基于坡度视角的黄土高原退耕还林(草)工程碳汇效应分析

doi:10.12302/j.issn.1000-2006.202111033

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南京林业大学学报（自然科学版） ›› 2023, Vol. 47 ›› Issue (1): 180-188.doi: 10.12302/j.issn.1000-2006.202111033

基于坡度视角的黄土高原退耕还林(草)工程碳汇效应分析

姚楠¹(), 刘广全², 姚顺波¹^,^*(), 贾磊¹, 林颖³, 邓元杰¹, 侯孟阳¹

1.西北农林科技大学经济管理学院,陕西杨凌 712100
2.中国水利水电科学研究院, 北京 100048
3.西安交通大学经济与金融学院,陕西西安 710061

收稿日期:2021-11-22 接受日期:2022-01-27 出版日期:2023-01-30 发布日期:2023-02-01
通讯作者: 姚顺波
基金资助:
国家重点研发计划(2016YFC0501705);中国水利水电科学研究院R&D项目(SC0145B012022);中国水利水电科学研究院R&D项目(SC0202A012018)

Analysis of carbon sequestration effect of sloping land conversion program in Loess Plateau from the perspective of slope

YAO Nan¹(), LIU Guangquan², YAO Shunbo¹^,^*(), JIA Lei¹, LIN Ying³, DENG Yuanjie¹, HOU Mengyang¹

1. College of Economics and Management,Northwest A&F University, Yangling 712100, China
2. China Institute of Water Resources and Hydropower Research, Beijing 100048, China
3. College of Economics and Finance, Xi’an Jiaotong University, Xi’an 710061, China

Received:2021-11-22 Accepted:2022-01-27 Online:2023-01-30 Published:2023-02-01
Contact: YAO Shunbo

摘要/Abstract

摘要： 【目的】 探究退耕还林(草)背景下黄土高原不同坡度退耕地的固碳效应及存在的差异,根据不同坡度碳储量的变化优化新一轮退耕还林工程。【方法】 基于2000—2020年黄土高原固碳数据和2000—2015年土地利用数据,运用GIS空间分析法,分析了近20年黄土高原固碳量的时空变化,以及不同坡度退耕地的碳汇效应。【结果】 2000—2020年黄土高原固碳量前期增幅较大,后期增幅较平缓,固碳量变化与森林覆盖面的走向基本一致,呈现南高北低的现象;2000—2015年黄土高原土地利用结构发生明显改变,耕地显著减少,林、草地覆盖率增长至56.42%,且各土地利用类型单位面积固碳量呈增加态势,林地单位面积上固碳量最多;此外,坡度15°~25°林地单位面积上固碳量最大,约716.93 g/m²,8°~15°草地的单位面积固碳量最大,约748.65 g/m²。【结论】 黄土高原退耕还林还草工程带来了巨大的碳汇效应,不同坡度林、草地的固碳能力存在明显差异,缓坡度地带草地固碳能力最强,中高坡度地带林地固碳能力最强。

关键词: 坡度视角, 黄土高原, 退耕还林还草, 碳汇效应

Abstract:

【Objective】 The aims of this research were to explore the difference of carbon sequestration effect of farmland at different slopes on the Loess Plateau under the background of converting farmland to forest, and optimize a new round of converting farmland to forest project according to the change of carbon storage at different slopes. 【Method】 Based on the data of carbon sequestration in the Loess Plateau from 2000 to 2020 and land use data from 2000 to 2015, the spatial and temporal changes of carbon sequestration and the carbon sequestration benefits of farmland with different slopes were analyzed by using GIS spatial analysis method. 【Result】 From 2000 to 2020, carbon sequestration on the Loess Plateau increased significantly in the early stage, but slightly in the later stage. The change of carbon sequestration was basically consistent with the trend of forest cover, showing a phenomenon of high in the south and low in the north. From 2000 to 2015, land use structure of the Loess Plateau changed significantly, cultivaled land decreased significantly, forest and grassland coverage increased to 56.42%, and the carbon sequestration per unit area of each land use type showed an increasing trend, and the carbon sequestration per unit area of forest land was the largest. In addition, the carbon sequestration capacity of grassland was the strongest in areas with a slope lower than 15°, and that of forest was the strongest in areas with a slope higher than 15°. 【Conclusion】 The project of returning cropland to forest and grassland brought about huge carbon sequestration effect in Loess Plateau. The carbon sequestration ability of forest and grassland at different slopes was obviously different. The carbon sequestration ability of grassland at gentle slope was the strongest, and that of forest at middle and high slope was the strongest.

Key words: slope perspective, Loess Plateau, returning farmland to forest and grassland, effect of carbon sequestration

中图分类号:

姚楠,刘广全,姚顺波,等. 基于坡度视角的黄土高原退耕还林(草)工程碳汇效应分析[J]. 南京林业大学学报（自然科学版）, 2023, 47(1): 180-188.

YAO Nan, LIU Guangquan, YAO Shunbo, JIA Lei, LIN Ying, DENG Yuanjie, HOU Mengyang. Analysis of carbon sequestration effect of sloping land conversion program in Loess Plateau from the perspective of slope[J].Journal of Nanjing Forestry University (Natural Science Edition), 2023, 47(1): 180-188.DOI: 10.12302/j.issn.1000-2006.202111033.

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年份 year	坡度/(°) slop	转换面积/ km² conversion area	比率/% ratio
	<8	4 311.25	2.47
	<15	1 235.81	3.61
2000—2005	<25	186.50	4.61
	<35	11.44	5.15
	≥35	0.38	2.52
	<8	6 103.25	3.55
	<15	2 238.31	6.82
2005—2010	<25	262.63	6.69
	<35	14.13	6.48
	≥35	0.81	5.73
	<8	252.00	0.15
	<15	87.81	0.27
2010—2015	<25	32.75	0.84
	<35	6.81	3.23
	≥35	0.19	1.34

基于坡度视角的黄土高原退耕还林(草)工程碳汇效应分析

Analysis of carbon sequestration effect of sloping land conversion program in Loess Plateau from the perspective of slope

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