Effects of Dietary Protein Levels during Lactation to First-Litter Sows Fed a Fortified Corn Gestation Diet

Dc, Mahan; Ap, Grifo

doi:10.2527/jas1975.4151362x

Cited by 20 publications

(9 citation statements)

References 10 publications

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“…It has been clearly demonstrated that fortified, corn-based gestation diets resulted in decreased postpartum performance even though lactation diets met or exceeded NRC (1979) requirements (Rippel et al, 1965;Baker et al, 1970a,b;Hawton and Meade, 1971;Hesby et al, 1972;Mahan, 1977). Mahan and Grifo (1975) observed a linear increase in pig weight gain with increasing dietary lactation protein levels from 12 to 18% when the dam had received a vitamin-and mineral-fortified corn diet during gestation. Mahan and Mangan (1975) have further demonstrated an interactive effect on progeny performance in gilts fed either 9, 13 or 17% protein diets during gestation and 12 or 18% protein diets during lactation.…”

Section: Resultsmentioning

confidence: 99%

Effect of Level of Protein and Supplemental Choline on Reproductive Performance of Gilts Fed Sorghum Diets

Maxwell

Johnson

Luce

1987

Journal of Animal Science

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A total of 214 gilts was used (two trials) to determine the effect of protein level and choline supplementation during gestation on weight gain, conception rate and subsequent reproductive performance. The gihs were fed either a 12 or 16% crude protein sorghum-soybean meal diet containing either a high supplemental choline level or no supplemental choline in a 2 • 2 factorial arrangement of treatments Conception rate was not influenced by either protein or choline level. Choline ~pplementation increased pig weight at 42 d of age (P<.14) and litter weight at 21 (P<.12) and 42 d (P<.I). Gilts fed the 16% protein diet produced larger pigs at 42 d (P<.13) and heavier litters at birth, (P<.l) 21 d (P<.14) and 42 d (P<.05) than gilts fed the 12% protein diet. A larger choline effect on litter size and pig and litter weight was observed for gihs fed the 12% protein diet than for those fed the 16% gestation diet, although the protein-choline interaction was not significant for any traits measured. The incidence of spraddle leg condition was low and was not affected by level of dietary protein or ~applemental choline.

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Section: Resultsmentioning

confidence: 99%

Effect of Level of Protein and Supplemental Choline on Reproductive Performance of Gilts Fed Sorghum Diets

Maxwell

Johnson

Luce

1987

Journal of Animal Science

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“…It seems likely that when energy intake is insufficient, protein is catabolized to meet energy needs and this may result in a secondary protein deficiency. Previous research has demonstrated that protein deficiency during lactation results in increased sow weight loss (DeGeeter et al, 1972;Mahan and Grifo, 1975), reduced pig weights at weaning (Holden et al, 1968) and delayed return to estrus postweaning in primiparous sows (O'Grady and Hanrahan, 1975).…”

Section: Resultsmentioning

confidence: 99%

Effect of Dietary Energy Intake during Lactation on Performance of Primiparous Sows and their Litters

Nelssen

Lewis

Peo

et al. 1985

Journal of Animal Science

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A total of 146 primiparous sows was used in four replications of an experiment to investigate the effect of energy intake during a 28-d lactation on sow and litter performance. Dietary treatments consisted of three energy intakes; 10, 12 or 14 Meal of metabolizable energy (ME) 9 sow-1. d -t. All sows were fed equal amounts of crude protein, vitamins and minerals daily, which met or exceeded standard recommendations. The experiment was initiated at parturition. Sow weight and backfat loss during lactation decreased linearly (P<.O01) as energy intake increased. There were no differences in litter size at either 14 d of lactation or weaning. Pig weights on d 14 increased linearly (P<.05) and litter weights tended to increase linearly (P=.13) as energy intake increased. At weaning, pig weights and litter weights increased (P<.05) as sow energy intake increased. There were no significant differences in the percentages of sows in estrus by 7, 14, 21 and 70 d postweaning, but sows fed 10 Meal ME/d had a slightly longer interval from weaning to first estrus than sows fed higher energy intakes. Serum urea concentrations of sows were inversely related to energy intake during lactation. Serum creatinine concentrations were not affected by energy intake. An intake of 10 Meal ME/d by primiparous sows during a 28-d lactation resulted in reduced sow and litter performance; there was little difference between sows fed 12 and 14 Meal ME/d.

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“…Although a fortified corn diet has been found to be limiting in lysine and tryptophan during pregnancy (AUee and Baker, 1970), gravid swine fed such a restrictive regimen will respond to greater concentrations of dietary protein during lactation (Mahan and Grifo, 1975). Baker et al (1970aBaker et al ( , 1974 demonstrated an increased protein need during the last trimester, when fetal tissue has its greatest development, with improved lactation performance.…”

Section: Introductionmentioning

confidence: 99%

Effects of Dietary Protein Levels during Lactation to First-Litter Sows Fed a Fortified Corn Gestation Diet

Cited by 20 publications

References 10 publications

Effect of Level of Protein and Supplemental Choline on Reproductive Performance of Gilts Fed Sorghum Diets

Effect of Level of Protein and Supplemental Choline on Reproductive Performance of Gilts Fed Sorghum Diets

Effect of Dietary Energy Intake during Lactation on Performance of Primiparous Sows and their Litters

Effect of Feeding Various Gestation and Lactation Dietary Protein Sequences on Long-Term Reproductive Performance in Swine

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