Nutritional status of free-ranging tropical zebu dairy cows

Worku Bedada, Ketema
Faculteit Diergeneeskunde
Vakgroep Veterinaire en Biowetenschappen
Ketema Worku Bedada was born on December 13, 1989 in Kersa Malima, Southwest Oromia, Ethiopia. In 2008 he completed his preparatory school at Lemen Senior Secondary and Preparatory School. He obtained his bachelor degree in Animal Science from the Arba Minch University in 2013. He joined the Arba Minch University’s College of Agriculture, Department of Animal Science, and worked as assistant lecturer in 2014. In 2015, he joined Addis Ababa University and studied Master of Science at the Faculty of Veterinary Medicine where he obtained his MSc. in tropical animal health and production. In 2017 he re-joined the College of Agriculture at Arba Minch University (Ethiopia) as lecturer. In September 17, 2017 he started his doctoral studies at Department of Nutrition, Genetics and Ethology (now Department of Veterinary and Biosciences), Faculty of Veterinary Medicine at Ghent University, Belgium. His studies were funded by the VLIR-OUS IUC program.
Academische graad
Doctor in de diergeneeskundige wetenschappen
Taal proefschrift
Prof. dr. Geert P.J. Janssens, Faculty of Veterinary Medicine, Ghent University - Prof. dr. Yisehak Kechero Kebede, College of Agriculture, Arba Minch University
Prof. Dr. Geert Opsomer (chair), Faculty of Veterinary Medicine, UGent - Prof. Dr. Bart Pardon (secretary), Faculty of Veterinary Medicine, UGent - Prof. Dr. Jean-Luc Hornick, Faculty of Veterinary Medicine, University of Liège - Dr. Thomas Schonewille, Faculty of Veterinary Medicine, Utrecht University - Prof. Dr. Veerle Fievez Faculty of Bioscience Engineering, UGent

Korte beschrijving

In many tropical regions, seasonality forms a challenge for dairy cow holders because their animals are typically ranging and are dependent on the seasonal availability of forages. The general aim of this thesis was to develop a targeted nutritional intervention for ranging dairy cows after measuring their nutritional status in different seasons and agroecological regions. A large survey demonstrated that the feed resource availability and concomitant resilience of ranging dairy zebu cattle to the dry season differ between altitude-related agro-ecological zones. It indicates that government policies could benefit from including agro-ecological factors to improve dairy production in tropical regions. In this study, altitude of the Ethiopian Rift Valley determined the impact of the dry season on milk yield in ranging dairy cows. Assuming that altitude per se is not directly causal, further studies are needed to identify which agro-ecological factors are involved. A deeper understanding of these differences will enable targeted interventions to improve milk yield in each agro-ecological zone, especially during the dry season. By extension, any performance – in tropical ranging livestock – will also be improved.


Donderdag 16 december 2021, 17:00
Diergeneeskunde, Salisburylaan 133, 9820 Merelbeke

The public defence will take place on Thursday, December 16, 2021 at 17:00 PM, and can be followed by Zoom: