Feeding and nutrition of pregnant sows

Question 1

The nutritional life cycle

Answer 1

Occurs at 200-220 days

Question 2

Talk about the 3 (4) stages of sows nutrition

Answer 2

1. Replacement gilt
2. Gestating sow (this topic)
3. Lactating sow
4. Empty sow

Question 3

Summary of the differences vtw sows at insem and at partuition

Answer 3

Age vs BWkg vs back fat thickness mm

at insem: 200-200 days, 135kg, 16-18mm

at partuition: 315 days, 180kg, 18-20mm

Question 4

Gestation period

Answer 4

114 days: 3 mnths 3 wks 3 days

Question 5

First insem

Answer 5

at 210 days (200-220)

at 140kg (135-150)

Question 6

Weight at partuition

Answer 6

occurs on day 315 around 180-185kg

Question 7

Timeline for feeding: what are the days and the events

Answer 7

• Day 0: insem, should be 135kg (135-150)
• Day 4
• Day 30: back fat should be >18mm
• Day 90
• Day 112
• Day 113
• Day 114: farrowing at around 180kg

Question 8

Timeline and feeding: the 6 stages of feeding

Answer 8

• Day 0-4: 1.8-2.3kg/day
• Day 4-30: feed acc to BCS
• Day 30-90: 1.8-2.3kg/day
• Day 90-112: 2.7-3.6kg/day to prevent ketosis
• Day 112-113: 2.3-3kg/day and add laxative to prevent obstipation e.g MgSO4
• Day 113-114: 1.0-1.8kg/day LIQUID

Question 9

2 points to mention about gestating sows

Answer 9

Occur at different ages (weight acc to age)

Heat is v. bad for the zygote, 30-40% of piglet loss is due to zygote resorption

Question 10

Goals of sows nutrition (5)

Answer 10

1. Help egg prod and ovulation
2. Incr the number of live piglets
3. Incr the number of weaned piglets
4. Incr the weaning weight
5. Ensure good result of next pregnancy

Question 11

Nutrient composition of pregnant sows

Answer 11

• DE: 14.2
• CP%: 13.5
• Lysine: 0.6
• CF%: 10

*CP and DE is the same for replacement gilts*