On-farm rice yield and its association with biophysical factors in sub-Saharan Africa
| Autor: | Wilson Dogbe, Moundibaye Dastre Allarangaye, Oladele S. Bakare, Geophrey J. Kajiru, Cyriaque Akakpo, Delphine Mapiemfu Lamare, Illiassou Maïga Mossi, Elie R. Gasore, Kalimuthu Senthilkumar, Kazuki Saito, David Nanfumba, Idriss Baggie, Njato M. Rakotoarisoa, Henri Gbakatchetche, Jean-Martial Johnson, Belay A. Bayuh, Ibrahim Bassoro, Famara Jaiteh, Nianankoro Kamissoko, R. K. Bam, Fanny L. Mabone, Komlan A. Ablede, Jerome Mghase, Atsuko Tanaka, Keita Sékou, Zacharie Segda, Louis P. Yameogo, Raymond Rabeson |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Sub saharan biology business.industry Yield (finance) food and beverages Soil Science Distribution (economics) 04 agricultural and veterinary sciences Plant Science Oryza biology.organism_classification 01 natural sciences Agronomy Farm level Skewness Agriculture 040103 agronomy & agriculture 0401 agriculture forestry and fisheries business Agronomy and Crop Science 010606 plant biology & botany Production system |
| Zdroj: | European Journal of Agronomy. 85:1-11 |
| ISSN: | 1161-0301 |
| Popis: | Although increase in rice (Oryza spp.) production is a common objective for rice-producing countries in sub-Saharan Africa (SSA), basic information on yield and its variation at farm level is lacking. Field surveys were conducted in irrigated lowland (IL), rainfed lowland (RL), and rainfed upland (RU) rice production systems in 19 SSA countries in the 2012–2014 wet seasons. Mean yield varied widely across sites: 2.2–5.8 t/ha, 1.1–5.2 t/ha, and 1.0–2.5 t/ha in IL, RL, and RU, respectively. Rice yield levels differed between the agro-ecological zones (AEZs) with the highest yield in the semi-arid zone in IL, and in the highlands zone for RL and RU. Cluster analysis identified four groups using mean yields, coefficient of variation, and skewness of yield distribution of 42 site–production system combinations. Grouping was related to production system, AEZ, and field water condition. A high-yielding group with 5.3 t/ha mean yield and negative skewness had only four site–production system combinations. Other groups had mean yields from 1.6 to 3.5 t/ha with positive skewness. In these groups, research and development priority for lifting rice yield could be given to low-yielding IL and RL sites with large yield gaps. Raising rice yield in the humid zone irrespective of the production systems and RU across AEZs remain major challenges. Further assessment of the impact of farmers’ agricultural practices on yield variation is warranted to identify potential interventions to realize further yield enhancement. |
| Databáze: | OpenAIRE |
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