Author: Elizabeth Mary O'Rourke
Publisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 160

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Book Description

Author: Dorinha M. S. S. Vitti
Publisher: CABI
ISBN: 1845936272
Category : Animal nutrition
Languages : en
Pages : 190

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Book Description
This book contains 10 chapters that discuss phosphorus and calcium metabolism, efficiency of utilization, availability, requirements and excretion in livestock and environmental impact.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 16

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Book Description

Author: Alexander N. Hristov
Publisher: CABI Publishing
ISBN: 9780851990132
Category : Technology & Engineering
Languages : en
Pages : 288

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Book Description
Interactions between Cattle and the Environment: a General Introduction; Nitrogen Requirements of Cattle; Nitrogen Metabolism in the RUlDen; Factors Affecting the Efficiency of Nitrogen Utilization in the RUlDen; Whole-anilnal Nitrogen Balance in Cattle Phosphorus Metabolism in the RUlDen; Phosphorus Metabolism in Rwninants and Requirements of Cattle; Etfects ofDietary Phosphorus and Nitrogen on Cattle Reproduction; lnproving the EfficielicY cifNutrient Use on Cattle Operations.

Author: R.M.A. Goselink
Publisher:
ISBN:
Category :
Languages : en
Pages : 61

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Book Description
The present study evaluates the effect of different dietary phosphorus (P) levels in dairy cattle during the transition period, focussing on animal performance and animal health. Overfeeding P in the dry period (185% vs. 100% of requirements) did not affect feed intake or milk yield postpartum, but decreased plasma P and Ca concentrations and increased the risk for periparturient hypocalcemia. A reduction of the dietary P content in lactation diets (70% vs. 100%) reduced the average plasma P concentration, increased plasma Ca concentration and P mobilisation and reduced faecal excretion of P. However, no negative effects on cow performance or animal health were found for diets with a P content below calculated requirements in the first eight weeks postpartum.

Author: Ermias Kebreab
Publisher: CABI
ISBN: 1780640420
Category : Technology & Engineering
Languages : en
Pages : 335

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Book Description
In order to meet increasing global demand for meat and animal by-products increasingly intensive animal production is necessary. Creating a sustainable system in animal agriculture that works in different production environments is a major challenge for animal scientists. This book draws together themes on sustainability that have emerged as the most pressing in recent years. Addressing practical topics such as air quality, manure management, animal feeds, production efficiency, environmental sustainability, biotechnology issues, animal welfare concerns, societal impacts and an analysis of the data used to assess the economic sustainability of farms.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 3

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Book Description
Cattle producers may feed phosphorus above the levels required for nutrition and the extra nutrients can therefore end up in the manure, resulting in higher than necessary feed bills and possibly leading to undesirable environmental consequences. This bulletin explains the environmental & economic effects of excess phosphorus in dairy cattle feed, and provides information on the phosphorus requirements of cattle and how to adjust feed rations to minimize costs & phosphorus output to manure while ensuring adequate nutrition.

Author: R.C. Burns
Publisher: Springer Science & Business Media
ISBN: 364280926X
Category : Science
Languages : en
Pages : 198

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Book Description
Our knowledge of the biochemistry and biophysics of dinitrogen fixa tion has developed rapidly in the 15 years since the first N2-fixing enzyme system was successfully extracted from a bacterium. This peri od has produced a literature that now describes the N2 fixation reac tion and the nitrogenase enzyme itself in sophisticated terms, though a detailed reaction mechanism at the chemical level has not yet emerged. It is the purpose of the present monograph to present an in-depth re view, analysis, and integration of this research as is possible with a non-contributed publication and to relate this work to considera tions of N2 fixation that reach beyond the confines of the biochem ist's laboratory. The first section is directed as much toward the general science read er as toward the specialist. It covers the agricultural origins of man's interest in N2 fixation and also pertinent areas of taxonomy, physiology, and evolution. Ecological aspects of the subject include a comprehensive evaluation of the nitrogen cycle leading to a sub stantially greater estimate of the rate of global N2 fixation than previous ones. The treatment is of a survey fashion, in part to pro vide a general over-view of N2 fixation and in part to provide context for the biochemistry and biophysics that follow in the second section.

Author: Simon F. Peek
Publisher: Elsevier Health Sciences
ISBN: 0323396623
Category : Medical
Languages : en
Pages : 849

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Book Description
Diagnose and treat bovine diseases in cattle with Rebhun's Diseases of Dairy Cattle, 3rd Edition — your all-in-one guide to bovine disease management. Organized by body system for quick, convenient reference, this complete resource equips practitioners and students with the knowledge needed to confidently diagnose, treat, and prevent bovine disease. All chapters are updated from the previous edition to reflect the most up-to-date diagnostics and therapeutics, including revised drug usage considerations. An entirely new chapter for this third edition provides easy-to-read, but detailed information on diagnostic laboratory sample submission so that you will know what tests are available and the proper samples to submit. Another entirely new chapter focuses on diseases of the bull. More color photographs and illustrations are provided so that clinical signs and pathology of the diseases and diagnostic procedures commonly used in practice can be visualized. With expanded coverage of herd diseases, this new edition meets the growing need for management of both diseases of individual cows and medical problems affecting whole herds. - Practical overviews for procedures such as blood transfusion, abdominal paracentesis, and ECG give you reliable support for some of the most common procedures in bovine care. - A logical and user-friendly body systems organization makes diagnosis easier and more effective by isolating system-specific diseases and conditions. - Additional public health/safety considerations identify diseases that pose a substantial public threat and detail special measures for related care of dairy cattle. - Addresses the latest treatment innovations, including: antibiotic residue testing, care of individual metabolic disease, troubleshooting, and much more. - Expanded, up-to-date coverage of public health/food safety considerations for practitioners helps to prevent dangerous and costly errors. - Current legal and practical considerations for extra label medications are outlined, and all recommendations for drug usage have been revised according to federal guideline changes, to help ensure that you are familiar with the latest evidence-based guidelines. - NEW! All-new chapter covering diseases specific to or common in the dairy bull offers valuable new content that makes this the most comprehensive resource for veterinary students and practitioners. - NEW! A companion website, hosted by Cornell University with more than 60 neurologic, ultrasound, and endoscopic case study videos, illustrates key concepts discussed throughout the book and brings to life a variety of techniques that are more easily visualized than described in print. - UPDATED! Expanded coverage of herd health features diseases of individual cows, as well as problems affecting entire herds, that challenge today's large animal veterinarians. - NEW! Emphasis on herd health addresses the dairy industry's increased concern over population medicine. - UPDATED! Revised drug usage recommendations and legal considerations present the most current information in these critical areas to help you prevent dangerous or costly errors.

Author: Alyssa R. Dodd
Publisher:
ISBN:
Category : Farms
Languages : en
Pages : 332

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Book Description