Fiches Techniques ISRA. Comparative Study of Intake, Apparent Digestibility and Energy and Nitrogen Uses in Sahelian and Majorera Dairy Goats Fed Hay of Vigna unguiculata [texte imprimé] / Fafa Sow, Auteur ; Khady Niang, Auteur ; Younouss Camara, Auteur ; El Hadji TRAORE, Auteur ; Nassim Moula, Auteur ; Jean François Cabaraux, Auteur ; Ayao Missohou, Auteur ; Jean-Luc Hornick, Auteur . - [S.l.] : journal/animals, 2020 . - 11p. : tab; ref. Langues : Français ( fre) Catégories : | SCIENCES, PRODUCTION ET PROTECTION ANIMALES
| Mots-clés : | metabolism digestibility energy nitrogen breed goat Vigna unguiculata variety 58/74 | Index. décimale : | L022-Valeur nutritive ; digestibilité ; indigestibilité des aliments | Résumé : | This study aimed to compare digestive and metabolic characteristics in Sahelian (S) and Majorera (M) goat breeds. Six lactating females from each breed, with an average weight 27.0 1.93 and 23.7 1.27 kg, respectively, were used. Cowpea hay, variety 58/74, was oered as sole feed ingredient, at a rate of 2 kg of fresh matter per animal per day. The animals were placed in metabolic cages and a digestibility test was conducted according to an adaptation period of 15 days and a collection period of 7 days. The daily chemical components oered and refused and recovered
faeces, urine and milk were measured in order to assess energy and nitrogen utilization. The M and Sgoats had similar levels of dry matter (DM) intake as well as nutrient digestibility. On a metabolic weight basis, dry matter intake, gross energy intake, metabolizable and energy intake, digestible energy and energy lost as methane production were significantly higher (p < 0.01) in M than in Sgoats. Urinary energy excretion was similar (p = 0.9) between breeds, while faecal energy output was higher in M than in S goats. The milk energy output from the M goats was higher than that the S goats (p < 0.05). However, metabolizable to net energy conversion eciency (klm) was not aected by breed (p = 0.37), while N intake, milk N yield and faecal N losses, relative to metabolic weight, were significantly higher (p < 0.05) in M than in S goats. Similarly, the percentage of dietary N intake excreted in urine (UNIN) was higher in S than in M breeds. The breed factor had no eect on N retained, N digestibility, urinary N and N use eciency. In conclusion, the M and S goats were similar in terms of energy and nitrogen use eciency, despite higher daily milk production and DM Animals 2020, |
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