Effect of Time of Weaning on Performance of Young and Mature Beef Cows and Their Calves in a Fall Calving System PDF Download
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Author: Melissa Dale Hudson
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Languages : en
Pages :
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Author: Melissa Dale Hudson
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Category :
Languages : en
Pages :
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Author: Heidi Renata Buehner
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 102
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Two management systems were evaluated in terms of the effects on cow condition score and body weight changes and calf growth rates. The management systems evaluated were winter supplementation of energy, winter creep feeding and delayed weaning. The calves used in this study were born in September and October of 1981. The 48 cows and their calves were brought to a feedlot situation in December and allotted to four groups to allow controlled feeding of an energy or a non-energy supplement to the cows and a creep feed to the allotted calves. The cows receiving 3.64 kg rolled barley/head/day were not different in either body weight or condition score (1 to 5 condition score scale) from the cows fed a protein (non-energy) supplement which was fed at a level to provide the equivalent protein intake for all the cows. That is, there was no effect of the additional energy present in the rolled barley on the performance of the cows or their nursing calves. Creep feeding had a significant effect on calf end weight (P=.001) and calf rate of gain (P=.001). The creep fed calves were on the average 12.95 kg heavier at the end of the trial and gained an average of 9.34 kg more than the calves not creep fed. Creep feeding, though, in today's marketplace may not be a cost effective alternative for the commercial beef producer. Delayed weaning (DW) significantly increased the ADG of calves between the ages of 196 to 266 days of age (P=.001). Steers gained significantly faster than the heifers during this period (P=.001). DW calves did not have a significantly higher ADG than the control (C) calves during the postweaning period (to yearling age), but the DW ADG from 196 days of age to yearling age was still significantly greater than the C calves (P=.001). Postruminal digestion of milk during the experimental period may be the reason for the additional gains by the DW calves. Delayed weaning of fall born calves appears to be a sound management alternative under western Oregon conditions. Winter supplementation of cows and/or calves during the winter months did not realize significant changes in body weight and condition or the profitability of the sale of beef calves.
Author:
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Category : Agriculture
Languages : en
Pages : 40
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Author: J.L. Cantrell
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Category :
Languages : en
Pages :
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Author: John Gerald Rosecrans
Publisher:
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Category : Beef cattle
Languages : en
Pages : 142
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Two management systems were evaluated in terms of the effects on calf growth, on calf weight produced per cow per year, and on reproductive performance of fall calving cows. The alternative management systems tested were twin foster calf production and, delayed weaning, production of single suckled calves weaned at the end of the spring forage production season. Fall born calves which were single suckled and weaned at approximately 200 days of age served as controls. An evaluation of the effects of twin fostering on maternal-filial behavior and of the effects of cross suckling on calf growth in early life was also conducted. Delayed weaning was evaluated as a model for the demonstration of the effects of metabolizable protein intake on calf growth. Calves used in these studies were born during September and October of 1979. Control (C) calves were weaned at approximately 200 days of age, twin forster (TW) and delayed weaned (DW) single calves were weaned at approximately 291 days of age. Twin fostering resulted in calves 39 kg lighter at 200 days of age than single suckled calves (P
Author: Jennifer Marie Barker
Publisher:
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Category : Beef cattle
Languages : en
Pages : 226
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Author: Michael J. Fields
Publisher: CRC Press
ISBN: 9780849387548
Category : Nature
Languages : en
Pages : 414
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Factors Affecting Calf Crop summarizes the latest information available from leading cattle physiologists and geneticists regarding factors known to influence the production of live calves at weaning. You get practical information on management techniques for improving reproduction efficiency in the herd. You'll also learn about the functioning of the reproductive system and how this may affect reproductive processes in the cow herd. Managers will benefit from a clearer understanding of the factors known to limit efficient reproduction, while veterinarians and other professionals who advise cattlemen will appreciate the substantial reference material and color photographs for defining cow condition scores. Color photographs are also used to illustrate the discussions of testicular thermographies and their applications. Other chapters in the book cover developments in improving reproductive performance of the replacement heifer, the brood cow, and the bull. Topics on reproduction include physiology/endocrinology, the use of growth promotants, genetics and physiological and economic considerations in selecting the age to breed heifers, heritability of fertility, length of the breeding season, prepartum and postpartum nutrition, nursing by the calf, cloning of embryos, and much more.
Author: Kirk Lane Hancock
Publisher:
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Category :
Languages : en
Pages : 120
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Author: Hebbie Thomas Purvis
Publisher:
ISBN:
Category :
Languages : en
Pages : 208
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Author: Henry Ashby Turner
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Category : Calves
Languages : en
Pages : 34
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