Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits

Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits

5 tablas, 1 figura. Published online 10 September 2012.

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Main Authors: Belenguer, Álvaro, Abecia, Leticia, Belanche, A., Milne, Eric, Balcells, Joaquín
Format: artículo biblioteca
Language:English
Published: Elsevier
Subjects:Caecotrophy, Caecum, Fibre, Lysine, Starch, Protein metabolism,
Online Access:http://hdl.handle.net/10261/56587
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spelling dig-igm-es-10261-565872018-08-27T08:31:42Z Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits Belenguer, Álvaro Abecia, Leticia Belanche, A. Milne, Eric Balcells, Joaquín Caecotrophy Caecum Fibre Lysine Starch Protein metabolism 5 tablas, 1 figura. Published online 10 September 2012. In rabbits, caecal fermentation relies to a large extent on the type of substrate available for bacteria. Therefore, in order to study the dietary effect of the source of carbohydrate on microbial nitrogen (N) absorption, thirty-two New Zealand growing male rabbits were randomly assigned to four diets formulated using two sources of structural carbohydrates (fibre), alfalfa hay (AH) and sugar beet pulp (SBP), combined with two sources of non-structural carbohydrates (starch), wheat or maize, at a constant fibre/grain sources ratio (0.80/0.20). Microbial N intake was estimated by preventing caecotrophy with a neck collar and, indirectly, by using urinary purine derivative (PD) excretion and microbial 15N-lysine incorporation. No effect of diet on growth was detected (average growth rate 26.6±0.69g/d), although dry matter (DM) intake was greater in animals fed diets with AH as main source of fibre than those receiving SBP (100.2 vs. 90.1g/d; P<0.01). Nonetheless, the latter diets were better digested and no significant differences were observed in digestible organic matter (OM) intake. Between sources of starch, digestibility of DM, OM and N was greater with wheat than maize (P<0.05). Microbial activity in the caecum was stimulated by SBP diets, as indicated by a greater volatile fatty acid concentration (89.6 vs. 67.5mmol/L; P<0.01) and a lower pH (5.7 vs. 6.2; P<0.001). Significantly higher amino acid 15N-enrichments in both caecotrophes and liver were observed with SBP diets and also in maize-fed rabbits when SBP was the main fibre source. However, microbial contribution to tissue amino acids (0.37±0.008) was not affected by the type of fibre. This work was financed by Agribrands Europe España, S.A.Paseig Sant Juan 189-08037 Barcelona,Spain and the Spanish Ministry of Science through the Projects PTR95/0405-OPandPB98-01601. A.Belenguer was supported by afellowship from the Spanish Science and Technology Ministry. Peer reviewed 2012 artículo http://purl.org/coar/resource_type/c_6501 Livestock Science 150(1-3): 94-101 (2012) 1871-1413 http://hdl.handle.net/10261/56587 10.1016/j.livsci.2012.08.005 en http://dx.doi.org/10.1016/j.livsci.2012.08.005 open Elsevier
institution IGM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-igm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del IGM España
language English
topic Caecotrophy
Caecum
Fibre
Lysine
Starch
Protein metabolism
Caecotrophy
Caecum
Fibre
Lysine
Starch
Protein metabolism
spellingShingle Caecotrophy
Caecum
Fibre
Lysine
Starch
Protein metabolism
Caecotrophy
Caecum
Fibre
Lysine
Starch
Protein metabolism
Belenguer, Álvaro
Abecia, Leticia
Belanche, A.
Milne, Eric
Balcells, Joaquín
Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits
description 5 tablas, 1 figura. Published online 10 September 2012.
format artículo
topic_facet Caecotrophy
Caecum
Fibre
Lysine
Starch
Protein metabolism
author Belenguer, Álvaro
Abecia, Leticia
Belanche, A.
Milne, Eric
Balcells, Joaquín
author_facet Belenguer, Álvaro
Abecia, Leticia
Belanche, A.
Milne, Eric
Balcells, Joaquín
author_sort Belenguer, Álvaro
title Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits
title_short Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits
title_full Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits
title_fullStr Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits
title_full_unstemmed Effect of carbohydrate source on microbial nitrogen recycling in growing rabbits
title_sort effect of carbohydrate source on microbial nitrogen recycling in growing rabbits
publisher Elsevier
url http://hdl.handle.net/10261/56587
work_keys_str_mv AT belengueralvaro effectofcarbohydratesourceonmicrobialnitrogenrecyclingingrowingrabbits
AT abecialeticia effectofcarbohydratesourceonmicrobialnitrogenrecyclingingrowingrabbits
AT belanchea effectofcarbohydratesourceonmicrobialnitrogenrecyclingingrowingrabbits
AT milneeric effectofcarbohydratesourceonmicrobialnitrogenrecyclingingrowingrabbits
AT balcellsjoaquin effectofcarbohydratesourceonmicrobialnitrogenrecyclingingrowingrabbits
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