Determination of the Optimum Lysine-energy Ratio for Pigs of 10 to 25 Kg Liveweight PDF Download
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Author: D. S. Nam
Publisher:
ISBN:
Category : Lysine
Languages : en
Pages : 20
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Book Description
Author: D. S. Nam
Publisher:
ISBN:
Category : Lysine
Languages : en
Pages : 20
Get Book Here
Book Description
Author: D. S. Nam
Publisher:
ISBN:
Category : Lysine
Languages : en
Pages : 20
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Book Description
Author: Irmarie Taljaard
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Intense genetic selection for reduced back fat thickness and improved feed utilisation in pigs has resulted in modern genotypes with high lean gain potential, which now deposit a greater amount of lean tissue at faster rates than 20 years ago. As a consequence, to allow pigs to reach their genetic potential for a high capacity of lean tissue gain, higher levels of lysine relative to energy must be fed. The lysine: energy ratio can be largely influenced by genotype, sex, age and health status of the pig. Thus, continues efforts are required to characterise the effects of increasing dietary lysine in evolving modern pig genotypes reared in commercial production environments. The objective of this study was to determine the optimal lysine: energy ratio required for lean growth of a modern pig genotype (PIC337), as well as to determine the growth performance potential under typical commercial conditions. One-hundred-and-eighty PIC337 entire male pigs were used in an experiment with a 2x3 factorial arrangement, including 2 energy levels (2560 kcal NE/kg and 2161 kcal NE/kg) and 3 lysine levels (80%, 100%, 120% of PIC recommendations) in the feed. Thirty-six pens, with 5 pigs per pen, were randomly allocated to 6 treatments (n=6 replicates/treatment). The boars were 9 weeks (63 days) of age at the start of the trial and reared for a period of 17 weeks until slaughter under typical commercial conditions. Average feed intake per pen was measured weekly and all pigs were weighed bi-weekly along with P2 back fat measurements. Average daily feed intake (ADFI), average daily gain (ADG), and feed conversion ratio (FCR) were calculated. The trial continued until 26 weeks (182 days) of age after which all the boars were slaughtered to determine carcass characteristics, including hot carcass weight, cold carcass weight, drip loss %, pH initial, pH ultimate, carcass temperatures as well as back fat thickness. During the grower phase (9 to 18 weeks of age), energy had a significant effect (P 0.05) on body weight gain and FCR, but had no effect (P 0.05) on ADG or ADFI. During the same phase, standardized ileal digestible (SID) lysine had no significant effect (P >0.05) on body weight gain, ADG or ADFI, but had a significant effect (P 0.05) on FCR. Lysine: NE ratio had a significant effect (P
Author: John F. Patience
Publisher: Springer Science & Business Media
ISBN: 9086867561
Category : Science
Languages : en
Pages : 264
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Book Description
'Feed efficiency in swine' has been prepared as a comprehensive treatise on the current state of our understanding of this topic which is so important to the pork industry. Each chapter is written by international authorities who understand both the science and application of their topic area. The book provides detailed insight into the many factors affecting feed efficiency, ranging from diet processing to herd health, from nutrition to physiology and from day-to-day barn management to the adoption of advanced technologies. The authors explain such practical aspects as the challenge of interpreting feed efficiency information obtained on farm or the role of liquid feeding. The authors also delve into more scientific topics such as amino acid or energy metabolism or animal physiology. This book is written for people who have a technical interest in pork production, including nutritionists, geneticists, farm management specialists, veterinarians, other academics and, of course, pork producers.
Author: Subcommittee on Swine Nutrition
Publisher: National Academies Press
ISBN: 0309132649
Category : Technology & Engineering
Languages : en
Pages : 218
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Book Description
The tenth edition of this essential reference presents new knowledge about the nutritional needs of swine that consider such factors as growth rate, carcass leanness, gender, health, environment, and repartitioning agents. New sections are presented on requirements for amino acids and other nutrients. In addition, an original modeling approach to arriving at energy and amino acid needs for given animals is incorporated in this revision. The book comes with a CD-ROM that allows users to create tables of nutrient requirements for swine of a specific body weight and level of productivity. Nutrient Requirements of Swine covers: Biological concepts that underlie nutrient needs for growth and function. New data on amino acid and energy requirements and the factors that shape them. New findings on lysine and the bioavailability of amino acids. New research results on minerals and vitamins. Nutrient composition of an expanded list of feedstuffs. The role of water in swine physiology, including factors that affect the quality of drinking water. Expanded tables of feed ingredients and their nutrient composition provide bioavailability estimates, fatty acid composition of fats typically used in swine diets, and important information on estimating the amino acid content of crude protein.
