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Author: Madeline J. Zimmermann Publisher: ISBN: Category : Beef cattle Languages : en Pages : 147
Book Description
Mature weight (MWT) in beef cattle has increased over the past 30 yr. In general, larger cows are costlier to maintain than smaller cows, and their profitability depends on their production environment. A wide range of beef production environments exist in the United States. There are also a variety of beef cattle breeds that can be chosen and mated to create a type of cow which will be optimally suited to excel in a given environment. However, there remains a need for tools allowing effective comparison among breeds to facilitate such decision making. Unfortunately, estimated progeny differences (EPD) for MWT are not currently available in most breeds. However, understanding growth to maturity and estimating breed effects for MWT can facilitate more informed breeding systems that rely on MWT as a proxy for cow maintenance costs. First, growth from weaning to maturity was studied using weight data of crossbred cows from the Germplasm Evaluation Program (GPE) at the U.S. Meat Animal Research Center in Clay Center, Nebraska. Brody, spline, and quadratic functions were fitted. For the spline and quadratic functions, MWT was estimated at 6 yr of age from fitted parameters. The spline function seemed to fit these data best, but the Brody function was more reliable for estimating MWT. Its estimated values were consistent even when weights taken at younger ages were used to estimate MWT, with few extreme MWT estimates generated. Second, MWT estimates from the aforementioned functions were analyzed by fitting an animal model including fixed effects of breed fractions and birth year-season contemporary group, and linear covariates of direct and maternal heterosis. Resulting breed covariate solutions were divided by 2 to obtain breed of sire solutions. Breed of sire solutions were adjusted for sire sampling to determine the breed effect for MWT in each of 18 commonly-used beef cattle breeds represented in the GPE population. Since MWT EPD were not available for most breeds, yearling weight EPD was used as a proxy. The breed effects calculated can help seedstock producers identify appropriate breeds that will suit their operation's unique environments and breeding goals.
Author: Madeline J. Zimmermann Publisher: ISBN: Category : Beef cattle Languages : en Pages : 147
Book Description
Mature weight (MWT) in beef cattle has increased over the past 30 yr. In general, larger cows are costlier to maintain than smaller cows, and their profitability depends on their production environment. A wide range of beef production environments exist in the United States. There are also a variety of beef cattle breeds that can be chosen and mated to create a type of cow which will be optimally suited to excel in a given environment. However, there remains a need for tools allowing effective comparison among breeds to facilitate such decision making. Unfortunately, estimated progeny differences (EPD) for MWT are not currently available in most breeds. However, understanding growth to maturity and estimating breed effects for MWT can facilitate more informed breeding systems that rely on MWT as a proxy for cow maintenance costs. First, growth from weaning to maturity was studied using weight data of crossbred cows from the Germplasm Evaluation Program (GPE) at the U.S. Meat Animal Research Center in Clay Center, Nebraska. Brody, spline, and quadratic functions were fitted. For the spline and quadratic functions, MWT was estimated at 6 yr of age from fitted parameters. The spline function seemed to fit these data best, but the Brody function was more reliable for estimating MWT. Its estimated values were consistent even when weights taken at younger ages were used to estimate MWT, with few extreme MWT estimates generated. Second, MWT estimates from the aforementioned functions were analyzed by fitting an animal model including fixed effects of breed fractions and birth year-season contemporary group, and linear covariates of direct and maternal heterosis. Resulting breed covariate solutions were divided by 2 to obtain breed of sire solutions. Breed of sire solutions were adjusted for sire sampling to determine the breed effect for MWT in each of 18 commonly-used beef cattle breeds represented in the GPE population. Since MWT EPD were not available for most breeds, yearling weight EPD was used as a proxy. The breed effects calculated can help seedstock producers identify appropriate breeds that will suit their operation's unique environments and breeding goals.
