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Effect of plane of nutrition on comparative weight gains of white Fulani and Friesian X white Fulani crossbred bulls

Action d'un plan de nutrition sur les gains de poids comparés de taureaux zebus peulhs blancs et demi-sang frisons-peulhs blancs

Efecto del plano de nutrición sobre las ganancias de peso comparativas del ganado Blanco Fulani y de toros Friesian X Blanco Fulani

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Summary

Weight gain of purebred White Fulani and1/2-Friesian1/2-White Fulani crossbred bulls were compared in 14 experiments. In all experiments food was offeredad libitum. In seven experiments food was offered on confined management, either in feedlot or in relatively large amounts on a limited area of land. In the other seven experiments the cattle were allowed to graze native, unimproved pasture (shrub savanna). Different quality rations on confined management supported weight gains of the White Fulani bulls varying from−191 to+873 g per day. Different quality range supported weight gains of White Fulanis varying from−141 to+577 g per day. On the range, crossbreds did not gain weight faster than the White Fulanis. On confined management, crossbreds gained weight faster than the White Fulanis but only significantly so on those experiments where the quality of the ration supported a daily gain of more than450 g in the White Fulanis.

We conclude that crossbreds can only be recommended to farmers who are willing and capable of feeding a high quality rationad libitum, under conditions where prehension of the food is not a limiting factor for feed intake. The relative importance of replacing native cattle with crossbreds as a step towards improvement of the productivity of the beef industry in northern Nigeria is discussed.

Résumé

Les gains de poids de taureaux zébus de races Peulh Blanc, pur et demisang Frison, sont comparés dans 14 expériences. Dans toutes les expériences, l'alimentation est distribuéead libitum. Dans 7 essais, l'aliment est distribué sur un espace restreint, soit dans un feed lot, soit sur une surface relativement grande d'un terrain limité. Dans les 7 autres, les animaux sont placés dans un pâturage naturel, non amélioré (savane arbustive).

Des rations de différentes qualités, dans le premier type d'expérience, produisent chez les Peulhs Blancs, des gains de poids variant de 191 à 873 g./jour. Au pâturage, suivant la qualité de ce dernier, les gains varient de 141 à 577 g./jour. Sur pâturage, les demi-sang n'ont pas de gains supérieurs à ceux des Peulhs Blancs. Sur surfaces limitées, les demi-sang ont des gains plus rapides que les Peulhs Blancs mais de façon significative uniquement dans les experiences oú la qualité de la ration permet un gain quotidien supérieur à 450 g. chez les zébus Peulhs.

En conclusion, les demi-sang ne peuvent être recommandés qu'aux fermiers qui le désirent et qui sont capables de fournirad libitum, une ration de haute qualité, à condition que la prèhension de l'aliment ne soit pas un facteur limitant de la consommation.

L'importance relative du remplacement du bétail indigène par des métis comme moyen d'améliorer la productivité de l'industrie de la viande dans le Nord Nigeria, est discutée.

Sumario

Las ganancias de peso de toros puro Blanco Fulani y de 1/2 Friesian 1/2 Fulani fueron comparadas en 14 experimentos. En todos los experimentos el alimento se ofrecióad libitum. En siete experimentos el alimento fue ofrecido en manejo confinado, ya sea en comederos ó en relativamente grandes cantidades en un area limitada de terreno. En los otros siete experimentos se permitió que el ganado pastease en campos con pasto nativo no mejorado (Savanna con arbustos). Raciones differentes en calidad bajo manejo confinado estimularon la ganancia de peso de los toros Blanco Fulani con una variacion de −191 a +873 g por dia. El pastoreo de diferente calidad estimulo ganancias de peso en los Fulani Blancos con una variacion de −141 a +577 g por dia. En el pastoreo, las razas cruzadas no ganaron peso tan ràpido como los Blanco Fulani. Bajo manejo confinado, los cruces ganaron peso mas rápido que los Blanco Fulani pero solo significativamente en aquellos experimentos en los cuales la calidad de la ración permitia una ganancia diaria de mas de 450 g en los Blanco Fulani.

Nosotros concluimos que los cruces solo pueden ser recomendados a ganaderos que quieran y puedan alimentar una ración de alta calidadad libitum bajo condiciones en las cuales la prehensión del alimento no sea un factor limitante en el consumo del mismo. La importancia relativa de reemplazar al ganado nativo con cruces como una medida hacia el mejoramiento de la productividad de la industria de la carne en el norte de Nigeria es discutida.

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Zemmelink, G., de Leeuw, P.N. & Harbers, L.H. Effect of plane of nutrition on comparative weight gains of white Fulani and Friesian X white Fulani crossbred bulls. Trop Anim Health Prod 5, 57–64 (1973). https://doi.org/10.1007/BF02239687

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