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Hawassa, University (2019)

Assessment of small ruminant production system in Hadero Tunto Zuriya Woreda in Kembata Tembaro Zone of Southern Ethiopia and on farm evaluation of replacement value of cowpea (Vigna unguiculata) hay for concentrate mix on performance of sheep fed Napier grass (Pennisetum purpureum) as basal diet

Bedru, M.

Titre : Assessment of small ruminant production system in Hadero Tunto Zuriya Woreda in Kembata Tembaro Zone of Southern Ethiopia and on farm evaluation of replacement value of cowpea (Vigna unguiculata) hay for concentrate mix on performance of sheep fed Napier grass (Pennisetum purpureum) as basal diet

Auteur : Bedru, M.

Université de soutenance : Hawassa, University.

Grade : MSc thesis in Animal and Range Sciences (Specialization : Animal Nutrition) 2019

Résumé
The study comprised field survey and animal feeding trial. For the field survey four representative kebeles were purposively selected from Hadero Tunto Zuriya district and 30 farmers were randomly selected from each kebele. Accordingly, 120 household heads were interviewed to assess the production and marketing system of small ruminants. On-farm feeding and digestibility trial were conducted using 24 (8-10 month old) ram lambs with mean initial body weight of 16.45± 0.19 kg to evaluate replacement value of cowpea forage for concentrate mix on performance of sheep. The treatment used were 300 g concentrate mix (T1), 200 g concentrate mix+100 g cowpea hay (T2), 100 g concentrate mix+200 g cowpea hay (T3) and 300 g cowpea hay (T4) as a supplement to a basal diet of fresh Napier grass fed ad libitum . The feeding and digestibility experiments lasted for 70 days and 7 days, respectively. The purpose of keeping sheep and goat was to generate income followed by meat production and saving. Flock production was constrained by outbreaks of disease and parasites, feed and water shortage, lack of extension support and capital. The highest (P<0.05) total dry matter (DM), organic matter (OM) and metabolizable energy intake was for T1 while the lowest (P<0.05) was for T4. The crude protein (CP) intake for T1 and T2 was greater (P<0.05) than T4 while T3 had an intermediate value. Sheep fed T2 had the highest (P<0.05) DM and OM digestibility as compared to sheep fed other treatment diets. The CP digestibility for T2 and T4 was higher (P<0.05) than that of T1. The average daily gain for T1 and T2 was greater (P<0.001) than T3 and T4. Feed conversion efficiency for T1, T2 and T3 was similar (P>0.05). Based on the marginal analysis, T3 (184.9%) was superior to other treatments. Supplementation of 100g concentrate mix and 200 g cowpea (T3) to a basal diet of Napier grass was found to be more affordable and profitable under the conditions of the current experiment.

Mots Clés : Cowpea, Napier grass, on-farm, substitution, Weight Gain

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