干旱区生态环境知识资源中心(Arid): Performance of major mechanized rainfed agricultural production in Sudan: Sorghum vulnerability and resilience to climate since 1970

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DOI	10.1016/j.agrformet.2019.107640
	Performance of major mechanized rainfed agricultural production in Sudan: Sorghum vulnerability and resilience to climate since 1970
	Elagib, Nadir Ahmed 1; Khalifa, Muhammad 1,2; Rahma, Abbas E.3,4; Babker, Zryab 1; Gamaledin, Suad Ibrahim 5
通讯作者	Elagib, Nadir Ahmed
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
ISSN	0168-1923
EISSN	1873-2240
出版年	2019
卷号	276
英文摘要	Food security in the African Sahel has frequently been threatened by climate variability and change. A large part of the farming system in the arid and semi-arid region of Sudan is heavily rainfed, with sorghum representing the major crop. This study sheds light on the performance of sorghum production in the major mechanized sector in Sudan since 1970. Despite a significant extensification of the mechanized cultivated area of sorghum, a drastic loss of area at harvest took place during 1970-2016. The sorghum production showed both increases and decreases in the average over time besides high year-to-year variability. Synchronous with the above findings, a significant steady decline of sorghum yield occurred from the 1970s level (744.3 kg/ha) to 476.6 kg/ha since 1982. Based on the ratio of growing season precipitation to reference evapotranspiration, a Standardized Multi-Criteria Drought Index (SMCDI) for the period 1941-2015 was introduced using three drought characteristics, namely drought severity, dry spell and time relative frequency of drought. There occurred 23 mild to extreme droughts and 17 mild to extreme wet cases over the period 1970-2015. Aggregation of the SMCDI with 'climatic' sorghum yield revealed highly variable performance of this crop. Accordingly, 26 vulnerable and 20 resilient sorghum yield years were discernible under drought, near normal or wet conditions due to a combination of factors not only climate, i.e. physio-geographic, socio-economic and institutional factors. Apart from the regional analysis, one representative state was also selected for further in-depth spatio-temporal assessment of the SMCDI, integrated Normalized Difference Vegetation Index (iNDVI), Modified Vegetation Condition Index (MVCI), sorghum yield, precipitation and reference evapotranspiration data over the period 2001-2014. The results also underscored the spatio-temporal and local-scale vulnerability of the farming system under study to climate variability. Such findings urge for interventions in the mechanized rainfed sorghum farming system to enable improvement of its performance, drought vulnerability reduction, development of alternatives, and achievement of food security.
英文关键词	Sorghum production Drought indices Vulnerability Resilience Food security Drought-prone areas
类型	Article
语种	英语
国家	Germany ; Sudan ; Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000500195900032
WOS关键词	FOOD SECURITY ; GADARIF REGION ; DROUGHT RISK ; FED AREAS ; YIELD ; WATER ; LAND ; VEGETATION ; IMPACTS ; POLICIES
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
EI主题词	2019-10-15
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310283
作者单位	1.Univ Appl Sci, Inst Technol & Resources Management Trop & Subtro, TH Koln, D-50679 Cologne, Germany; 2.Univ Cologne, Dept Geog, Albertus Magnus Pl, D-50923 Cologne, Germany; 3.Sudan Univ Sci & Technol, Coll Agr Studies, Dept Agr Engn, Khartoum, Sudan; 4.Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An, Shandong, Peoples R China; 5.Minist Agr & Forestry, Gen Adm Agr Planning & Econ, Juba, Sudan
推荐引用方式 GB/T 7714	Elagib, Nadir Ahmed,Khalifa, Muhammad,Rahma, Abbas E.,et al. Performance of major mechanized rainfed agricultural production in Sudan: Sorghum vulnerability and resilience to climate since 1970[J],2019,276.
APA	Elagib, Nadir Ahmed,Khalifa, Muhammad,Rahma, Abbas E.,Babker, Zryab,&Gamaledin, Suad Ibrahim.(2019).Performance of major mechanized rainfed agricultural production in Sudan: Sorghum vulnerability and resilience to climate since 1970.AGRICULTURAL AND FOREST METEOROLOGY,276.
MLA	Elagib, Nadir Ahmed,et al."Performance of major mechanized rainfed agricultural production in Sudan: Sorghum vulnerability and resilience to climate since 1970".AGRICULTURAL AND FOREST METEOROLOGY 276(2019).