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- Title
Varying dietary cation-anion difference in late gestation and in lactation on sow productivity.
- Authors
Roux, M. L.; Jardon, P. W.; Johnston, S. L.; Bidner, T. D.; Southern, L. L.
- Abstract
Primiparous or multiparous sows and their pigs were used to evaluate the effects of changing dietary cation-anion difference (DCAD; Na + K - Cl - S) in late gestation and in lactation on sow productivity. In a preliminary experiment (20 sows), urinary pH was linearly decreased (P < 0.001) as DCAD decreased in the diet (DCAD; 140, 99, 75, and 45 mEq/kg). Reducing DCAD tended to linearly increase (P = 0.15) plasma Ca concentrations. Thus, in Exp. 2, 66 sows (33 per treatment) were used and the dietary treatments consisted of corn-soybean meal diets with DCAD of 140 or 45 mEq/kg. These DCAD's were achieved by 0 or 3.5% added SoyChlor 16-7. The diets were fed from d 111 of gestation to weaning. Sows were allotted based on parity and the date of d 111 of gestation. Reducing DCAD reduced ADfifrom d 111 of gestation to d 1 postfarrowing (P < 0.02), but ADfiwas not affected by DCAD during lactation or overall (P > 0.10). Sow weight change was not affected by DCAD (P > 0.10). Reducing DCAD did not affect total number pigs born, pigs born alive, stillbirths, mummies, number nursed, number weaned, percent survivability, live and total birth weights, initial litter weight adjusted for mortality and cross-fostering, final litter weight, or litter weight gain (P > 0.10). Decreasing DCAD in the diet decreased urinary pH (P < 0.001) but had no effect on plasma Ca concentration. Twenty-seven sows fed the control diet and 21 sows fed the reduced DCAD diet were evaluated during their subsequent farrowing. Sows that had been fed the reduced DCAD diet had increased total number of pigs born (P < 0.08) and pigs born alive (P < 0.02) in the subsequent farrowing. Stillbirths, mummies, and live and total birth weights were not affected in the subsequent farrowing by DCAD. Changing DCAD had little affect on sow and litter response variables, but it decreased urine pH (P < 0.001) and increased total number of pigs born and pigs born alive in the subsequent farrowing.
- Subjects
ANIMAL litters; PREGNANCY in animals; SOWS; LACTATION; PREGNANCY; BIRTH weight; CHILDBIRTH
- Publication
Journal of Animal Science, 2006, Vol 84, p395
- ISSN
0021-8812
- Publication type
Article