ	6.38	Ⅳ	2.92	Ⅵ	21.6
立兰Lilan	7.33±0.60b	Ⅳ	10.26	Ⅳ	5.49	Ⅴ	24.5
西鸽Xige	3.50±0.28cd	Ⅴ	5.75	Ⅳ	1.98	Ⅵ	32.4
红寺堡Hongsibao	3.00±0.20d	Ⅵ	4.98	Ⅴ	1.83	Ⅵ	27.1
全产区Whole area	6.54	Ⅳ	9.95	Ⅳ	4.47	Ⅴ	55.8

葡萄园 Vineyards	SOC含量 SOC content （g·kg^-1）	养分等级 Nutrient level	SOC最大值 Maximum SOC content （g·kg^-1）	最大养分等级 Maximum nutrient level	SOC最小值 Minimum SOC content （g·kg^-1）	最小养分等级 Minimum nutrient level	变异系数 CV （%）
金山Jinshan	10.54±0.68a	Ⅳ	14.69	Ⅲ	6.74	Ⅳ	22.3
美贺Meihe	11.11±0.71a	Ⅳ	16.55	Ⅲ	7.38	Ⅳ	25.4
长城Changcheng	7.28±0.60b	Ⅳ	11.05	Ⅳ	4.93	Ⅴ	24.8
新慧彬Xinhuibin	4.65±0.27c	Ⅴ	6.38	Ⅳ	2.92	Ⅵ	21.6
立兰Lilan	7.33±0.60b	Ⅳ	10.26	Ⅳ	5.49	Ⅴ	24.5
西鸽Xige	3.50±0.28cd	Ⅴ	5.75	Ⅳ	1.98	Ⅵ	32.4
红寺堡Hongsibao	3.00±0.20d	Ⅵ	4.98	Ⅴ	1.83	Ⅵ	27.1
全产区Whole area	6.54	Ⅳ	9.95	Ⅳ	4.47	Ⅴ	55.8

项目 Items	敏感性指标 Sensitivity index	SOC及其组分敏感值 SOC and its component sensitive values				SOC组分分配比例 Distribution ratio of SOC components （%）
项目 Items	敏感性指标 Sensitivity index	SOC	活性SOC Active SOC	中性SOC Neutral SOC	惰性SOC Inert SOC	活性SOC Active SOC	中性SOC Neutral SOC	惰性SOC Inert SOC
葡萄园 Vineyards	金山Jinshan	1.14	5.12	10.60	1.81	38.4	10.8	50.8
	美贺Meihe	0.92	2.56	47.09	0.45	25.0	8.1	66.9
	长城Changcheng	1.55	1.52	16.89	0.56	28.3	3.7	68.0
	新慧彬Xinhuibin	0.57	16.81	49.84	0.87	21.5	19.6	58.9
	立兰Lilan	1.10	1.20	2.36	0.28	12.1	25.9	62.0
	西鸽Xige	0.76	12.59	25.14	9.11	21.4	29.6	49.1
	红寺堡Hongsibao	0.66	6.80	5.21	5.05	29.6	16.4	53.9
	均值Average value	0.96	6.66	22.45	2.59	25.2	14.0	60.8
土壤类型 Soil types	砾石土Gravelly soil	1.21	3.06	24.86	0.94	29.0	6.5	64.5
	灰钙土Sierozem	0.93	6.89	13.75	4.69	21.4	22.1	56.5
	风沙土Aeolian sandy soil	0.61	11.81	27.52	2.96	21.3	20.9	57.8
	均值Average value	0.92	7.25	22.04	2.86	24.4	15.5	60.1

项目 Items	敏感性指标 Sensitivity index	SOC及其组分敏感值 SOC and its component sensitive values				SOC组分分配比例 Distribution ratio of SOC components （%）
项目 Items	敏感性指标 Sensitivity index	SOC	活性SOC Active SOC	中性SOC Neutral SOC	惰性SOC Inert SOC	活性SOC Active SOC	中性SOC Neutral SOC	惰性SOC Inert SOC
葡萄园 Vineyards	金山Jinshan	1.14	5.12	10.60	1.81	38.4	10.8	50.8
	美贺Meihe	0.92	2.56	47.09	0.45	25.0	8.1	66.9
	长城Changcheng	1.55	1.52	16.89	0.56	28.3	3.7	68.0
	新慧彬Xinhuibin	0.57	16.81	49.84	0.87	21.5	19.6	58.9
	立兰Lilan	1.10	1.20	2.36	0.28	12.1	25.9	62.0
	西鸽Xige	0.76	12.59	25.14	9.11	21.4	29.6	49.1
	红寺堡Hongsibao	0.66	6.80	5.21	5.05	29.6	16.4	53.9
	均值Average value	0.96	6.66	22.45	2.59	25.2	14.0	60.8
土壤类型 Soil types	砾石土Gravelly soil	1.21	3.06	24.86	0.94	29.0	6.5	64.5
	灰钙土Sierozem	0.93	6.89	13.75	4.69	21.4	22.1	56.5
	风沙土Aeolian sandy soil	0.61	11.81	27.52	2.96	21.3	20.9	57.8
	均值Average value	0.92	7.25	22.04	2.86	24.4	15.5	60.1

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