The effects of level of feeding of sows during pregnancy. I. Reproductive performance

摘要: 1. Twelve sets of 3 litter-sister Large White gilts were mated at first oestrus after reaching 250 lb. live-weight and given daily during successive pregnancies either 6 (A), (B) or for 76 days then until parturition (C) the same meal mixture. During an 8-week lactation all 4 plus 0·8 per piglet suckled. 2. There was a significant linear increase in numbers born with parities (P 3. Post-natal litter performance poor groups, probably because presence E. coli , but there no evidence treatment effects other than on 3-week weight third litters, which significantly greater Group C A B