The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers

The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers

Excessive dietary protein may affect MP use because of energetic costs of excreting excess N. Amino acids also may influence post-ruminal digestion. Therefore, two experiments were designed to evaluate the effects of MP intake and post-ruminal flow of AA on growth performance and pancreatic digestiv...

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Bibliographic Details
Main Author: Sitorski, Leonardo Gomes
Format: Others
Published: North Dakota State University 2019
Subjects:
Beef cattle > Feeding and feeds.
Proteins in animal nutrition.
Amino acids in animal nutrition.
Beef cattle > Metabolism.
Beef cattle > Feed utilization efficiency.
Online Access:https://hdl.handle.net/10365/29229
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spelling ndltd-ndsu.edu-oai-library.ndsu.edu-10365-292292021-09-28T17:10:58Z The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers Sitorski, Leonardo Gomes Beef cattle -- Feeding and feeds. Proteins in animal nutrition. Amino acids in animal nutrition. Beef cattle -- Metabolism. Beef cattle -- Feed utilization efficiency. Excessive dietary protein may affect MP use because of energetic costs of excreting excess N. Amino acids also may influence post-ruminal digestion. Therefore, two experiments were designed to evaluate the effects of MP intake and post-ruminal flow of AA on growth performance and pancreatic digestive enzymes. In experiment 1, treatments supplied different amounts of MP intake to cattle and the effects on growth performance and feeding behavior were evaluated. In experiment 2, duodenal infusion of glutamate or casein was examined and the effects on pancreatic enzymes were measured. Experiment 1 suggests that feeding steers 906 g MP/d in finishing diets supplied enough MP for the greatest growth performance and carcass characteristics. Interestingly, MP intake caused different responses on feeding behavior with greater effects on steers fed 626 and 1444 g MP/d. In experiment 2, casein infusion increased α-amylase activity but not trypsin activity. Glutamate did not influence pancreatic digestive enzymes. 2019-01-22T19:57:10Z 2019-01-22T19:57:10Z 2018 text/thesis https://hdl.handle.net/10365/29229 NDSU policy 190.6.2 https://www.ndsu.edu/fileadmin/policy/190.pdf application/pdf North Dakota State University
collection NDLTD
format Others
sources NDLTD
topic Beef cattle -- Feeding and feeds.
Proteins in animal nutrition.
Amino acids in animal nutrition.
Beef cattle -- Metabolism.
Beef cattle -- Feed utilization efficiency.
spellingShingle Beef cattle -- Feeding and feeds.
Proteins in animal nutrition.
Amino acids in animal nutrition.
Beef cattle -- Metabolism.
Beef cattle -- Feed utilization efficiency.
Sitorski, Leonardo Gomes
The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers
description Excessive dietary protein may affect MP use because of energetic costs of excreting excess N. Amino acids also may influence post-ruminal digestion. Therefore, two experiments were designed to evaluate the effects of MP intake and post-ruminal flow of AA on growth performance and pancreatic digestive enzymes. In experiment 1, treatments supplied different amounts of MP intake to cattle and the effects on growth performance and feeding behavior were evaluated. In experiment 2, duodenal infusion of glutamate or casein was examined and the effects on pancreatic enzymes were measured. Experiment 1 suggests that feeding steers 906 g MP/d in finishing diets supplied enough MP for the greatest growth performance and carcass characteristics. Interestingly, MP intake caused different responses on feeding behavior with greater effects on steers fed 626 and 1444 g MP/d. In experiment 2, casein infusion increased α-amylase activity but not trypsin activity. Glutamate did not influence pancreatic digestive enzymes.
author Sitorski, Leonardo Gomes
author_facet Sitorski, Leonardo Gomes
author_sort Sitorski, Leonardo Gomes
title The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers
title_short The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers
title_full The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers
title_fullStr The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers
title_full_unstemmed The Effects of Metabolizable Protein Intake and Post-Ruminal Flow of Amino Acids on Growth Performance and Pancreatic Digestive Enzymes in Steers
title_sort effects of metabolizable protein intake and post-ruminal flow of amino acids on growth performance and pancreatic digestive enzymes in steers
publisher North Dakota State University
publishDate 2019
url https://hdl.handle.net/10365/29229
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