Abstract
Isoquinoline Alkaloids and the Ionophore Monensin Supplemented Alone or Combined on Ruminal Fermentation and Nutrient Digestibility in Steers Fed a High-Energy Diet
Highlights
The ionophore Monensin (MON) is commonly included in feedlot cattle growing-finishing diets to enhance feed efficiency
When Isoquinoline Alkaloids (IQA) was added to the control diet, duodenal flow of non-ammonia N (NAN) increased (9.2%) and NH3-N flow decreased (23.7%)
When IQA and MON were added to the Control diet no effect on NAN flow to the small intestine was observed and NH3-N flow decreased only 18.2%
Summary
The ionophore Monensin (MON) is commonly included in feedlot cattle growing-finishing diets to enhance feed efficiency. Duffield et al (2012), observed that the magnitude of response of MON on feed efficiency decreased from 8.1 to 3.5% during the past 4 decades, coincident with increases in diet energy density brought by decreased dietary forage levels, increased use of supplemental fat and flaking grain (Samuelson et al, 2016) These changes in diet formulation lend to enhanced ruminal molar proportions of propionate and decreased methanogenesis (Wang et al, 2018). Supplementation of a high-energy diet with a standardized source of IQA (equivalent from 15.8 to 23.8 mg IQA/kg diet DM) increased ruminal acetate molar ratio, but decreasing butyrate in cannulated steers without affect ruminal propionate ratio (Aguilar-Hernández et al, 2016) These same researchers reported that supplemental IQA increased flow of non-ammonia N to small intestine due to both reduced ruminal on feed protein degradation and increased net microbial protein synthesis. These findings indicate a possible synergistic action on digestion and ruminal fermentation in cattle fed with high-energy diets supplemented with both additives combined
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: American Journal of Animal and Veterinary Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
