Download or read book Factors Affecting and the Prediction of Dry Matter Intake for Holstein Dairy Cows written by Merrill Glend May and published by . This book was released on 1994 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ruminant Nutrition written by Robert Jarrige and published by John Libbey Eurotext. This book was released on 1989 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with feed evaluation systems, the nutrient requirements of ruminant livestock and the feeding value of a wide range of feedstuffs. This book lists about 800 typical forages, 65 crop residues and 120 concentrate and by-product feeds. It is suitable for teachers, specialist scientists and industrialists.
Download or read book Nutrient Requirements of Dairy Cattle written by National Research Council and published by National Academies Press. This book was released on 2001-02-09 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: This widely used reference has been updated and revamped to reflect the changing face of the dairy industry. New features allow users to pinpoint nutrient requirements more accurately for individual animals. The committee also provides guidance on how nutrient analysis of feed ingredients, insights into nutrient utilization by the animal, and formulation of diets to reduce environmental impacts can be applied to productive management decisions. The book includes a user-friendly computer program on a compact disk, accompanied by extensive context-sensitive "Help" options, to simulate the dynamic state of animals. The committee addresses important issues unique to dairy science-the dry or transition cow, udder edema, milk fever, low-fat milk, calf dehydration, and more. The also volume covers dry matter intake, including how to predict feed intake. It addresses the management of lactating dairy cows, utilization of fat in calf and lactation diets, and calf and heifer replacement nutrition. In addition, the many useful tables include updated nutrient composition for commonly used feedstuffs.
Download or read book Effect of Environment on Nutrient Requirements of Domestic Animals written by National Research Council and published by National Academies Press. This book was released on 1981-02-01 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feed Evaluation written by P. O. Osuji and published by ILRI (aka ILCA and ILRAD). This book was released on 1993-01-01 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NorFor written by Harald Volden and published by Springer Science & Business Media. This book was released on 2011-10-05 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Nutrient Requirements of Beef Cattle written by Subcommittee on Beef Cattle Nutrition and published by National Academies Press. This book was released on 2000-05-16 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Regulation of Feed Intake written by Daan Heide and published by Cabi. This book was released on 1999 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural feeding, feeding modes, preferences and behaviour; Physiological regulation of feed intake: genetic, metabolic, hormonal and neural regulations; Environmental factors and feed intake: feeding behaviour, feed choice and feeding habits.
Download or read book Development and Evaluation of Feed Intake and Energy Balance Prediction Models for Lactating Dairy Cattle written by Dwight Kenneth Roseler and published by . This book was released on 1994 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Nonlinear Regression Models written by David A. Ratkowsky and published by . This book was released on 1990 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The background; An introduction to regression modeling; Nonlinear regression modeling; An illustrative example of regression modeling; The models; Models with one X variable, convex/concave curves; Models with one X variable, sigmoidally shaped curves; Models with one X variable, curves with maxima and minima; Models with more than one explanatory viariable; Other models and excluded models; Obtaining good initial parameter estimates; Summary; References; Table of symbols; Appendix; Author index; Subject index.
Download or read book Dry Matter Intake and Neutral Detergent Fiber Intake of Dairy Cattle written by Dana Marie Allen and published by . This book was released on 2001 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dry matter intake and milk production of grazing lactating Holstein cows and utilization of Cornell net Carbohydrate and Protein System model written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Os objetivos deste trabalho foram avaliar a produção de massa de forragem e composição químico-bromatológica e as frações nitrogenadas e de carboidratos da pastagem de capim-coastcross ((Cynodon dactylon L. (Pers.); a produção e composição do leite, o consumo de matéria seca, a cinética digestiva e a capacidade do programa CNCPS versão 5.0 em predizer a performance de vacas da raça Holandês lactantes, em pastagem de capim-coastcross, suplementada com silagem e 3 ou 6 kg de concentrado/vaca dia. A área experimental foi manejada em sistema de pastejo rotacionado, com 4,7 vacas/ha (5,8 UA/ha). Entre o princípio do mês de maio e o mês de outubro de 2003 as vacas consumiam 17 kg/vaca/dia de silagem de milho. A adubação de manutenção da pastagem foi realizada com 200 kg/ha de N, 80 kg/ha de P2O5 e 160 kg/ha de K2O, distribuídos em seis aplicações a cada dois meses. A pastagem foi irrigada entre os meses de menor precipitação ou após as adubações. A forragem disponível e residual foram amostradas a cada 15 dias e separadas em lâmina verde, bainha + colmo verde e material morto. As análises bromatológicas da forragem selecionada na pastagem foram realizadas em extrusa coletada por uma vaca provida de fístula esofágica. As estimativas de consumo foram realizadas utilizando como indicador o sesquióxido de cromo (Cr2O3). As estimativas das taxas de passagem da fase sólida foram obtidas a partir de uma única administração de 10 g de Cr2O3. A determinação do fluxo de fase líquida foi realizada com Co-EDTA. A produção de leite foi medida diariamente, em todos os animais, nas ordenhas da manhã e da tarde. As amostras de leite foram analisadas para proteína, lactose