The development of a metabolizable energy system for horses

Journal of Animal Physiology and Animal Nutrition
Ellen Kienzle, Annette Zeyner

Abstract

The development of a metabolizable energy (ME) system for horses is described. Predictive equations for gross energy and digestible energy (DE) are revisited. The relationship between feed protein content and renal energy losses and the relationship between feed fibre content and methane energy losses were analysed in a literature review to develop predictive equations for ME. In horses, renal energy losses are much higher than losses by methane energy. Renal energy losses were correlated more strictly to protein intake than to digestible protein intake. The reason probably is that per gram of digestible crude protein energy losses are higher for roughage than for concentrates presumably because phenolic acids of forage cell walls contribute to higher urinary energy losses. However, digestibility of protein is lower in forages than in concentrates. The net result is a rather constant urinary energy loss of 0.008 MJ/g of crude protein in the feed. Methane losses in horses are smaller than in ruminants, presumably because of reductive acidogenesis in hind gut fermentation. Methane energy losses in equines are closely related to crude fibre intake. The mean methane energy losses amount to 0.002 MJ ME/g of crude fibre which can be ...Continue Reading

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Citations

Jun 7, 2015·Meat Science·Xabier BelaunzaranNoelia Aldai
Jul 17, 2013·Journal of Animal Physiology and Animal Nutrition·B WichertS Hartnack
Jun 14, 2017·Journal of Animal Physiology and Animal Nutrition·B HippE Kienzle
Jul 12, 2017·Journal of Animal Physiology and Animal Nutrition·J HummelM Clauss
Dec 27, 2019·Animal : an International Journal of Animal Bioscience·W Martin-RossetM Vermorel
May 15, 2020·Journal of Animal Physiology and Animal Nutrition·Marleen KuchlerEllen Kienzle
Jun 20, 2017·Journal of Animal Physiology and Animal Nutrition·M GlatterA Zeyner
Jul 25, 2020·Translational Animal Science·Mark Ebert, Meriel J S Moore-Colyer
Dec 29, 2020·Translational Animal Science·Mark Ebert, Meriel J S Moore-Colyer
Feb 13, 2021·Animal : an International Journal of Animal Bioscience·W Martin-RossetM Vermorel

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