Acta Vet. Brno 2007, 76: 585-593
Impact of Crude Protein Intake in Last 14 Days of Pregnancy on Puerperium, Piglet Loss Prior to Weaning and Subsequent Reproduction of Sows
The impact of feed containing 13%, 15%, 18% and 21% of crude protein fed to groups of sows (marked A, B, C and D) from Day 100 of pregnancy until farrowing on puerperium, piglet loss prior weaning, fat depot differences, onset of reproductive activities after weaning, subsequent mating and the progesterone concentrations were studied. in groups A and B there were no puerperium disorders. Piglet loss before weaning reached 16.12 and 18.04% of all born piglets, 90% of sows became pregnant after the 1st insemination. in groups C and D the overall loss of all born piglets before weaning was 24.86 and 28.91%. The differences to groups A and B were significant (p < 0.05). Significant differences (p < 0.05) were found between groups A, B and C, D in number of animals exceeding body temperature of 39.6 °C. Puerperium disorders and MMA syndrome were detected in 50% of the sows in group C and 80% in group D. The conception rate after the 1st insemination was 80% (group C) and 60% (group D). reduction in the back fat thickness was at the boundary of statistical significance (p < 0.1) in groups C and D as compared to groups A and B. There was no difference in the onset of heat after weaning between the groups. in progesterone concentrations, significant differences (p < 0.05) were found between groups A and D on Day 14 after weaning. We demonstrated a negative impact of high crude protein intake in last 14 days of pregnancy in sows on puerperium and piglet loss prior to weaning.
Keywords
pig, Nutrition, body temperature, MMA syndrome, weaning, conception, progesterone.
