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Ten Boran and 12 Boran X Friesian bulls with a mean (+standard error of the mean) age and body weight of 20.2+0.5 months and 225.5+2.5 kg were used over a 1 year period to determine the effect of plane of nutrition and season on body and testicular growth and on semen traits. Within genotype, bul...


Tegegne, AzageDembarga, Y.Kassa, T.Franceschini, R.[Effect of plane of nutrition and season on body and testicular growth and on semen characteristics in Boran and Boran X Friesian bulls in Ethiopia]Effect of plane of nutrition and season on body and testicular growth and on semen characteristics in Boran and Boran X Friesian bulls in Ethiopia

A total of 64 bull calves, composed of 27 Boran and 37 Boran X Friesian, were weaned at 6 months of age and divided into supplement or control groups within breed. All bulls were kept in one paddock and grazed on natural pasture. Supplement groups received 1.5 kg per head day of a diet containing...


Tegegne, AzageEntwistle, K.W.Mukasa-Mugerwa, E.[Gonadal and extragonadal sperm reserves and testicular histometric characteristics in Zebu and crossbred bulls: Effect of dry season nutritional supplementation]Gonadal and extragonadal sperm reserves and testicular histometric characteristics in Zebu and crossbred bulls: Effect of dry season nutritional supplementation

This paper presents the results of a comparative study conducted to characterize the oestrous phenonenon in Zebu and crossbred cattle and to determine oestrus detection using both androgenized cows and entire bulls. The study was conducted at ILRI Debre Zeit Research Station during the dry season...


Tegegne, AzageWitru, G.Mukasa-Mugerwa, E.Kassa, T.[Oestrus phenomenon and oestrus detection efficiency using androgenized cows and entire bulls in Boran and Boran x Friesian crossbred cows]Oestrus phenomenon and oestrus detection efficiency using androgenized cows and entire bulls in Boran and Boran x Friesian crossbred cows

Measurements on testis and linear body size, scrotal circumference (SC), testis diameter (TD) hearth girth (HG), height at wither (HTW) and body length (BDL) at the age of 1, 3, 6, 9, 12, 15, 18 and 21 months was taken. Thirteen Borana Friesian (BoXF) crossbred bull calves born at Holetta Agricul...


Gojam, Y.Tegegne, AzageGebre-Wold, A.Alemayehu, M.Yilma, Z.[Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages]Testicular growth and its relationship with linear body measurements in Borana-Friesian crossbred bull calves at different ages

Twenty-seven Boran and 37 Boran x Friesian bulls, weaned at six months of age, were allocated to either receive supplementary diet (16 percent crude protein and 10.8 MJ/kg DM energy) during the dry season or to serve as unsupplemented controls until 21 months of age. Body weight measurements were...


Tegegne, AzageMukasa-Mugerwa, E.[Body growth and blood metabolite concentrations in Boran and Boran x Friesian bulls grazed on natural pastures: Effect of dry season dietary supplementation]Body growth and blood metabolite concentrations in Boran and Boran x Friesian bulls grazed on natural pastures: Effect of dry season dietary supplementation

Outlines results of a study carried out in Ethiopia, to determine the effect of dry season supplementation on bull's growth and fertility, hence 27 Boran and 37 Boran X Friesian crossbred bulls were weaned at 6 months of age and were randomly assigned to either a dry season supplementary feed con...


Tegegne, AzageEntwistle, K.W.Mukasa-Mugerwa, E.[Nutritional influences on growth and onset of puberty in Boran and Boran X Friesian bulls in Ethiopia]Nutritional influences on growth and onset of puberty in Boran and Boran X Friesian bulls in Ethiopia

Evaluates the growth performance of calves born to Boran cows and weaned at either six or eight months. Early weaned calves were further divided to either receive supplementary feed until eight months of age or serve as controls. There was no significant differences between Boran and crossbred ca...


Tegegne, AzageMukasa-Mugerwa, E.Ketema, H.[Effect of early weaning on the growth performance of Boran and Boran X Friesian bull calves]Effect of early weaning on the growth performance of Boran and Boran X Friesian bull calves

Gondal and extragonadal sperm reserves were determined in testicular and epididymis tissues obtained from Boran and Boran X Friesian bulls fed either a high or low plane of nutrition diet for a one-year period. The bulls were 32 months of age at castration. Mean body weights did not differ betwee...


Tegegne, AzageDembarga, Y.Kassa, T.[Gonadal and extragonadal sperm reserves in Boran and Boran X Friesian bulls raised on two planes of nutrition in the highlands of Ethiopia]Gonadal and extragonadal sperm reserves in Boran and Boran X Friesian bulls raised on two planes of nutrition in the highlands of Ethiopia

Presents results of a trial undertaken in Ethiopia to determine the effect of dry season supplementary feeding on heifers' growth rate & fertility at puberty, hence at 8 months of age, 43 Boran and 46 Boran X Friesian crossbred heifers were randomly divided to either receive a supplementary feed ...


Tegegne, AzageEntwistle, K.W.Mukasa-Mugerwa, E.[Effects of dry season nutritional supplementation on growth, onset of puberty and subsequent fertility in Boran and Boran X Friesian heifers in Ethiopia]Effects of dry season nutritional supplementation on growth, onset of puberty and subsequent fertility in Boran and Boran X Friesian heifers in Ethiopia

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