Download or read book Effects of Varying Dry Period Length on Lactation Performance Efficiency of Production and Reproduction and Energy Status of Dairy Cattle written by Robin Renee Rastani and published by . This book was released on 2005 with total page 156 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 Effects of Dry Period Length on Milk Parameters Animal Health and Reproduction During the Subsequant Lactation in Holstein Dairy Cattle written by Rick Daniel Watters and published by . This book was released on 2006 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Consequences of Dry Period Length and Dietary Energy Source on Physiological Health Variables in Dairy Cows and Calves written by and published by . This book was released on 2017 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shortening Or Omitting the Dry Period in Dairy Cows written by and published by . This book was released on 2016 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pelleted Beet Pulp Substituted for High moisture Corn written by Jennifer Anne Voelker Linton and published by . This book was released on 2002 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impact of Heat Stress on Health Production and Reproductive Performance of Dairy Cows written by Alexandre Lelandy Alves Scanavez and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat stress poses major challenges to the dairy industry, disrupting the well-being and productivity of cows. Besides affecting lactating cows, exposure to heat stress during the dry period increases core body temperature (CBT) and alters hormonal profile and mammary gland development, ultimately affecting milk yield in the subsequent lactation. Reproductive performance is severely reduced in dairy cows exposed to heat stress. Even though it is well accepted that estrus expression is reduced during periods of heat stress, it is not clear whether herd-level indicators of estrus-detection efficiency, such as insemination risk, are impacted during periods of heat stress. This dissertation focused on exploring the use of CBT during the dry period as a predictor of postpartum health, production, and reproductive performance during the subsequent lactation. Furthermore, potential implications of heat stress and other seasonal stressors on insemination risk were evaluated. Study 1 investigated the relationships between CBT during the dry period and health, milk production, and reproduction during the subsequent lactation. Dry cows with increased CBT were more susceptible to health disorders and had reduced milk yield early in the subsequent lactation. No association was observed between CBT during the dry period and reproductive performance after parturition. Study 2 explored factors associated with CBT in dry dairy cows and focused on determining the ideal time of the day to assess CBT of heat-stressed dry cows. Core body temperature was increased in cows pregnant with twins and was associated negatively with gestation length. Furthermore, results indicated that 2215 h is the most appropriate time of the day to assess CBT of dry cows exposed to heat stress. Study 3 aimed to compare physiologic and metabolic characteristics of cooled cows classified as having high or low CBT during the dry period. In addition, this study investigated the association between CBT during the dry period and health, milk yield, and reproductive performance after parturition. Cows with high CBT during the dry period had distinct concentrations of pregnancy-associated glycoprotein and indicators of energy balance during the transition period and had reduced milk yield compared with low-CBT cows. Furthermore, CBT during the dry period was a useful predictor of postpartum health disorders. Reproductive performance, however, did not differ between cows that had high or low CBT during the dry period. Study 4 investigated temporal patterns of insemination risk in large dairy herds and explored associations between insemination risk and herd-level traits. Seasonal variation of insemination risk was minimal, with increased insemination risk observed during autumn. Greater values of insemination risk were observed in dry-lot herds, with low mortality of cows, and longer voluntary waiting period for primiparous cows. In summary, assessment of CBT in dry cows may be a useful tool to identify groups of cows more likely to present health disorders and impaired productive performance after parturition. In addition, insemination risk is not reduced during the summer, but it is severely affected by herd-level traits such as housing system, mortality of cows, and voluntary waiting period for primiparous cows.
Download or read book Metabolic Status Lactation Persistency and Udder Health of Dairy Cows After Different Dry Period Lengths written by and published by . This book was released on 2017 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Dietary Engergy Density on Metabolic Status and Lactation Performance of Periparturient Dairy Cows written by Euler Rabelo and published by . This book was released on 2002 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Designing Foods written by National Research Council and published by National Academies Press. This book was released on 1988-02-01 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This lively book examines recent trends in animal product consumption and diet; reviews industry efforts, policies, and programs aimed at improving the nutritional attributes of animal products; and offers suggestions for further research. In addition, the volume reviews dietary and health recommendations from major health organizations and notes specific target levels for nutrients.
Download or read book Effects of Undegradable Protein Fed Prepartum on Subsequent Lactation Reproduction and Health in Holstein Dairy Cattle written by Robert John Van Saun and published by . This book was released on 1993 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Shortening the Dry Period from 60 to 40 Days on Subsequent Lactational Performance and Colostrium Production of Dairy Cows written by Deborah Jean Grusenmeyer and published by . This book was released on 2007 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variation in Part and Whole Lactation Production Feed Intake Body Weight and Feed Efficiency for Holstein Cows written by Rex A. Sutton and published by . This book was released on 1975 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Varying Blood Compositions on the Productive and Reproductive Performance of Dairy Cows written by M. Siapno-Galang and published by . This book was released on 1990 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction; Importance of the study; Objectives of the study; Review of literature; Productive performance; Dairy animals for philipine conditions; Some factors affecting milk yield; Milk production records; The performance of holstein and their fractional crosses; Reproductive performance; Number of services per conception; Days open; Calving interval; Age at first calving; Birth weight of calves; Effects of season of calving to milk production; Daily vs. regular interval milk recording; The DTRI farm management system; Feeding management; Breeding and health management; Milking management; Materials and methods; Time and location of the study; Data collection; Statistical analyses; Results and discussion; Productive performance; Actual milk yield; Lactation length; Reproductive performance; Calving interval; Days open; Services per conception; Age at first calving; Information on calves; Calf weight; Sex ratio of calves; Incidence of abortions and stillbirths by blood group; Milk production as affected by season of calving; Daily vs. regular interval milk recording; Summary of results; Conclusions, implications and recommendations; Literature cited; Appendices.
Download or read book Effect of Dry Period Length and Early Lactation Milking Frequency on Lactational Milk Yield of Multiparous Dairy Cows written by Javier Fernandez and published by . This book was released on 2004 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Dry Period Length and Transition Period Intervention Strategies to Increase Ruminant Productivity in the Subsequent Lactation written by Katie Elizabeth Olagaray and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book More Milking Days with Lower Yields written by and published by . This book was released on 2018 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
