Fertility in the High-producing Postpartum Dairy Cow as Affected by Dietary Crude Protein PDF Download

Author: Ellen Rae Jordan
Publisher:
ISBN:
Category : Proteins in animal nutrition
Languages : en
Pages : 90

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Author: W. Haresign
Publisher: Elsevier
ISBN: 148310026X
Category : Technology & Engineering
Languages : en
Pages : 200

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Book Description
Recent Advances in Animal Nutrition-1981 is a collection of papers that discusses the effects of dietary fat on milk composition, relating it to the biochemistry of fat synthesis in the mammary gland. The influence of concentrates on milk composition as well as the pattern and level of concentrate feeding on milk output are also covered. The book describes the need for better utilization of grass and grass products in dairy production, the mineral and trace element requirements of pigs; the importance of anion-cation balance in poultry diets and its effects on performance levels; and the selenium and cobalt requirements of ruminants. The problems of medicinal residues in animal products and the toxicological effects of aflatoxin residues in animal products are also considered. People involved in agriculture, dairy production and animal nutrition will find the book useful.

Author: Ellen Rae Jordan
Publisher:
ISBN:
Category : Proteins in animal nutrition
Languages : en
Pages : 190

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Book Description

Author: M. G. Diskin
Publisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 296

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Book Description

Author: H. H. Van Horn
Publisher: American Dairy Science Association
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 848

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Book Description

Author: Amy Mowrey
Publisher:
ISBN:
Category : Dairy cattle
Languages : en
Pages : 190

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Book Description
Historically speaking, fertility has decreased and milk yield has increased in modern dairy cows. This has led to a large amount of research focusing on increasing pregnancy rate in lactating cows. Some believe that an increase in nutrients fed to early lactation dairy cows is required for high milk production and reproductive function. To test this hypothesis researchers have tried to increase the energy density of the diet or to feed different types of fat (an energy dense nutrient). Three experiments were conducted to test the effects of type and amount of fat fed to lactating dairy cows on fermentation, production and reproductive function. The first experiment compared a control diet (no supplemental fat) to type of raw soybean (cracked or ground) and a rumen inert fat source. Each diet was fed to four rumen-cannulated midlactation dairy cows. The only fermentation parameter affected by diet was the solids passage rate, which decreased for the cracked soybean diet. Reproductive parameters were unchanged by dietary treatments. The second set of experiments tested these diets and others for a longer period of time using more animals. One hundred and fifty-two early lactation dairy cows were fed different levels of fat in a study completed over two years (Year One (Y1) n 84; Year Two (Y2) n = 68). Year One cows were fed a control diet, one with added soybeans, or one containing a rumen-inert fat product. Pretreatment and experimental milk yield were significantly higher for cows fed the control and soybean diets. This was due to random assignment of lower BW cows to the treatment containing the rumen inert fat product. We concluded that no difference due to treatment occurred but instead the difference was due to BW differences. During Y2 cows were fed a control diet or three diets increasing in soybean content. Milk protein percentage decreased as soybeans were added to the diet. Other production parameters were similar across treatments. Plasma cholesterol at week 10 of lactation and amount of total fatty acids in plasma increased with increasing soybean content. Number of estrous cycles for cows fed the lowest soybean diet during Y2 was the only significant change in the reproductive parameters measured for both years. In summary, early lactation dairy cows maintained intake and milk production levels similar to control cows when fed supplemental fat, after taking BW into account. Small changes were noted in plasma fatty acid content and cholesterol during Y2, but these increases were not translated into increases in progesterone concentration or changes in reproductive efficiency or function.

Author: W Haresign
Publisher: Elsevier
ISBN: 1483103536
Category : Technology & Engineering
Languages : en
Pages : 378

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Book Description
Recent Developments in Ruminant Nutrition presents papers that discuss the advancement of the different areas of ruminant nutrition. The book is comprised of 20 chapters that cover topics, such as reproduction, diet, and nutrition. The coverage of the text includes growth stimulation in ruminants; protein quantity and quality for the U.K. dairy cow; and complete-diet feeding of dairy cows. The book also covers rumen fermentation related topics, such as influence of nitrogen and carbohydrate inputs on rumen fermentation; aspects of the biochemistry of rumen fermentation and their implication in ruminant productivity; and manipulation of rumen fermentation. The text will be of great use to researchers and professionals in the animal husbandry industry.

Author: Subcommittee on Beef Cattle Nutrition
Publisher: National Academies Press
ISBN: 0309069343
Category : Technology & Engineering
Languages : en
Pages : 249

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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: Robert Jarrige
Publisher: John Libbey Eurotext
ISBN: 9780861962471
Category : Nature
Languages : en
Pages : 400

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Book Description
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.

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309069971
Category : Technology & Engineering
Languages : en
Pages : 406

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Book Description
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.