Author: D. Sauvant
Publisher: Springer Science & Business Media
ISBN: 908686712X
Category : Science
Languages : en
Pages : 418
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Book Description
For more than 30 years, modelling has been an important method for integrating, in a flexible, comprehensive and widely applicable way, basic knowledge and biological concepts on digestion and metabolism in farm animals. The purpose of this book is to present the 'state of art' in this area. The chapters are written by leading teams and researchers in this field of study, mainly from Europe, North America and Australasia. Considerable progress has been made in topics dealing with: modelling methods, feeding behaviour, digestion and metabolic processes in ruminants and monogastric animals. This progress is clearly illustrated by the emergence of a new paradigm in animal nutrition, which has moved from the aim to cover the requirements of the animal to explaining and predicting the responses of the animals to diets (e.g., productivity and efficiency, impact on quality of products, environmental aspects, health and well-being). In this book several chapters illustrate that through empirical models, meta-analysis is an efficient tool to synthesize information gathered over recent decades. In addition, compared with other books on modelling farm animal nutrition, two new aspects received particular attention: expanding knowledge of the individual animal to understanding the functioning and management of herds, and the consideration of the environmental impact of animal production. This book is a valuable source of information for researchers, nutritionists, advisors, and graduate students who want to have up-to-date and concise information on mathematical modelling applied to farm animals.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309031818
Category : Science
Languages : en
Pages : 169
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309224233
Category : Technology & Engineering
Languages : en
Pages : 420
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Book Description
Since 1944, the National Research Council has published 10 editions of the Nutrient Requirements of Swine. This reference has guided nutritionists and other professionals in academia and the swine and feed industries in developing and implementing nutritional and feeding programs for swine. The swine industry has undergone considerable changes since the tenth edition was published in 1998 and some of the requirements and recommendations set forth at that time are no longer relevant or appropriate. The eleventh revised edition of the Nutrient Requirements of Swine builds on the previous editions published by the National Research Council. A great deal of new research has been published during the last 15 years and there is a large amount of new information for many nutrients. In addition to a thorough and current evaluation of the literature on the energy and nutrient requirements of swine in all stages of life, this volume includes information about feed ingredients from the biofuels industry and other new ingredients, requirements for digestible phosphorus and concentrations of it in feed ingredients, a review of the effects of feed additives and feed processing, and strategies to increase nutrient retention and thus reduce fecal and urinary excretions that could contribute to environmental pollution. The tables of feed ingredient composition are significantly updated. Nutrient Requirements of Swine represents a comprehensive review of the most recent information available on swine nutrition and ingredient composition that will allow efficient, profitable, and environmentally conscious swine production.
Author:
Publisher:
ISBN:
Category : Swine
Languages : en
Pages : 560
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Book Description
Author: National Research Council
Publisher: National Academies
ISBN: 0309049970
Category : Technology & Engineering
Languages : en
Pages : 94
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Book Description
In the past decade, animal scientists have learned that administering recombinantly derived somatotropin (growth hormone) to cows improves milk production and that giving beta-adrenergic agonists to meat animals improves productivity and leanness. In order for these metabolic modifiers to yield benefits, however, sound management of the animals' nutrition is necessary. This volume reports on how these substances work in the animals' metabolism, what effects they might have on nutrient requirements of domestic livestock, and what information should be developed further by investigators. The book explores the current understanding of the biology, structure, mechanisms of action, and treatment effects of somatotropin, beta-adrenergic agonists, and anabolic steroids. A companion volume to the Nutrient Requirements of Domestic Animals series, this authoritative volume will be required reading for animal scientists, researchers, veterinarians, livestock farmers, and faculty and students in university animal veterinary science programs.
