Transcript Powerpoint on Animal Requirements

Animal Requirements
Requirements
• Tables should be thought of as a guide
• Minimum requirement for an
“average” animal
• Many factors affect requirements
What Affects Requirements?
• Species
• Breed
• Weight
• Body condition
• Age
• Sex
• Growth
• Stage of gestation
• Milk production
• Physical activity
• Environment
• Others (disease,
stress)
Requirements
• Tables don’t include:
• Breed
• Genetic potential
• Body condition
• Environment, stress, disease,
parasites
• Feed additives, etc.
Requirements
• By understanding these other factors
• Can make adjustments
• Month of cold weather
• Moving to a hilly pasture
• Excess body condition
Requirements
• Have four major components:
• Maintenance
• Reproduction
• Lactation
• Growth
Maintenance
• No productive functions
• Breath, move, digest, keep warm, etc.
• Weight
Maintenance
• What livestock animal is truly at
maintenance?
• Mature gelding, no activity
• Mature ewe, after weaning
Maintenance
Reproduction
• Stage of gestation – last third
• Expected birth weight, number
• Includes development of maternal
tissue and fetus
• Fetus has priority over maternal
• Body reserves may be depleted
• Deficiencies affect fertility, puberty
Reproduction
Lactation
• Greatest nutrient demands
• Amount of milk
Lactation
Growth
• Actual weight
• ADG (growth rate)
• Mature weight
Growth
Tables
• DM intake is not a requirement
• Used as a guideline
• Requirements both as:
• Concentration
• Amount per day ***