Effects of Fat-Soluble Vitamins on Growth Performance and Digestion and Metabolism of Dorper&times;Thin-Tailed Han Crossbred Sheep during Fattening Stage

ZHOU Lixue, MA Tao, CUI Kai, WANG Wenyi, YANG Dong, WANG Yunfei, CHEN Huaisen, CHEN Renwei, DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2019.03.024

2019 , Vol. 31 >Issue 3: 1188 - 1197

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.03.024

Molecular Nutrition

Effects of Fat-Soluble Vitamins on Growth Performance and Digestion and Metabolism of Dorper×Thin-Tailed Han Crossbred Sheep during Fattening Stage

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1. Key Laboratory of Feed Biotechnology of Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. College of Animal Science, Tarim University, Alar 843300, China;
3. Scientific Research Institute of Agricultural and Animal Husbandry in Bayanur, Bayanur 015000, China;
4. Inner Mongolia Fuchuan Feed Science and Technology Ltd., Co., Bayanur 015000, China

Received date: 2018-09-02

Online published: 2019-03-18

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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 digestibility, 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 replicates 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 vitamin 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 results 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 interactively 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 detergent 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.

Key words： fat-soluble vitamins; partial deduction; mutton sheep; growth performance; digestion

Cite this article

ZHOU Lixue, MA Tao, CUI Kai, WANG Wenyi, YANG Dong, WANG Yunfei, CHEN Huaisen, CHEN Renwei, DIAO Qiyu . Effects of Fat-Soluble Vitamins on Growth Performance and Digestion and Metabolism of Dorper×Thin-Tailed Han Crossbred Sheep during Fattening Stage[J]. Chinese Journal of Animal Nutrition, 2019 , 31(3) : 1188 -1197 . DOI: 10.3969/j.issn.1006-267x.2019.03.024

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