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Author: Katlyn Nicole Niederecker Publisher: ISBN: Category : Languages : en Pages : 94
Book Description
A 2-yr experiment was conducted researching the impact of common lower Midwestern beef cattle winter forage systems on late gestation, spring-calving beef cows and their subsequent calves. We hypothesized that cows grazing stockpiled tall fescue (STF) during late gestation would have increased nutrient intake compared to cows fed summer-baled tall fescue hay (HAY), which would result in improved fetal growth and development, as well as subsequent calf performance and metabolic status. Overall, cows consuming HAY lost more BCS prepartum than cows consuming STF. In yr 2 HAY cows gained more BW prepartum than STF cows, but there was no difference between forage systems in yr 1. Calves born to cows consuming HAY weighed less at birth than calves born to STF cows, suggesting decreased fetal growth. Despite this, in yr 2 there were no differences in calf vigor measures at birth or in triiodothyronine, thyroxine, or cortisol concentrations at 48 h. Additionally, calves born to HAY cows tended to weigh less at d 80 than STF in yr 1, but in yr 2 there was no difference. During yr 1 blood urea nitrogen (BUN) was greater at 48 h for calves born to cows consuming STF and plasma glucose concentrations tended to be greater through weaning for STF calves. Despite this, impacts of late gestation maternal nutrition on calf amino acid concentrations at 48 h varied. In conclusion, grazing stockpiled tall fescue in late gestation appears to improve fetal growth and alter perinatal nutrient supply in calves.
Author: Katlyn Nicole Niederecker Publisher: ISBN: Category : Languages : en Pages : 94
Book Description
A 2-yr experiment was conducted researching the impact of common lower Midwestern beef cattle winter forage systems on late gestation, spring-calving beef cows and their subsequent calves. We hypothesized that cows grazing stockpiled tall fescue (STF) during late gestation would have increased nutrient intake compared to cows fed summer-baled tall fescue hay (HAY), which would result in improved fetal growth and development, as well as subsequent calf performance and metabolic status. Overall, cows consuming HAY lost more BCS prepartum than cows consuming STF. In yr 2 HAY cows gained more BW prepartum than STF cows, but there was no difference between forage systems in yr 1. Calves born to cows consuming HAY weighed less at birth than calves born to STF cows, suggesting decreased fetal growth. Despite this, in yr 2 there were no differences in calf vigor measures at birth or in triiodothyronine, thyroxine, or cortisol concentrations at 48 h. Additionally, calves born to HAY cows tended to weigh less at d 80 than STF in yr 1, but in yr 2 there was no difference. During yr 1 blood urea nitrogen (BUN) was greater at 48 h for calves born to cows consuming STF and plasma glucose concentrations tended to be greater through weaning for STF calves. Despite this, impacts of late gestation maternal nutrition on calf amino acid concentrations at 48 h varied. In conclusion, grazing stockpiled tall fescue in late gestation appears to improve fetal growth and alter perinatal nutrient supply in calves.
Author: Craig A. Roberts Publisher: John Wiley & Sons ISBN: 0891186379 Category : Technology & Engineering Languages : en Pages : 32
Book Description
Fescue toxicosis continues to be one of the most devastating problems in forage–livestock agriculture. Because there is presently no cure, using the most up-to-date management and prevention approaches are crucial. The 2nd edition of this important guide presents an easy-to-understand description of this complex problem, along with recommendations that are practical for real farm use.
Author: Jennifer Denyse Patterson Publisher: ISBN: 9781267438157 Category : Heifers Languages : en Pages : 100
Book Description
Eighty Brahman-influenced cows (5.6 BCS) were assigned to graze common bermudagrass (CB) or toxic tall fescue (E+) during a 60-d breeding season. Body condition (BC) was assessed at d 0, 30, and 60 of breeding season. Cows were managed to achieve marginal (4.2 BCS) or good (6.3 BCS) BC during last trimester. Heifer birth and weaning (WW; 7 to 8 mo) weights were recorded. The Angus sired heifers were weighed and randomly assigned to E+ or non-toxic (Novel) tall fescue at 9 to 10 mo of age for 190d. Heifer weight, growth data, and antral follicle count (AFC) were collected at yearling (11 to 12 mo) and prebreeding (13 to 14 mo). Pasture was experimental unit and heifer age as covariate. Main effects were cow conception forage (ConFor), conception BC (ConBC), last trimester BC (LateBC), and heifer fescue grazed during development (Hfes). Cows grazing E+ ConFor had heifers that weighed less at birth than heifers from cows grazing CB (33.3 vs. 35.2 kg). Cow ConFor x LateBC interaction affected heifer weight and pelvic area. Heifers developed on E+ from marginal-ConBC, E+ ConFor, and marginal-LateBC cows had the lowest ADG. Novel heifer AFC from good-ConBC, CB ConFor, and marginal-LateBC cows was greater than E+ AFC from marginal-ConBC, CB ConFor, and good-LateBC cows (25.1 vs. 3.8 follicles). Cow LateBC x Hfes affected heifer pregnancy rate (90.3, 69.6, 50.0, and 43.8 percent, Novel heifers from good-LateBC cows, Novel heifers from marginal-LateBC cows, E+ heifers from good-LateBC cows, and E+ heifers from marginal-LateBC cows, respectively). Ensuring adequate conception and late-gestation BC and developing heifers on Novel fescue will increase pelvic growth, number of antral follicles, and pregnancy rates of heifer offspring. Industry applicable tools such as monitoring cow BCS, using skeletal growth indicators, and grazing Novel fescue could be beneficial in selecting replacement heifers.
Author: Richard M. Hopper Publisher: John Wiley & Sons ISBN: 1118470850 Category : Medical Languages : en Pages : 2206
Book Description
Bovine Reproduction is a comprehensive, current reference providing information on all aspects of reproduction in the bull and cow. Offering fundamental knowledge on evaluating and restoring fertility in the bovine patient, the book also places information in the context of herd health where appropriate for a truly global view of bovine theriogenology. Printed in full color throughout, the book includes 83 chapters and more than 550 images, making it the most exhaustive reference available on this topic. Each section covers anatomy and physiology, breeding management, and reproductive surgery, as well as obstetrics and pregnancy wastage in the cow. Bovine Reproduction is a welcome resource for bovine practitioners, theriogenologists, and animal scientists, as well as veterinary students and residents with an interest in the cow.
Author: Katlyn Nicole Niederecker
Author: Katlyn Nicole Niederecker
Author: Craig A. Roberts
Author: Jennifer Denyse Patterson
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Author: Richard M. Hopper
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Author: 
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Author: John F. Vallentine
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