Cow Nutrition and Feeds

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Cow Nutrition and Feeds
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Primary consideration when feeding beef cows is

• Factors that determine the level of energy that
  needs to be fed
• 1. Physiological state
• 2. Size
• 3. Milk production
• 4. Weather

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Primary consideration when feeding beef cows is

• Physiological state
• Breed Maintenance Gestation
  Lactation
• of total annual requirement
• AHx 73.8 7.6 18.6
• Cx 74.8 7.4 17.8
• Jx 71.6 6.6 21.8
• Sx 74.9 6.3 18.7
• X 73.8 7.0 19.2

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Production characteristics of breed types
differing in mature size milk production
potential

• Breed Type
• AHx Cx Jx Sx
• Wt. Lb. 1131 1258 993 1187
• Calf birth wt. Lb. 91.4 97.7 83.4
  92.7
• Milk yield, Lb 2685 2682 3314 3448
• Ave. weaning wt. 507 538 518 553

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ME requirements fordifferent cow genotypes

• Breed Type
• AHx Cx Jx Sx
• Maintenance, Mcal/D 14.1 15.9 14.4 18.2
• Gestation Mcal/D 1.9 2.1 1.9 2.0
  
• 16.0 18.0 16.3 20.2
• Maintenance, Mcal/D 14.1 15.9 14.4 18.2
• Lactation, Mcal/D 8.0 8.7 9.8
  10.4 22.1 24.6 24.2 28.6

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Metabolizable Energy
Energy 1200 Lb Sx
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Metabolizable Energy
Energy 1100 Lb AHx
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Estimated milk production
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ME needs for different cow types when nursing

• Breed Cross
• AHx Cx Jx Sx
• Cow Wt. 1131 1256 993 1187
• Milk Yield/D 16.3 16.3 20.1 20.9
• Maintenance
• Rebreeding, Mcal/D 14.1 15.9 14.4 18.2
• Lactation, Mcal/D 8.0 8.7 9.7
  10.4
• Total, Mcal/D 22.1 24.6 24.2 28.6
• Alfalfa-brome hay, lbs 28.5 31.8 31.3
  36.9
• .87 Mcal/DM

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Analysis of ration for different cow types when
nursing calves

• Breed Cross
• AHx Cx Jx Sx
• Total Energy Mcal/D 22.1 24.6 24.2 28.6
  
• Maximum Dry 26 29 23 27 Matter
  Intake
• Energy Density .85 .85 1.05
  1.06 of Ration Mcal/lb.
• Hay or Pasture OK OK NO NO
• Hay / Corn Silage 36/64 50/50
• (9.3/36.8) (15.2/33.8)
• Corn / Hay 29/71 31/69
  (7.7/18.3) (9.6/20.9)

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ME needs for different cow types at peak
production

• Breed Cross
• AHx Cx Jx Sx
• Cow Wt. 1131 1256 993 1187
• Peak Milk Yield/D 19 22 24 26
• Maintenance 14.1 15.9 14.4 18.2
• Rebreeding, Mcal/D
• Lactation, Mcal/D 9.1 10.6 11.5
  12.5
• Total, Mcal/D 23.2 26.5 25.9 30.7
• Alfalfa-brome hay, lbs 30.0 34.2 33.4
  39.6
• .87 Mcal/DM

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Protein requirement 1100 Lb. cow
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Calcium Phosphorus requirement 1100 Lb. cow