Article (Scientific journals)
Effect Of Various Levels Of Imbalance Between Energy And Nitrogen Release In The Rumen On Microbial Protein Synthesis And Nitrogen Metabolism In Growing Double-Muscled Belgian Blue Bulls Fed A Corn Silage-Based Diet
Valkeners, Damien; Thewis, André; Amant, Stéphanie et al.
2006In Journal of Animal Science, 84 (4), p. 877-885
Peer Reviewed verified by ORBi
 

Files


Full Text
Valkeners2006.pdf
Publisher postprint (270.72 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Energy; Imbalance; Nitrogen; Nitrogen balance; Rumen fermentation; Deséquilibre; Azote; Equilibre azoté; Fermentation ruminale
Abstract :
[en] Seven double-muscled Belgian Blue bulls (initial BW: 341 ± 21 kg) with cannulas in the rumen and proximal duodenum were used in an incomplete replicated Latin square. The study examined the effect of imbalance between energy and N in the rumen on microbial protein synthesis and N metabolism by giving the same diet according to 3 different feeding patterns. The feed ingredients of the diet were separated into 2 groups supplying the same amount of fermentable OM(FOM) but characterized by different levels of ruminally degradable N (RDN). The first group primarily provided energy for the ruminal microbes (12.5 g of RDN/kg of FOM), whereas the second provided greater N (33.3 g of RDN/kg of FOM). These 2 groups were fed to the bulls in different combinations with the aim of creating 3 levels of imbalance (0, 20, and 40 g/ kg of DM) between energy andN supplies in the rumen. Imbalance was measured by the variation of the degradable protein balance (OEB value in the Dutch system) of the diet between the 2 meals each a day. Diurnal variations in ruminal NH3-N concentrations and plasma urea concentrations were greatly influenced by the feeding patterns of the diet. Introduction of imbalance affected neither microbial N flow at the duodenum (P = 0.97) nor efficiency of growth (P = 0.54). The feeding patterns of the diet had no negative impact on NDF degradation in the rumen (P = 0.33). Nitrogen retention was not affected by imbalance (P = 0.74) and reached 49.7, 52.0, and 51.3 g/d, respectively for 0, 20, and 40 g of OEB/kg of DM imbalance. It seems that introduction of an imbalance between energy and N supplies for the ruminal microbes by altering the feeding pattern of the same diet does not negatively influence the microbial activity in the rumen norNretention of the animal. Nitrogen recycling in the rumen plays a major role in regulating the amount of ruminally available N and allows a continuous synchronization of N and energyyielding substrates for the microorganisms in the rumen. Therefore, imbalance between dietary energy and N created over a 24-h interval was not detrimental to rumen microbial growth for the animal as long as the level of imbalance did not exceed 40 g of OEB/kg of DM. Thus, these feeding patterns of the diet can be used under practical feeding conditions with minimal impact on the performance of ruminant animals for meat production.
Disciplines :
Anatomy (cytology, histology, embryology...) & physiology
Animal production & animal husbandry
Author, co-author :
Valkeners, Damien;  Agriculture and Angri-Food Canada
Thewis, André ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Amant, Stéphanie;  Faculté Universitaire des Sciences Agronomiques de Gembloux - FUSAGx > Unité de Zootechnie > 3ème ingénieur
Beckers, Yves  ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Language :
English
Title :
Effect Of Various Levels Of Imbalance Between Energy And Nitrogen Release In The Rumen On Microbial Protein Synthesis And Nitrogen Metabolism In Growing Double-Muscled Belgian Blue Bulls Fed A Corn Silage-Based Diet
Publication date :
2006
Journal title :
Journal of Animal Science
ISSN :
0021-8812
eISSN :
1525-3163
Publisher :
American Society of Animal Science, Savoy, United States - Illinois
Volume :
84
Issue :
4
Pages :
877-885
877-885
Peer reviewed :
Peer Reviewed verified by ORBi
Additional URL :
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture [BE]
Available on ORBi :
since 26 August 2009

Statistics


Number of views
115 (13 by ULiège)
Number of downloads
308 (11 by ULiège)

Scopus citations®
 
12
Scopus citations®
without self-citations
9
OpenCitations
 
9

Bibliography


Similar publications



Contact ORBi