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Nutritional impact on health and performance in intensively reared rabbits

Published online by Cambridge University Press:  10 February 2012

J. C. De Blas
J. C. De Blas*
Affiliation:
Departamento de Producción Animal, ETS Ingenieros Agrónomos, Universidad Politécnica, 28040 Madrid, Spain
*
†E-mail: c.deblas@upm.es
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Abstract

The present work summarizes research related to the definition of nutrient recommendations for feeds used in the intensive production of rabbit's meat. Fibre is the main chemical constituent of rabbit diets that typically contain 320 to 360 and 50 to 90 g/kg of insoluble and soluble fibre, respectively. Instead, the dietary contents of cereal grains (∼120 to 160 g/kg), fat (15 to 25 g/kg) and protein concentrates (150 to 180 g/kg) are usually low with respect to other intensively reared monogastric animals. Cell wall constituents are not well digested in rabbits, but this effect is compensated by its stimulus of gut motility, which leads to an increasing rate of passage of digesta, and allows achieving an elevated dry matter intake. A high feed consumption and an adequate balance in essential nutrients are required to sustain the elevated needs of high-productive rabbits measured either as reproductive yield, milk production or growth rate in the fattening period. Around weaning, pathologies occur in a context of incomplete development of the digestive physiology of young rabbits. The supply of balanced diets has also been related to the prevention of disorders by means of three mechanisms: (i) promoting a lower retention time of the digesta in the digestive tract through feeding fibre sources with optimal chemical and physical characteristics, (ii) restricting feed intake after weaning or (iii) causing a lower flow of easily available substrates into the fermentative area by modifying feed composition (e.g. by lowering protein and starch contents, increasing its digestibility or partially substituting insoluble with soluble fibre), or by delaying age at weaning. The alteration in the gut microbiota composition has been postulated as the possible primary cause of these pathologies.

Keywords

nutritionfeed efficiencyperformancegut healthrabbits
Type
Full Paper
Information
animal , Volume 7 , Issue s1: The 8th International Symposium on the Nutrition of Herbivores (ISNH8) 6 – 9th September 2011, Aberystwyth (UK) , March 2013 , pp. 102 - 111
Copyright
Copyright © The Animal Consortium 2012

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