Lifetime Effects of Winter Supplemental Feed Level and Age at First Parturition on Range Beef Cows

Pinney, Don O.; Stephens, D. F.; Pope, L. S.

doi:10.2527/jas1972.3461067x

Cited by 58 publications

(30 citation statements)

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“…Grass hay utilized in Oklahoma for beef cattle nutritional studies is composed largely of bluestem (little and big), with smaller amounts of switchgrass and indiangrass (Nelson et al, 1952;Pinney et al, 1972;Davis et al, 1977;Hughes et al, 1978a;Trautman, 1987;Gonzalez, 1987 andScott, 1988).…”

Section: Native Grass As a Forage Resourcementioning

confidence: 99%

“…As the forage matures, nutrient content and digestibility diminish so that supplementation may be necessary to maintain efficient forage utilization and cow performance (Waller et al, 1972;Furr and Nelson, 1964;Davis et al, 1977). Oklahoma's native range during the winter usually dictates supplementation if optimum beef cow performance is desired (Nelson et al, 1952;Pinney et al, 1972;Trautman, 1987).…”

Section: Supplementation Of Grazing Cattlementioning

confidence: 99%

“…But cows receiving the soybean hull supplement lost less body condition than cows fed the corn/cottonseed meal supplement during both winters. Pinney et al (1972) noted that as winter weight loss increased, gains the following summer increased and that these changes were directly related to winter feed level for cattle (< 5-year old) grazing native range. Lusby et al (1976b) noted that cows supplemented through the winter lost 10-15% of their fall weight but made compensatory gains the following summer.…”

Section: Performance Responses To Supplementationmentioning

confidence: 99%

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Intake and digestibility of low-quality native grass hay by beef cows supplemented with graded levels of soybean hulls2

Martin

Hibberd

1990

Journal of Animal Science

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Section: Native Grass As a Forage Resourcementioning

confidence: 99%

Section: Supplementation Of Grazing Cattlementioning

confidence: 99%

Section: Performance Responses To Supplementationmentioning

confidence: 99%

See 1 more Smart Citation

Intake and digestibility of low-quality native grass hay by beef cows supplemented with graded levels of soybean hulls2

Martin

Hibberd

1990

Journal of Animal Science

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“…A successfully planned development strategy for replacement heifers is crucial in order to obtain timely puberty (Arije and Wiltbank, 1971;Short and Bellows, 1971;Wiltbank et al, 1966), promote lifetime productivity and optimize milking ability (Pinney et al, 1972;Swanson, 1960). Grings et al (2007) concluded that heifers, when weaned at 140, 190, or 240 d of age, and subsequently developed on either constant or delayed gain management strategies can all achieve similar reproductive success.…”

Section: Introductionmentioning

confidence: 99%

Early weaning in Northern Great Plains beef cattle production systems: II. Development of replacement heifers weaned at 80 or 215d of age