e gordura. Foi avaliado o modelo CNCPS versão 5.0 na predição do consumo de matéria seca e do desempenho dos animais, os quais foram fornecidos ao programa dados (inputs) referentes aos animais (peso vivo, escore corporal, idade, produção e composição do leite, tipo racial, etc.), ao ambiente (temperatura, umidade relativa do ar, manejo, etc.) e a composição do alimento em cada período experimental. Não houve redução (P>0,05) na produção de MS nos períodos de menor precipitação pluviométrica. Os teores de PB, FDN e lignina na MS do capim-coastcross não diferiram (P>0,05) em função da área, tratamentos e estações do ano. No outono foram observados os menores valores para a DIVMS e os teores mais elevados de FDA. A fração nitrogenada B1 + B2 foi maior no outono, quando comparada às demais estações. A maior fração de carboidratos não fibrosos foi observada na primavera. As demais frações nitrogenadas e de carboidratos tiveram pequenas variações na pastagem ao longo do experimento. O consumo de MS total foi de 3,23% do PV. Os consumos de FDNT, MSP e FDNP diferiram (P0,05) em razão da interação nível de suplemento x estação do ano. Os maiores consumos de MSF foram estimados no verão e no outono para os animais que receberam 3 kg/dia de concentrado. Na cinética de fluxo de fase sólida, os valores estimados da taxa de passagem no retículo-rúmen (k1) e no pós-rúmen (k2) foram de 5,7 e 10,3%, respectivamente, no tratamento com 3 kg de concentrado, e de 5,8 e 15,8%/h no tratamento com 6 kg/dia. As taxas de passagem de fase líquida foram de 9,69 e 12,52% para os tratamentos com 3 e 6 kg de concentrado, respectivamente. A produção de leite das vacas alimentadas com 3 kg (13,30 kg/dia) de concentrado foi menor (P0,05) do que a registrada para os animais que consumiram 6 kg de concentrado (16,0 kg /dia). A interação níveis de suplemento x estação do ano causou variação na porcentagem de gordura do leite. Os teores lácteos de proteína e lactose não diferiram em função do tratamento. Os valores preditos pelo CNCPS para a ingestão voluntária de MS foram próximos àqueles estimados, havendo pequena tendência do modelo em subestimar o valor determinado com o indicador. Segundo o CNCPS, a EM foi o primeiro nutriente limitante para a produção de leite. A predição para os animais que consumiram 6 kg/dia de concentrado foi mais próxima da produção observada. Com a adição da silagem de milho à dieta, houve superestimativa da produção de leite, sendo o principal fator limitante à produção de leite para os tratamentos com 6 e 3 kg/dia de concentrado, a EM e a PM, respectivamente.
Download or read book Factors Affecting Roughage Consumption in the Dairy Cow written by Alfred Aron Rimm and published by . This book was released on 1958 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nutrient Requirements of Beef Cattle written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-06-16 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1944, the National Research Council (NRC) has published seven editions of the Nutrient Requirements of Beef Cattle. This reference has guided nutritionists and other professionals in academia and the cattle and feed industries in developing and implementing nutritional and feeding programs for beef cattle. The cattle industry has undergone considerable changes since the seventh revised edition was published in 2000 and some of the requirements and recommendations set forth at that time are no longer relevant or appropriate. The eighth revised edition of the Nutrient Requirements of Beef Cattle builds on the previous editions. A great deal of new research has been published during the past 14 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 beef in all stages of life, this volume includes new information about phosphorus and sulfur contents; a review of nutritional and feeding strategies to minimize nutrient losses in manure and reduce greenhouse gas production; a discussion of the effect of feeding on the nutritional quality and food safety of beef; new information about nutrient metabolism and utilization; new information on feed additives that alter rumen metabolism and postabsorptive metabolism; and future areas of needed research. The tables of feed ingredient composition are significantly updated. Nutrient Requirements of Beef Cattle represents a comprehensive review of the most recent information available on beef cattle nutrition and ingredient composition that will allow efficient, profitable, and environmentally conscious beef production.
Download or read book Nutrition and Lactation in the Dairy Cow written by Philip C. Garnsworthy and published by Elsevier. This book was released on 2013-10-22 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutrition and Lactation in the Dairy Cow is the proceedings of the 46th University of Nottingham Easter School in Agricultural Science. Said symposium was concerned with the significant advances in the field of nutrition and lactation in the dairy cow. The book is divided in five parts. Part I deals with the principles behind nutrition and lactation of cows. Part II discusses the cow’s nutrient interactions; responses to nutrients that yield protein and energy; and the influence of nutrient balance and milk yields. Part III tackles the efficiency of energy utilization in cows and its relation to milk production. Part IV talks about food intake of cows and the factors that affect it, while Part V deals with the different feeding systems for cows. The text is recommended for those involved in raising cows and dairy production, especially those who would like to know more and make studies about the relationship of nutrition and lactation of cows.
Download or read book Dry Matter Intake Prediction of Holstein Heifers written by Charles J. Hubbert and published by . This book was released on 1991 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phosphorus and Calcium Utilization and Requirements in Farm Animals written by Dorinha M. S. S. Vitti and published by CABI. This book was released on 2010 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains 10 chapters that discuss phosphorus and calcium metabolism, efficiency of utilization, availability, requirements and excretion in livestock and environmental impact.
