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Related Experiment Videos

Forage intake by lactating beef cows differing in potential for milk production.

P G Hatfield1, D C Clanton, K M Eskridge

  • 1University of Nebraska, North Platte 69101.

Journal of Animal Science
|November 1, 1989
PubMed
Summary

Beef cows with higher milk production levels consumed more forage (dry matter intake). Calf growth showed a positive relationship with milk production, but forage intake was not directly linked to milk yield.

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Area of Science:

  • Animal Science
  • Ruminant Nutrition
  • Beef Cattle Production

Background:

  • Milk production potential varies among beef breeds.
  • Understanding forage intake in relation to milk yield is crucial for optimizing beef cow nutrition and calf performance.

Purpose of the Study:

  • To quantify ad libitum forage intake in beef cows across different milk production levels.
  • To determine the relationship between milk production, cow dry matter intake (DMI), and calf performance metrics.

Main Methods:

  • Two feeding trials (early and late lactation) were conducted with 24 cow-calf units from three breed groups representing low, medium, and high milk production.
  • Cows had ad libitum access to chopped native Sandhills meadow hay.
  • Dry matter intake (DMI), cow and calf body weight (BW), and calf milk consumption were measured.

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Main Results:

  • Daily DMI and calf milk consumption increased linearly with milk production levels (P < .05).
  • Cow DMI, when expressed per unit of body weight, showed both linear (P < .05) and quadratic (P < .01) responses to milk production levels.
  • Calf growth parameters (birth weight, adjusted weaning weights) showed no significant linear or quadratic relationship with milk production levels (P > .10), although June 1 calf weight, weaning weight, and rate of gain exhibited a positive linear trend (P < .07).

Conclusions:

  • Higher milk production in beef cows is associated with increased forage DMI.
  • While calf growth shows a positive trend with milk production, direct forage intake by calves was not significantly influenced by milk production levels.
  • Regression models effectively predicted DMI based on production level, cow BW, calf birth weight, and weaning weight.