Author: Subcommittee on Beef Cattle Nutrition Publisher: National Academies Press ISBN: 0309069343 Category : Technology & Engineering Languages : en Pages : 249
Book Description
As members of the public becomes more concious of the food they consume and its content, higher standards are expected in the preparation of such food. The updated seventh edition of Nutrient Requirements of Beef Cattle explores the impact of cattle's biological, production, and environmental diversities, as well as variations on nutrient utilization and requirements. More enhanced than previous editions, this edition expands on the descriptions of cattle and their nutritional requirements taking management and environmental conditions into consideration. The book clearly communicates the current state of beef cattle nutrient requirements and animal variation by visually presenting related data via computer-generated models. Nutrient Requirements of Beef Cattle expounds on the effects of beef cattle body condition on the state of compensatory growth, takes an in-depth look at the variations in cattle type, and documents the important effects of the environment and stress on food intake. This volume also uses new data on the development of a fetus during pregnancy to prescribe nutrient requirements of gestating cattle more precisely. By focusing on factors such as product quality and environmental awareness, Nutrient Requirements of Beef Cattle presents standards and advisements for acceptable nutrients in a complete and conventional manner that promotes a more practical understanding and application.
Author: Lewis Kahn Publisher: CSIRO PUBLISHING ISBN: 0643109900 Category : Technology & Engineering Languages : en Pages : 894
Book Description
Beef Cattle Production and Trade covers all aspects of the beef industry from paddock to plate. It is an international text with an emphasis on Australian beef production, written by experts in the field. The book begins with an overview of the historical evolution of world beef consumption and introductory chapters on carcass and meat quality, market preparation and world beef production. North America, Brazil, China, South-East Asia and Japan are discussed in separate chapters, followed by Australian beef production, including feed lotting and live export. The remaining chapters summarise R&D, emphasising the Australian experience, and look at different production systems and aspects of animal husbandry such as health, reproduction, grazing, feeding and finishing, genetics and breeding, production efficiency, environmental management and business management. The final chapter examines various case studies in northern and southern Australia, covering feed demand and supply, supplements, pasture management, heifer and weaner management, and management of internal and external parasites.
Author: Robert L. Larson Publisher: Elsevier Health Sciences ISBN: 032344878X Category : Medical Languages : en Pages : 305
Book Description
This issue of Veterinary Clinics of North America: Food Animal Practice focuses on Bovine Theriogenology. Article topics include: Reproductive systems for North American Beef Cattle Herds, Reproductive systems for North American Dairy Cattle Herds, Beef Heifer Development, Dairy Heifer Development, Evaluation of data obtained at pregnancy detection of beef herds ,Synchronization and AI Strategies in Beef Herds, Synchronization and AI Strategies in Dairy Herds, Embryo Transfer, Management of reproductive disease in dairy cattle, Venereal Diseases of Cattle, Diagnosis and Control of Neosporosis, Management and Breeding Soundness Examination of Yearling Bulls, and more!
Author: Marleen Felius Publisher: ISBN: 9781570763816 Category : Cattle Languages : en Pages : 0
Book Description
More than 1,000 cattle breeds from around the globe are cataloged in this monumental bovine reference. Each breed, including species found only in prehistory, is provided with a detailed physical description and a watercolor drawn to scale. Cattle are also classified into groups and subgroups according to geographical distribution, historical background, and physical features. Charts indicating breed lineage and records of crossbreeding, maps clearly depicting the location and distribution of authentic and derived breeds, and additional color photographs all round out this unprecedented resource.
Author: Julius Ruechel Publisher: Hachette UK ISBN: 160342587X Category : Technology & Engineering Languages : en Pages : 684
Book Description
Successfully raise grass-fed cattle and enjoy the benefits of great-tasting beef and a financially stable enterprise. In this comprehensive guide, Julius Ruechel covers every aspect of raising healthy and thriving grass-fed cattle, offering advice on herd selection, pasture management, medical care, necessary equipment, winter grazing, slaughtering procedures, and more. With tips on creating a viable business plan and identifying niche markets for your beef, Ruechel provides everything you need to know to develop a profitable and environmentally sustainable grass-fed cattle operation.
Author: Madeline J. Zimmermann
Author: Madeline J. Zimmermann
Author: Subcommittee on Beef Cattle Nutrition
Author: Bruce E. Cunningham
Author: Larry Arnold Nelson
Author: Dixon D. Hubbard
Author: Lewis Kahn
Author: Robert L. Larson
Author: Marleen Felius
Author: Julius Ruechel
Author: National Research Council