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Communication dans un congrès

Digestion of milk by the young rabbit : first results

Abstract : This study aims to determine the digestibility of milk by the young rabbit (21-25d old), taking into account the increment of digesta content and urine excretion. Nineteen litters of nine young rabbits of 21 to 25 days old were used: 12 litters fed exclusively with milk using a controlled suckling (CS group), and 7 litters with free suckling and having access to the pelleted feed of the doe (Control group). The faecal digestibility of milk dry matter was measured between 21 and 25d of age, for CS litters housed in a metabolism cage separated from the doe cage from 15 d old. Between 21 and 25d old, milk intake, feces and urine excretion were daily controlled, and themean increment in digesta content was measured by comparing digesta weight of the whole tract at 21 and 25d old (one kit per litter). Between 21 and 25d, the increment in digesta content averaged by 77% (+8.5 g), sourcing mainly from stomach and caecum contents increase (+57% and +120% resp.). The mean increase for the dry content of the gut (DCGi) from 21 to 25d old was 1.73g DM/kit, and was considered as non digested to calculate the corrected digestibility coefficient of the milk. The milk intake averaged 30 g/d/kit (7.9 g DM/d/kit). No faecal excretion was recorded between 21 and 25d. From the milk intake and increment in digesta content, the corrected digestibility of the milk dry matter reached 78% (minimum=72.1%, maximum = 82.5%). The daily urine excretion averaged 5.1 ml/kit, corresponding to 1.2 g DM/kit. Therefore, the corrected DM retention coefficient of the milk was 63.4%. The quantity of nitrogen excreted in urine was low (0.06g/d/kits), thus the corrected nitrogen retention coefficient for milk reached 82%, and the nitrogen retained (corrected) reached 44 g/d/kit. Accordingly the amount in metabolisable protein for the milk was 90 g/kg (fresh). The corrected energy retention coefficient was estimated to 95%, thus the energy retained (corrected) reached 217 kJ/d/kit, and the content in metabolisable energy for the milk was 27.62 kJ/kg (fresh).
Mots-clés : nutrition
Type de document :
Communication dans un congrès
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https://hal.inrae.fr/hal-02785548
Déposant : Migration Prodinra <>
Soumis le : jeudi 4 juin 2020 - 23:00:54
Dernière modification le : lundi 31 août 2020 - 14:38:02

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  • HAL Id : hal-02785548, version 1
  • PRODINRA : 461666

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Thierry Gidenne, Carole Bannelier, Mélanie Gallois, Muriel Segura, Vincent Lambrecht. Digestion of milk by the young rabbit : first results. 6. American Rabbit Congress, Aug 2018, Goiania, Brazil. ⟨hal-02785548⟩

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