干旱区生态环境知识资源中心(Arid): Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia

Arid

DOI	10.1017/S0021859621000435
	Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia
	Habte, Abera; Worku, Walelign; Gayler, Sebastian; Ayalew, Dereje; Mamo, Girma
通讯作者	Habte, A (corresponding author), Hawassa Univ, Hawassa, Ethiopia. ; Habte, A (corresponding author), Wolaita Sodo Univ, Wolaita Sodo, Ethiopia.
来源期刊	JOURNAL OF AGRICULTURAL SCIENCE
ISSN	0021-8596
EISSN	1469-5146
出版年	2020
卷号	158 期号:10 页码:855-869
英文摘要	For ensuring food demand of the fast growing population in developing countries, quantification of crop yield gaps and exploring production constraints are very crucial. Sorghum is one of the most important climate change resilient crops in the rainfed farming systems of semi-arid tropics. However, there is little information about yield gaps and production constraints. This study aimed at analysing existing yield gaps and exploring major constraints of sorghum production in Southwest Ethiopia. A crop simulation model approach using AquaCrop and DSSAT was used to estimate potential yield and analyse the yield gaps. Model calibration and evaluation was performed using data from field experiments conducted in 2018 and 2019. Sorghum production constraints were assessed using a survey. The actual and water-limited yield of sorghum ranged from 0.58 to 2.51 and 3.6 to 6.47 t/ha, respectively for the period 2003-17. The regional yield gaps of sorghum for the targeted period were 3.02-3.95 t/ha with a mean value of 3.51 t/ha. Majority of respondent farmers considered seasonal rainfall risk (98%), poor soil fertility (86%), lack of improved varieties (78%) and inadequate weed management (56%) as major factors responsible for the existing yield gaps. The mean exploitable yield gap (2.5 t/ha) between water-limited and actual yield showed the level of existing opportunity for improvement in the actual productivity of sorghum. The gaps also call for introduction of proper interventions such as adoption of improved varieties, planting date adjustment, conservation tillage, fertilizer application and on time weed management.
英文关键词	Actual yield AquaCrop DSSAT potential yield simulation survey
类型	Article ; Proceedings Paper
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000694653600009
WOS关键词	FAO CROP MODEL ; TEF ZUCC. TROTTER ; AQUACROP ; MAIZE ; DROUGHT ; CLIMATE ; STRATEGIES ; TOLERANCE ; NORTHERN ; ZONES
WOS类目	Agriculture, Multidisciplinary
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369134
作者单位	[Habte, Abera; Worku, Walelign] Hawassa Univ, Hawassa, Ethiopia; [Habte, Abera] Wolaita Sodo Univ, Wolaita Sodo, Ethiopia; [Gayler, Sebastian] Hohenheim Univ, Stuttgart, Germany; [Ayalew, Dereje] Bahir Dar Univ, Bahir Dar, Ethiopia; [Mamo, Girma] Ethiopia Inst Agr Res, Addis Ababa, Ethiopia
推荐引用方式 GB/T 7714	Habte, Abera,Worku, Walelign,Gayler, Sebastian,et al. Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia[J],2020,158(10):855-869.
APA	Habte, Abera,Worku, Walelign,Gayler, Sebastian,Ayalew, Dereje,&Mamo, Girma.(2020).Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia.JOURNAL OF AGRICULTURAL SCIENCE,158(10),855-869.
MLA	Habte, Abera,et al."Model-based yield gap analysis and constraints of rainfed sorghum production in Southwest Ethiopia".JOURNAL OF AGRICULTURAL SCIENCE 158.10(2020):855-869.