Objectives
| Onset and end of the fattening period | Starts Day 90 → Choice between fattening or breeding Ends Day 180 | | --- | --- | | Initial and final BW | 30kg → 120kg | | Expected daily BW gain | DWG 800g | | Aim of feeding | • high feed intake • Quality meat product • highly daily gain • good feed efficieny | | Feeds and their protein and energy contents | CP varies depedning on weight. ◦ 30-50kg → 18% CP ◦ 50-80kg → 15.5 % CP ◦ 80-120kg → 13% CP • DE always 14.0 MJ/kg feed First limiting AA → LYS for 1g protein gain 0.12g LYS must e supplemented | | Physical forms of diets | Wet or dry (pelleted) diet. Pig can choose to add water | | Daily feed intake | Day 90 → 1 kg, Day 120 → 3-3.5 kg | | Feed efficiency | less than < 3.0 kg/kg | | Feeding technology | Ad libitum & phase feeding (saves money and food) +automatic feeders with indivudal programming capability | | Prevention of ulcer | Smaller size feed particles will INCREASE ulcer risk….
Larger size particles will allow more digestive enzyme to work • more fiber • Buffering material • Clay can be added for stomac lining • Vitamins A E K and Se |
At day 90 a decision of either breeding or fattening is made for the piglet based on several factors, one being BCS. At this stage the piglet BW is approx 30-35kg and optimal BCS is “3”. (1-5)
To check BCS back fat i measured at P2 level
Backfat should be 16mm at first check
and up to 20mm at farrowing.
Day 90-180 // 30kg -120kg
CP varies depedning on weight.
DE stays the same
Still fed ad libitum → avg weight gain of 800g and feed efficeicny of less than 3kg/kg food… this is 3 times worse than that of example broiler chickens who are 1kg to 1kg food.
Wet or dry pellets
tap water can increase appetite
Phase feeding:
Concept of phase feeding is to break down the growth of the pigs into phases and feed efficient amount according to nutrient needs of that phase.
ex. Starter-phase , grower phase etc
Minimizes risk of overfeeding (waste of money), and underfeeding (bad growth)
Overall it will reduce feed costs per pig.
Lysine is typically the first and most limiting AA in SU diets.
to gain 1g of protein 0.12g of lysine is needed.