Effect of imbalance between energy and nitrogen supplies on microbial protein synthesis and nitrogen metabolism in growing double-muscled Belgian Blue bulls

Journal of Animal Science
D ValkenersYves Beckers

Abstract

Six double-muscled Belgian Blue bulls (initial weight: 345 +/- 16 kg) with cannulas in the rumen and proximal duodenum were used in two juxtaposed 3 x 3 Latin squares to study the effect of a lack of synchronization between energy and N in the rumen on microbial protein synthesis and N metabolism by giving the same diet according to three different feeding patterns. The feed ingredients of the diet were separated into two 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 (14.6 g of RDN/kg of FOM), and the second provided N (33.3 g of RDN/kg of FOM). These two groups were fed to the bulls simultaneously or alternately with the aim of creating three different time periods of imbalance (0, 12, or 24 h) between energy and N supplies in the rumen. The introduction of imbalance affected neither microbial-N flow at the duodenum (P = 0.65) nor efficiency of growth (P = 0.69), but decreased (P = 0.016) the NDF degradation in the rumen 12.2% for a 12-h period of imbalance. N retention was not affected by imbalance (P = 0.53) and reached 57.8, 58.5, and 54.7 g/d, respectively, for 0-, 12- and 24...Continue Reading

References

Sep 1, 1974·The British Journal of Nutrition·L D Satter, L L Slyter
Feb 1, 1993·Journal of Dairy Science·A H Gustafsson, D L Palmquist
Nov 24, 1999·Journal of Animal Science·N E Obispo, B A Dehority

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Citations

Mar 4, 2020·Animals : an Open Access Journal From MDPI·Gonzalo Fernandez-TurrenCecilia Cajarville
May 26, 2016·International Journal of Molecular Sciences·Arjan Jonker, Peiqiang Yu
Oct 18, 2007·Journal of Animal Science·C K Reynolds, N B Kristensen
Dec 28, 2012·Tropical Animal Health and Production·Leilson Rocha BezerraAderbal Marcos de Azevedo Silva
Oct 30, 2007·Journal of Animal Science·M B Hall, G B Huntington
Mar 26, 2014·Journal of Animal Science·S A Soto-NavarroC R Krehbiel
Mar 4, 2021·Tropical Animal Health and Production·Bernardo L B MelloRenata S T Silva

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