Effects of feeding energy or protein supplements before or after calving on performance of spring-calving cows grazing native range.

@article{Marston1995EffectsOF,
  title={Effects of feeding energy or protein supplements before or after calving on performance of spring-calving cows grazing native range.},
  author={T. T. Marston and Keith S. Lusby and Robert P. Wettemann and H. T. Purvis},
  journal={Journal of animal science},
  year={1995},
  volume={73 3},
  pages={
          657-64
        }
}
In three consecutive years, spring-calving Hereford and Hereford x Angus cows (n = 348) were used to determine effects of level of supplemental energy or protein before and after calving on cowherd performance. Beginning on November 1, cows were individually fed 1.22 kg/d of a 40% CP (PROTEIN) or 2.44 kg/d of a 20% CP supplement (ENERGY) until calving. After calving, cows remained on the same supplement, were switched to the other supplement, or were fed 2.44 kg/d of a 40% CP supplement (HI… 
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64 Citations
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Methods Citations
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Results Citations
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64 Citations

INFLUENCE OF POST-CALVING SUPPLEMENTAL PROTEIN ON CALF PERFORMANCE AND REPRODUCTIVE EFFICIENCY FOR BEEF COWS FED SILAGE

Calf gains and weights at turnout and weaning showed a quadratic response to protein supplementation, and there was a trend toward a linear decline in days to first service with increasing levels of CGM.

The effects of protein supplementation of fall calving beef cows on pre- and postpartum plasma insulin, glucose and IGF-I, and postnatal growth and plasma insulin and IGF-I of calves.

Increasing protein supplementation of fall calving beef cows from November to March, during breeding and early pregnancy, reduced BW loss of cows, decreased the interval from calving to pregnancy, increased plasma concentrations of insulin in December, January, and March, and increased plasma insulin-like growth factor-I in December without alteration in pregnancy rate.

First limiting nutrient for summer calving cows grazing autumn-winter range.

It is concluded that DIP was the first limiting nutrient for summer calving cows during the breeding season and during autumn-winter lactation after the breedingSeason.

Effects of body condition score at parturition and postpartum protein supplementation on estrous behavior and size of the dominant follicle in beef cows.

Cows should be managed to calve in moderate BCS and maintain BW after parturition to decrease the interval to first estrus, increase follicular development, and maximize pregnancy rate.

Effect of short period feed supplementation during early lactation on performance of cows and calves raised in extensive system

Beef cow with moderate body condition score can gain weight during the lactation period as a response to increase of energy availability in a short period without any influence on milk production and composition as well as a consequence on calf performance.

Prepartum supplement level and age at weaning: I. Effects on pre- and postpartum beef cow performance and calf performance through weaning.

There was no interaction between level of supplement during late gestation and age at weaning on cow BW, BCS, milk production, AI conception, and overall pregnancy rate in mature beef cows nor in their steer progeny's BW or ultrasound marbling.

Prepartum dietary energy source fed to beef cows: II. Effects on progeny postnatal growth, glucose tolerance, and carcass composition.

It is suggested that increasing the number of days on a corn-based finishing diet increases insulin resistance in beef cattle and indicates that prepartum maternal dietary energy source can alter fetal adipose tissue development and insulin sensitivity resulting in long-term effects on progeny's intramuscular fat deposition.

Influence of body condition at calving and postpartum nutrition on endocrine function and reproductive performance of primiparous beef cows.

Concentrations of IGF-I and leptin in plasma were constant during 7 wk before the first estrus, indicating that acute changes in these hormones are not associated with the resumption of ovarian function in primiparous beef cows.

Performance and metabolic status of grazing beef heifers receiving increasing protein supplementation pre- and postpartum

Supply of up to 1.2 kg/day of protein supplement for grazing beef heifers optimises forage intake and average daily gain before calving, and improves the indicators of the protein status.

Effect of dietary energy on milk production and metabolic hormones in thin, primiparous beef heifers.

A greater proportion of net energy is partitioned to maternal tissue realimentation when cows receive high compared to low-, maintenance-, or moderate-energy diets.
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