Development And Evaluation Of Feed Intake And Energy Balance Prediction Models For Lactating Dairy Cattle
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Development And Evaluation Of Feed Intake And Energy Balance Prediction Models For Lactating Dairy Cattle
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Author : Dwight Kenneth Roseler
language : en
Publisher:
Release Date : 1994
Development And Evaluation Of Feed Intake And Energy Balance Prediction Models For Lactating Dairy Cattle written by Dwight Kenneth Roseler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Determination Of Sources Of Variation And Prediction Of Feed Intake And Efficiency In Dairy Cows
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Author : Malia J. Caputo
language : en
Publisher:
Release Date : 2023
Determination Of Sources Of Variation And Prediction Of Feed Intake And Efficiency In Dairy Cows written by Malia J. Caputo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023 with categories.
Feed is the single greatest expense on a dairy farm, representing approximately half the cost of dairy production over the last ten years. Increasing feed efficiency can reduce feed costs while maintaining milk production levels, improving profitability and sustainability of dairy production. Residual feed intake (RFI) is a measure of feed efficiency that represents the unexplained variation in feed intake after accounting for known energy sinks (i.e., milk energy output, body size, body weight change) within a group of cows managed similarly. Dry matter intake (DMI) is required to determine RFI, yet it is labor intensive and cost prohibitive to collect on most privately-owned dairies. Accurate prediction models of DMI could replace physical measurement, allowing for phenotypic feed efficiency determination on privately-owned dairies. When comparing multiple predictive approaches, traditional linear regression approaches performed as well as, or better than, more advanced techniques. Incorporation of behavioral sensor variables, but not blood metabolites, improved models of DMI, representing an opportunity to improve current models of DMI. Deeper understanding of the mechanisms that contribute to variation in feed efficiency would provide further insight into genetic selection for feed efficiency and can lead to the development of management and nutrition strategies to improve feed efficiency. Postpartum health may influence RFI, given the relationship with energy balance; however, no relationship exists between postpartum health disorders and same-lactation RFI, indicating that genetically selecting for RFI will not inadvertently select for negative health outcomes. Post-absorptive nutrient metabolism was previously identified in beef cattle as a source of variation in RFI, but was not investigated in lactating dairy cows. Between cows divergent in RFI, the blood circulating profile of metabolites differed, indicating differences in fatty acid or amino acid oxidation and providing evidence that post-absorptive nutrient metabolism is a source of variation in RFI of dairy cows. Differences in liver tissue pathways related to oxidative stress, cell cycling, and immune function, and differences in muscle fatty acid and glucose metabolism were identified, suggesting tissue-specific differences that contribute to variation in RFI. This dissertation details deeper understanding of post-absorptive nutrient metabolism as a source of variation in RFI, and ongoing effort will contribute to improving the feed efficiency of the dairy breed, which could have measurable impacts profitability and sustainability of dairy production.
The Development Of A Model For The Prediction Of Feed Intake And Energy Partitioning In Dairy Cows
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Author :
language : en
Publisher:
Release Date : 2014
The Development Of A Model For The Prediction Of Feed Intake And Energy Partitioning In Dairy Cows written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Mathematical Modeling In Nutrition And The Health Sciences
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Author : Janet A. Novotny
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Mathematical Modeling In Nutrition And The Health Sciences written by Janet A. Novotny and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Computers categories.
This volume is the proceedings of the 7th Mathematical Modeling in Experimental Nutrition Conference held at Penn State University July 29 until August 1, 2000. The book addresses the determination of optimal intakes of nutrients and food components to provide lifelong health and reduce incidence of disease. Mathematical modelling provides a means of rigorously defining the functions of a system and using a variety of conditions to stimulate responses. This volume presents the newest advances in modelling and related experimental techniques required to meet the new challenges currently facing nutrition and biological science.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 1994
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Dissertations, Academic categories.
Metabolic Stress In Dairy Cows
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Author : John D. Oldham
language : en
Publisher:
Release Date : 1999
Metabolic Stress In Dairy Cows written by John D. Oldham and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Animal welfare categories.
Evaluation Of Dry Matter Intake Prediction Equations In A Dynamic Model Of Energy Balance In The Dairy Cow Microform
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Author : Jennifer Lynn Ellis
language : en
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
Release Date : 2005
Evaluation Of Dry Matter Intake Prediction Equations In A Dynamic Model Of Energy Balance In The Dairy Cow Microform written by Jennifer Lynn Ellis and has been published by Library and Archives Canada = Bibliothèque et Archives Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Norfor
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Author : Harald Volden
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-10-05
Norfor written by Harald Volden and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-10-05 with Science categories.
NorFor is a semi-mechanistic feed evaluation system for cattle, which is used by advisors in Denmark, Iceland, Norway and Sweden. This book describes in detail the system and it covers five main sections. The first is concerned with information on feed characteristics, feed analysis and feed digestion methods. The second section describes the digestion and metabolism in the gastrointestinal tract and the supply and requirement of energy and metabolizable amino acids. The third section considers the prediction of feed intake and physical structure of the diet. The fourth section focuses on model evaluation and the final section provides information on the IT solutions and feed ration formulation by a non-linear economical optimization procedure. This book will be of significant interest to researchers, students and advisors of cattle nutrition and feed evaluation.
Proceedings
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Author :
language : en
Publisher:
Release Date : 2002
Proceedings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Dairy cattle categories.
Precision Livestock Farming
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Author : Sidney Cox
language : en
Publisher: BRILL
Release Date : 2023-08-28
Precision Livestock Farming written by Sidney Cox and has been published by BRILL this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-08-28 with Technology & Engineering categories.
"Precision Livestock presents the latest scientific results from worldwide research, field studies and practical application. The book contains peer-reviewed papers that were presented at the 1st European Conference on Precision Livestock Farming. The papers focus on physiological identification and monitoring of animals, on farm and in transit, and on the operation of automatic milking systems. Major objectives are secure methods of animal identification for traceability; animal welfare and hygiene. The economic and health effects of implementing precision livestock husbandry are featured in many of them. This first conference was held in parallel with the 4th European Conference on Precision Agriculture - the links between both technologies were drawn and the possible interactions between them were shown for the first time. The potential is to integrate both technologies to encompass the whole farm. Peer-reviewed papers from the Precision Agriculture conference are presented in a companion proceedings, Precision Agriculture."