干旱区生态环境知识资源中心(Arid): Intra-seasonal rainfall variability and crop yield in the Upper East Region of Ghana

Arid

DOI	10.1007/s10668-023-03861-2
	Intra-seasonal rainfall variability and crop yield in the Upper East Region of Ghana
	Adimassu, Zenebe; Mul, Marloes; Owusu, Afua
通讯作者	Adimassu, Z
来源期刊	ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
ISSN	1387-585X
EISSN	1573-2975
出版年	2023
英文摘要	Occurrence of frequent dryspell is affecting agriculture; productivity in the semi-arid areas of West Africa such as northern Ghana. The objective of this study was to analyze the effects of dryspells on rainfed maize (early and late maturing), millet, and sorghum yields in a savanna agro-ecosystem in northern Ghana, and suggest management options for reducing their impacts. Long-term dryspell analyses were carried out using INSTAT + v3.37 on climatic data collected over a 30- to 50-year period. The probabilities of dryspells exceeding 7, 10, 14 and 21 days were calculated for crop types during different physiological growth stages and growing seasons of varying lengths. CROPWAT 8.0 was used to determine effective rainfall, crop water requirement, crop water deficit, and changes in yield. The results showed that 80% of the rains begin between the second week of May and the third week of June in the Upper East Region of Ghana. The result also revealed that more dryspells occurred after the initial growth stage of crops. During mid and late stages of crop growth there was a 50% probability of dryspells greater than seven days for early maturing maize and millet and of > 70% for sorghum. Late maturing maize experienced higher crop water deficit than early maturing maize. The result also showed that significant yield reduction (36% reduction in late maturing maize at both Navrongo and Zuarungu) occurs if planting is done before May 21. Similarly, 25 and 23% yield losses, were observed in sorghum at Navrongo and Zuarungu, respectively. We therefore recommend (i) early maturing crop varieties, (ii) adjusting sowing dates based on seasonal climate information, and (iii) improving water management.
英文关键词	CROPWAT model Dryspells Maize Millet Sorghum Sowing date Water management
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001070358300003
WOS关键词	COMMUNAL IRRIGATION SYSTEMS ; SUB-SAHARAN AFRICA ; CLIMATE-CHANGE ; WEST-AFRICA ; ADAPTATION OPTIONS ; PLANTING DATES ; GROWING-SEASON ; MAIZE YIELDS ; DRY SPELLS ; PRODUCTIVITY
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396094
推荐引用方式 GB/T 7714	Adimassu, Zenebe,Mul, Marloes,Owusu, Afua. Intra-seasonal rainfall variability and crop yield in the Upper East Region of Ghana[J],2023.
APA	Adimassu, Zenebe,Mul, Marloes,&Owusu, Afua.(2023).Intra-seasonal rainfall variability and crop yield in the Upper East Region of Ghana.ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY.
MLA	Adimassu, Zenebe,et al."Intra-seasonal rainfall variability and crop yield in the Upper East Region of Ghana".ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY (2023).