Rethinking Fiber Dynamics and Grass Forages

Rick Grant William H. Miner Agricultural Research Institute Grass Fiber Digestion and Rumen Retention Time Recent research conducted at Miner Institute indicates that the mean rumen retention time for marked haycrop silage and corn silage of medium length (1.18-4.75 mm) is approximately 35 to 45 hours for cows consuming about 60 lb/d of dry matter […]

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Microbial Protein Production and Ration Digestibility Variation?

Rick Grant William H. Miner Agricultural Research Institute Increasingly, the focus in ration formulation is on metabolizable protein (MP) and individual amino acids. This move from crude protein to MP and now to amino acids means that we can feed dairy cows more precisely and enhance the efficiency of nitrogen use for milk protein production. […]

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Undigested NDF – What Do We Know?

Rick Grant William H. Miner Agricultural Research Institute Fiber Group Continues its Work An informal “Fiber Group” has been working on improving our ability to model rumen fiber turnover. The group consists of researchers from Cornell University, Miner Institute, University of Bologna, Fencrest, Mertens Innovation & Research, and various scientists from the industry. In particular, […]

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Feeding New Corn Silage

Rick Grant William H. Miner Agricultural Research Institute Corn harvest is mostly completed although a significant number of farms in the Northeast and upper Midwest are facing later harvest of possibly immature or frost-damaged corn silage. Corn development has been delayed and so the risk of frost damage and the need to harvest immature corn […]

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Indigestible Residue Part II – The Key to Digestion Kinetics?

by David R. Mertens, Ph.D, Mertens Innovations & Research LLC To read Part I Indigestible Residue – What it is? Why does it occur? click here. After we have established the biological rationale for indigestible NDF (iNDF), we are in a position to discuss its implications and impact on digestion kinetics. In 1969, USDA-ARS scientist Dale Waldo […]

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Indigestible Residue Part I – What is it? Why does it occur?

by David R. Mertens, PhD Mertens Innovations & Research LLC In Digestion Takes Time, I pointed out that digestion kinetics involves lag, rate, and potential extent of digestion, and indicated that potential extent was the most important of the three. Most, if not all, indigestible residue is indigestible NDF. There are minerals in feeds that are […]

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Using Amaferm to Manage Heat Stress

Howard Jensen, DVM, MS, ACAN BioZyme, Inc Heat stress is just around the corner and despite the advances in environmental cooling, it continues to cost the dairy industry millions of dollars every year. The negative impacts of heat stress include: decreased milk production increased metabolic disorders compromised milk components reduced reproductive performance slowed growth rumen […]

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Digestion Takes Time

David R. Mertens, Ph.D, Mertens Innovations & Research LLC Understanding digestion kinetics is relevant because time and potential extent of digestion are becoming crucial limitations for high-producing animals. When animals produce more, they eat more, and this pushes digesta through the stomach and intestines more rapidly. Faster rates of passage through the digestive tract result in […]

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Heat Stress and Forage Feeding Approaches

Rick Grant William H. Miner Agricultural Research Institute Summer’s heat and humidity are just around the corner. We need to be prepared with effective heat abatement systems that will cool our cows and allow them to respond to the diets fed. Unless a cow is properly cooled, adjusting dietary ingredients and feeding highly digestible forages […]

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