et al. 2012

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a b s t r a c tStudies were conducted to evaluate effects of weaning and subsequent heifer development treatments within two herds located in the Northern Great Plains, USA. Heifer calves from predominantly Angus Â Hereford dams were stratified within dam age and calving date (Fort Keogh Livestock and Range Research Laboratory (LARRL), Miles City, MT, USA; n¼328) and randomly assigned within study and strata to one of three weaning treatments. Heifer calves from Angus and Angus Â Simmental dams (n¼167; Judith Gap (JG), MT, USA) were stratified within breed group by age, calving date, and AI sire. Heifer calves either remained with their dams until time of normal weaning (NW; approximately 213 d of age) or were early weaned (approximately 80 d of age) onto one of two early weaning (EW) diets. Heifer calves assigned to EW treatments received one of the following diets: (1) 17.5% CP (69% RDP and 7.53 MJ/kg NEm or (2) 17.5% CP (57% RDP and 7.69 MJ/kg NEm). At the time of normal weaning, heifers from LARRL (2005 and2006) were further divided into two heifer development (HD) diet treatments that differed only in proportion of RDP: (1) 12.5% CP (83% RDP and 6.28 MJ/kg NEm); or (2) 12.5% CP (72% RDP and 6.28 MJ/kg NEm). Heifers from JG were fed a common heifer development diet. Heifer BW at time of normal weaning revealed that EW heifers were heavier, regardless of type of protein delivered by EW treatments (Po0.10). Heifer BW at the end of the development period was greater for EW heifers at LARRL (Po0.01) and similar for JG heifers (P¼ 0.35) regardless of weaning treatment. Heifers at LARRL that received EW treatments had a greater percentage pubertal (Po0.06) from 39 to 2 d before breeding compared to NW heifers. Pregnancy rates were not influenced by early weaning or heifer development treatments at LARRL (P40.05); however, a greater percentage of EW heifers became pregnant throughout the breeding season at JG (P¼ 0.03). These experiments demonstrate early weaning is a viable option to develop and breed heifers in extensive beef production systems in the Northern Great Plains, USA. When production may be jeopardized by environmental conditions (e.g., drought), early weaning calves will not impair a heifers opportunity to be retained as replacement females as early weaned heifers have similar or greater reproductive success than heifers that are normal weaned.Published by Elsevier B.V.

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“…However, these results did not attract much attention until the 1980s when they were confirmed by other similar experiments. CR experiments have been carried out on yeast (Jiang, Jaruga and Repnevskaya, 2000), fruit flies (Bross, Rogina and Helfand, 2005;Mair, Goymer, Pletcher et al, 2003), nematodes (Houthoofd, Braeckman, Lenaerts et al, 2002;Lenaerts, van Eygen and van Fleteren, 2007;Yen and Mobbs, 2008), crustaceans (Ingle, Wood and Banta, 1937), spiders (Austad, 1989), rodents (Masoro, 2005;2009), dogs (Kealy, Lawler, Ballam et al, 2002), cattle (Pinney, Stephens and Pope, 1972), primates (Bodkin, Alexander, Ortmeyer et al, 2003;Colman, Anderson, Johnson et al, 2009;Colman, Beasley, Kemnitz et al, 2014;Mattison, Roth, Beasley et al, 2012), and occasionally even on humans (Bartke, 2012;Holloszy and Fontana, 2007;Longo and Fontana, 2009;Roth and Polotsky, 2012).…”

Section: Comparing Our Results With the Outcomes Of The Calorie Restrmentioning

confidence: 99%

Earlier and more rapid ageing: Does nutrition contribute?

Salinari¹,

Santis²

2015

IJPS

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This paper estimated three parameters related to demographic ageing, i.e., the acceleration in mortality rates as people get older. These parameters are: (i) the age when the process begins (onset), (ii) the rate of ageing in a (simple) Gompertz model and (iii) the rate of ageing in a (more elaborate) Gamma-Gompertz model. These three indicators were estimated on the basis of female cohorts born in seven European countries between 1890 and 1919. Our results indicated a progressively earlier onset and a steeper rise in the rate of ageing in recent cohorts, i.e., ageing seems to have accelerated over time. The reasons for these shifts are still unknown, but due to their similarity with the results of a vast body of experiments of calorie restriction on lab animals, we suggested here that the changed dietary regime of humans since the end of the 19th century may have played a part in the evolution of their mortality schedule.

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Lifetime Effects of Winter Supplemental Feed Level and Age at First Parturition on Range Beef Cows

Cited by 58 publications

References 0 publications

Intake and digestibility of low-quality native grass hay by beef cows supplemented with graded levels of soybean hulls2

Intake and digestibility of low-quality native grass hay by beef cows supplemented with graded levels of soybean hulls2

Early weaning in Northern Great Plains beef cattle production systems: II. Development of replacement heifers weaned at 80 or 215d of age

Earlier and more rapid ageing: Does nutrition contribute?

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