Pettigrew J E, Cornelius S G, Moser R L, Heeg T R, Hanke H E, Miller K P, Hagen C D
J Anim Sci. 1986 Mar;62(3):601-12. doi: 10.2527/jas1986.623601x.
Piglets were provided supplemental energy as oral doses of corn oil to find whether such treatment might improve survival or weight gains. A total of 1,840 piglets from 182 litters was used. Piglets were allotted to dosed and control treatments within litter on the basis of body weight. Dosed piglets received a total of 8 ml of corn oil in four doses during the first 48 h postpartum. The survival rate to weaning was high and not affected (P greater than .10) by the corn oil doses. Deaths of piglets low in birth weight were delayed by the fat doses, suggesting some utilization. The fat doses did not affect piglet weight gain. Factors affecting preweaning survival and growth of piglets were also evaluated using data from the same piglets. Specific factors investigated were sex, parity of dam, birth weight, litter size and the mean and standard deviation of piglet birth weights within litters. Male piglets were heavier at birth than females, but there was no sex effect on weight at 7 d or at weaning. Small males were less likely to survive to 3 d than were small females. Litters from primiparous sows were smaller at birth and weaning, but had lower percentages of stillbirths and of preweaning deaths than did those from multiparous sows. Piglets from primiparous sows were more uniform in birth weight. Piglets that were heavier at birth grew faster and were more likely to survive. Litter size affected growth but not survival of piglets. A heavier average birth weight in the litter reduced slightly the growth rate of individual piglets. An increase in variability of piglet birth weight within a litter was associated with an increase of the percentages of stillbirths and of preweaning mortality. A few litters accounted for a major portion of the mortality. Much of the variation in piglet mortality and growth was not explained by factors considered.
给仔猪口服玉米油以补充能量，探究这种处理方式是否能提高仔猪存活率或促进体重增加。研究共使用了来自182窝的1840头仔猪。仔猪在窝内根据体重被分配到给药组和对照组。给药组仔猪在产后48小时内分四次共接受8毫升玉米油。断奶存活率很高，玉米油剂量对其没有影响（P大于0.10）。低出生体重仔猪的死亡因脂肪剂量而延迟，这表明脂肪有一定利用。脂肪剂量不影响仔猪体重增加。还利用同一批仔猪的数据评估了影响仔猪断奶前存活和生长的因素。所研究的具体因素包括性别、母猪胎次、出生体重、窝产仔数以及窝内仔猪出生体重的均值和标准差。雄性仔猪出生时比雌性仔猪重，但在7日龄或断奶时体重不存在性别效应。小体型雄性仔猪比小体型雌性仔猪存活至3日龄的可能性更低。初产母猪的窝产仔数在出生和断奶时较少，但死胎率和断奶前死亡率比经产母猪的低。初产母猪的仔猪出生体重更均匀。出生时较重的仔猪生长更快，存活可能性更大。窝产仔数影响仔猪生长，但不影响存活。窝内平均出生体重较高会略微降低个体仔猪的生长速度。窝内仔猪出生体重变异性增加与死胎率和断奶前死亡率增加相关。少数几窝占了死亡率的很大一部分。仔猪死亡率和生长的许多变异无法用所考虑的因素来解释。
