Effects of Dietary Supplementation of Conjugated Linoleic Acid (CLA) on Piglets' Growth and Reproductive Performance in Sows
Effects of Dietary Supplementation of Conjugated Linoleic Acid (CLA) on Piglets' Growth and Reproductive Performance in Sows
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DOI：
10.5713/ajas.2005.249
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发表时间：
2005-04
期刊：
影响因子：
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通讯作者：
J. C. Park;Younghoon Kim;H. Jung;H. Moon;O. Kwon;B. D. Lee
中科院分区：
文献类型：
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作者：
J. C. Park;Younghoon Kim;H. Jung;H. Moon;O. Kwon;B. D. Lee
本试验旨在研究日粮中共轭亚油酸水平和饲喂时间对母猪繁殖性能和仔猪生长速度的影响。牛脂（妊娠期日粮中3%，哺乳期日粮中5%）作为脂肪源掺入对照日粮中，（妊娠期日粮CLA水平为0.75%，哺乳期日粮CLA水平为1.50%）或100%用含有50%CLA异构体的市售CLA制剂代替牛脂（妊娠期饮食中的CLA水平为1.50%，哺乳期饮食中的CLA水平为2.50%）。从交配前第15天至断奶或交配后第74天至断奶饲喂含CLA的饲料。日粮共轭亚油酸水平和饲养时间不影响产仔数。高CLA水平日粮降低仔猪初生重（p<0.01），并有降低断奶母猪背膘厚的趋势。长期饲喂含CLA的日粮可显著降低仔猪断奶重（p<0.05）和母猪断奶背膘厚（p<0.05）。在母猪日粮中添加共轭亚油酸分别在妊娠期和哺乳期转移到胎儿和仔猪。仔猪出生时股肌中CLA含量为2.08 ~ 2.57mg/g脂肪，10日龄时为2.36 ~ 4.47mg/g脂肪，对照组未检测到CLA。因此，日粮中添加共轭亚油酸可降低母猪背膘厚和仔猪初生重及断奶重，但对总产仔数无影响。在产前和产后期间，膳食CLA分别通过胎盘和乳汁有效地转移。（Asian-Aust）J. Anim。Sci. 2005.（卷18，No. 2：249-254）
The objective of this study was to investigate effects of dietary level of CLA and the duration of feeding CLA- containing diets on reproductive performance in sows and piglet growth rate. Tallow (3% in gestation diet and 5% in lactation diet, respectively) was incorporated as a fat source in control diet, and each 50% (dietary CLA level of 0.75% in gestation diet, and 1.50% in lactation diet, respectively) or 100% (dietary CLA level of 1.50% in gestation diet, and 2.50% in lactation diet, respectively) of tallow was replaced by a commercial CLA preparation containing 50% CLA isomers. Diets containing CLA were fed either from d 15 pre- mating to weaning or d 74 post-mating to weaning. The level of dietary CLA and feeding duration did not affect litter size. High dietary level of CLA, however, decreased piglet weights at birth (p<0.01) and tended to decrease backfat thickness of sows at weaning. Long- term feeding of CLA-containing diets decreased piglet weights at weaning (p<0.05) and backfat thickness of sows at weaning (p<0.05). CLA supplemented in sow diet was transferred to fetus and piglets during pregnancy and nursing period, respectively. CLA contents of femoral muscle of piglets were 2.08 to 2.57 mg per g of fat at birth, and 2.36 to 4.47 mg at 10 days of age in CLA groups, while CLA was not detected in the control group. In conclusion, dietary supplementation of CLA tended to lower backfat thickness of sow and piglets' weight at birth or weaning, but did not affect total litter size. Dietary CLA was transferred efficiently during prenatal and postnatal periods of time through the placenta and milk, respectively. (Asian-Aust. J. Anim. Sci. 2005. Vol 18, No. 2 : 249-254)