PMID: 6412741Sep 1, 1983Paper

The effect of changes in the amount of energy infused as volatile fatty acids on the nitrogen retention and creatinine excretion of lambs wholly nourished by intragastric infusion

The British Journal of Nutrition
F D HovellI McDonald

Abstract

The nitrogen balance and creatinine excretion of wether lambs of 30-48 kg, wholly nourished by the intragastric infusion of nutrients, were measured in two experiments. Four lambs were used in each experiment. In Expt 1 a constant amount of casein was infused into the abomasum (640 mg N/kg body-weight (W)0.75 per d) and the amount of volatile fatty acids (VFA) infused into the rumen ranged from 0 to 670 kJ/kg W0.75 per d as six increments. Expt 2 was of similar design but two levels of casein were infused (530 and 1060 mg N/kg W0.75 per d) and, with each level of casein, VFA infused ranged from 0 to 700 kJ/kg W0.75 per d as seven increments. Daily creatinine excretion was not constant, but varied between 2-d means with standard deviations of between 7.1 and 16.5% (average 13.1%) of the over-all means. There was an apparent correlation between creatinine excretion and the amount of energy infused in six out of eight lambs. There was no effect of the amount of casein infused. In both experiments N balance was negative only when the amount of energy infused was substantially below published values for energy maintenance. In Expt 1, N equilibrium was calculated to be achieved at a gross (VFA plus protein) energy infusion level of 1...Continue Reading

References

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Citations

Jun 1, 1994·Comparative Biochemistry and Physiology. Comparative Physiology·J WolkersJ T Schonewille
Nov 1, 1984·The British Journal of Nutrition·I FattetR I Smart
Jan 1, 1987·The British Journal of Nutrition·F D HovellN A MacLeod
May 1, 1987·The British Journal of Nutrition·G E LobleyV Buchan
Mar 1, 1989·The British Journal of Nutrition·J E Lindberg
Jul 1, 1986·The Proceedings of the Nutrition Society·G E Lobley
Jan 1, 1991·Archiv für Tierernährung·E C Titgemeyer, N R Merchen
Jun 10, 2008·Journal of Animal Science·J van E NolteC P Mathis
Sep 15, 2005·Journal of Animal Science·M S AwawdehD P Gnad
May 16, 2006·Journal of Animal Science·G F SchroederD P Gnad
May 16, 2006·Journal of Animal Science·G F SchroederD P Gnad

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