Feeding and nutrition of replacement gilts Flashcards
What are the 3 (4?) stages of sows nutrition
- Replacement gilt- the focus if this topic- focus on fat inbuilding to prevent the thin sow syndrome
- Gestating sow
- Lactating sow
- Empty sow
Replacement gilts timeline
- First preselection: at 90 days and 25-30kg
- Second preselection: at 140 days and 80-90kg
- Reach puberty at 170 days and are insem after their 2nd heat
Nutrition of the replacement gilts throughout the timeline
Diet remains the same throughout
DE: 14.2
CP%: 13.5
5 Grades of the BCS
- Emaciated: hips and backbone prominent
- Thin: hips and backbones easily felt without applying palm pressure
- Ideal: hips and backbones felt with FIRM palm pressure
- Fat: hips and backbone cannot be felt
- Overfat: Hips and backbone heavily covered
Rationing of High Lean gilts
Phase, bwkg, backfat in mm, feeding strategy (kg/day)
- 25-60kg <7mm, ad lib
- 60-125kg, 7-16mm, 1.8-2.2kg
- 125-140kg, 16-18mm, ad lib
- Early gestation, 18-20mm, 1.8-2.0kg
What are the types and feeding strategies of gilts
- Genetically lean animals:
- High muscle synth from protein- but we want fat not muscle
- Feed fat for E reserves- aim for 16-20mm backfat
- Industrial average:
- Synth high fat and low protein, therefore feed them more protein
- Because they are predisposed for fat building- lower back fat is saught after
Nutrient requirements of High lean gilts
Industry average vs lean
DE: 13 vs 14
CP: 14-16 vs 13-14
Timeline: age and weights
Day 90: 25-30kg
Day 140: 80-90kg
Day 190: 110kg
Day 210: 140kg
Timeline: Feeding strategy acc to weight
- 25-60kg: ad lib
- 60-125kg: 1.8-2.2kg a day
- 125-140kg: ad lib and flushing of 3.5kg/day
What is flushing?
Giving a high quantity of feed (3.5kg) ad lib for 11-14 days before insem
Aime to incr ovulation rate and litter size
If sows condition is poor, no flush needed 7 days after- wait anothre period to inseminate (3rd heat)
