干旱区生态环境知识资源中心(Arid): Terrestrial carbon stocks following 15 years of integrated watershed management intervention in semi-arid Ethiopia

Arid

DOI	10.1016/j.catena.2020.104543
	Terrestrial carbon stocks following 15 years of integrated watershed management intervention in semi-arid Ethiopia
	Gessesse, Tigist Araya; Khamzina, Asia; Gebresamuel, Girmay; Amelung, Wulf
通讯作者	Khamzina, A
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2020
卷号	190
英文摘要	Our study investigated the total terrestrial stock of organic carbon and its controlling factors in prevalent land-use systems in semi-arid Ethiopia (610 mm of annual rainfall), as part of the impact assessment of the national Integrated Watershed Management (IWM) program. Above- and below-ground biomass and soil organic carbon (SOC) stocks of major land-use systems (i.e., exclosure, cropland, rangeland, and bare land) were quantified after field sampling along a topographic gradient. We found that aboveground carbon stocks peaked in the 15-year-old exclosures (9.08 +/- 1.44 Mg ha(-1)) owing to intact woody and grass vegetation as well as substantial litter cover ( > 20% of the total biomass). Croplands cultivated with wheat and rangelands vegetated with perennial grasses showed average aboveground carbon stocks of 3.16 +/- 0.24 and 1.45 +/- 0.19 Mg ha(-1), respectively. The belowground biomass carbon stock was particularly low in croplands (0.76 +/- 0.09 Mg ha(-1)), exceeded by that in both exclosures and rangelands, where values averaged 3.67 +/- 0.06 and 3.04 +/- 0.42 Mg ha(-1), respectively. The topsoil (0-30 cm) SOC stocks also varied with land-use systems but showed a different order, peaking in rangelands (53.9 +/- 10.1 Mg ha(-1)) and exclosures (41.4 +/- 8.1 Mg ha(-1)), followed by bare lands (29.0 +/- 11.5 Mg ha(-1)) and croplands (26.4 +/- 4.6 Mg ha(-1)). The sub-soils (30-100 cm) added 40% to this SOC storage. The greatest total SOC stock identified in exclosures that had been established primarily on degraded hillslopes may signify a successful restoration effort under the IWM program. However, croplands exhibited the lowest SOC stock, which implies the need for urgent interventions to improve the soil fertility.
英文关键词	Carbon sequestration Biomass carbon Soil organic carbon stock Land-use system Tigray
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000525324600027
WOS关键词	SOIL ORGANIC-CARBON ; DIFFERENT LAND USES ; ROCK FRAGMENTS ; SEQUESTERING CARBON ; NITROGEN STOCKS ; LOESS PLATEAU ; BULK-DENSITY ; MATTER ; TIGRAY ; ROOT
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324333
作者单位	[Gessesse, Tigist Araya; Gebresamuel, Girmay] Mekelle Univ, Dept Land Resources Management & Environm Protect, POB 231, Mekelle, Ethiopia; [Khamzina, Asia] Korea Univ, Div Environm Sci & Ecol Engn, 145 Anam Ro, Seoul 02841, South Korea; [Amelung, Wulf] Univ Bonn, Inst Crop Sci & Resources Conservat INRES, Soil Sci & Soil Ecol, Nussallee 13, D-53115 Bonn, Germany
推荐引用方式 GB/T 7714	Gessesse, Tigist Araya,Khamzina, Asia,Gebresamuel, Girmay,et al. Terrestrial carbon stocks following 15 years of integrated watershed management intervention in semi-arid Ethiopia[J],2020,190.
APA	Gessesse, Tigist Araya,Khamzina, Asia,Gebresamuel, Girmay,&Amelung, Wulf.(2020).Terrestrial carbon stocks following 15 years of integrated watershed management intervention in semi-arid Ethiopia.CATENA,190.
MLA	Gessesse, Tigist Araya,et al."Terrestrial carbon stocks following 15 years of integrated watershed management intervention in semi-arid Ethiopia".CATENA 190(2020).