动物营养学报2019，Vol.31Issue(3)：1188-1197,10.DOI:10.3969/j.issn.1006-267x.2019.03.024
脂溶性维生素对杜寒杂交肉羊育肥阶段生长性能和消化代谢的影响
Effects of Fat-Soluble Vitamins on Growth Performance and Digestion and Metabolism of Dorper×Thin-Tailed Han Crossbred Sheep during Fattening Stage
摘要
Abstract
The purpose of this experiment was to investigate the effect of partial deduction or excess amount of fat-soluble vitamins ( vitamin A, vitamin D and vitamin E) on growth performance, nutrient apparent digesti-bility, nitrogen and energy metabolism of Dorper×thin-tailed Han crossbred sheep during fattening period, with an aim to provide theoretical basis for the establishment of fat-soluble vitamin requirements of sheep in China. A total of 120 Dorper×thin-tailed Han crossbred sheep ( half male and half female) with average body weight of (26.0±0.11) kg after weaning at 90 days of age were used in the current study according to a single factor experimental design. All sheep were randomly divided into 5 groups according to their body weight with 12 rep-licates per group and 2 sheep per replicate ( half male and half female) . The control group ( PC group) fed a basal diet with no deduction vitamins; 30% of vitamin A ( PC-VA group) , vitamin D ( PC-VD group) and vi-tamin E ( PC-VE group) were deducted from PC group in the experimental groups, respectively; a high-dose group ( PC-7.5 group) was set up which all fat-soluble vitamins were 7.5 times higher than that of the control group. The pre-experimental period lasted for 10 days, and the experimental period lasted for 90 days. The re-sults showed that during days 60 to 90 of the experiment, the dry matter intake ( DMI) and average daily gain ( ADG) of rams in PC-VE group were the lowest, and significantly lower than those in other groups ( P<0.05) ; the ADG of ewes in PC-7. 5 group was the lowest, and significantly lower than that in other groups (P<0.05) ; and the feed conversion ratio ( FCR) of ewes in PC-7.5 group was the highest, and significantly higher than that in other groups ( P<0.05) . Partial deduction of vitamin E and experimental period interactively affected DMI and ADG or rams ( P<0.05) ; excess amount of fat-soluble vitamins and experimental period in-teractively affected ADG and FCR of ewes ( P<0.05) ; excess amount of fat-soluble vitamins and experimental period interactively affected the apparent digestibility of dry matter, organic matter, crude protein and acid de-tergent fiber of sheep ( P<0.05) . The results suggeste that long-term deduction of 30% of vitamin E or excess amount of fat-soluble vitamins can reduce the weight gain and nutrient digestibility of Dorper×thin-tailed Han crossbred sheep, and negatively affect the growth performance of sheep. [ Chinese Journal of Animal Nutri-tion, 2019, 31(3) :1188-1197]关键词
脂溶性维生素/部分扣除/肉羊/生长性能/消化Key words
fat-soluble vitamins/partial deduction/mutton sheep/growth performance/digestion分类
农业科技引用本文复制引用
周丽雪,马涛,崔凯,王文义,杨东,王韵斐,陈怀森,陈仁伟,刁其玉..脂溶性维生素对杜寒杂交肉羊育肥阶段生长性能和消化代谢的影响[J].动物营养学报,2019,31(3):1188-1197,10.基金项目
现代农业产业技术体系建设专项(CARS-38) （CARS-38）
内蒙古自治区科技重大专项 （）
