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Information Journal Paper

Title

Increasing the yield of weaned lamb crop using vitamin E in flushing diet of Lori-Bakhtiari ewes

Pages

  15-25

Abstract

 Introduction: Supplementation of Vitamin E has shown to prevent disease and improve overall health and productive Performance of farm animals (Liu et al. 2014). Moreover, Vitamin E plays an important role in the reproductive Performance of the animals (Liu et al. 2014). The Vitamin E requirement may be defined as the amount required preventing peroxidation in the particular subcellular membrane which is most susceptible to peroxidation (Koyunku and Yerlikaya 2007). Little is known about the effects of Vitamin E supplementation on specific reproductive events in sheep and goat. Most nutritionists assume that reproductive Performance will not be limited when domestic animals are fed diets that meet the NRC levels. Fertilization in animals is an all or none phenomenon hence none or all ovulated eggs are fertilized. In general, three major variables of ovulation rates, embryonic survival and foetal survival rate contribute to the litter size (Koyunku and Yerlikaya 2007). The present experiment has been conducted in the two flocks with a history of relatively moderate fertility (90%) to examine the effect of Vitamin E supplementation on the number and total weight of lambs weaned. Material and methods: The experiment was conducted using 200 Lori-Bakhtiarii Ewes (100 Ewes per flock), with an average live body weight of 57. 5± 6. 7 kg and 2-7 years of age. The Ewes in each flock were randomly divided into two groups, consisting of 50 Ewes per group. Each group of Ewes assigned to consume one of the two diets. Diets contained basal diet plus 250 gram per Ewe barley grains (control) or basal diet plus 250 gram per Ewe barley grains supplemented with Vitamin E (500 IU). The basal diet was based on local feeds and pasture herbage ad libitum and the salt stone as free. The experiment started with the natural mating period in late summer. The 3 weeks feeding regimens started 2 weeks before ram introduction. The Ewes from all groups were kept in the same shed and consisted as one flock while grazing. Ewes were placed in individual pens once daily to receive supplemental treatments. Ewes remained in individual pens until all trial supplements had been consumed. Ewes in each flock were mated to 10 fertile Lori-Bakhtiari rams during the breeding seasons of 34 days in late summer and early autumn. Weight and body condition score of Ewes at mating were measured. Body condition scoring (BCS=1 for emaciated Ewes to BCS=5 for obese Ewes at 0. 5 interval) has been described by Russel et al. (1969). The body condition score of the Ewes in this method was based on touching of the tips of both the spinous and the transverse processes of the vertebrae, and the fullness of fat and muscle cover over and around the vertebrae in the loin region. The animals were kept indoors from December to May and lambed indoors. Date of lambing, the number of lambs born, lambs birth weight, survival rate of lambs from birth to weaning and lambs weaning weight were recorded. Some combination traits as total lamb birth weight and total lamb weaning weight per exposed Ewe were calculated. Data were analyzed using General Linear Models (GLM) procedure of SAS. Result and discussion: There were not any significance difference among the flocks and treatments on the Ewe's body weight and body condition score of Ewes at mating. Difference between control and Vitamin E treatments with respect to the number of lambs born per Ewe exposed to the rams was tended to be significant (P=0. 06). The number of lambs born per Ewe exposed to the rams was not affected by flock, and body condition score of Ewes at mating. Yearling Ewes produced fEwer lambs than older Ewes but differences were not statistically significant. Mean of birth weight of lambs were not statistically differing between flocks, treatments, Ewes body condition scores and Ewes parity. Total birth weight of lambs per Ewe exposed to the rams and per Ewe lambing was different between treatments (P<0. 01) and higher in Vitamin E treatment group. Total birth weight of lambs per Ewe exposed to the rams was not affected by flock or Ewe parity but, total birth weight of lambs per Ewe lambing was differing between flocks (P<0. 01). Effects of body condition score on the total birth weight of lambs per Ewe exposed to the rams and per Ewe lambing were statistically significance (P<0. 05). The number of weaned lambs (P<0. 01), total lambs weaned weight per Ewe exposed to the rams (P<0. 01) and total lambs weaned weight per Ewe lambing (P<0. 05) were higher in Vitamin E treatment than control group. There were not any significant differences among different flocks and different Ewe parity on the number of lamb's weaned and total lambs weaning weight per Ewe exposed to the rams and per Ewe lambing. Body condition scores was influenced the number of lambs weaned and total lambs weaning weight per Ewe exposed to the rams (P<0. 05). Conclusion: Data obtained in this study indicated that in the Lori-Bakhtiatri sheep, using supplemental Vitamin E in the diet of Ewes given before mating significantly increased the number of weaned lambs and total weight of weaning lambs per Ewe exposed to the rams. These findings could further be used in exploring the frequency and amount of Vitamin E supplementation for the improvement of Ewes’ reproductive Performance.

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    APA: Copy

    BAGHERI, M.. (2021). Increasing the yield of weaned lamb crop using vitamin E in flushing diet of Lori-Bakhtiari ewes. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ), 30(4 ), 15-25. SID. https://sid.ir/paper/961256/en

    Vancouver: Copy

    BAGHERI M.. Increasing the yield of weaned lamb crop using vitamin E in flushing diet of Lori-Bakhtiari ewes. ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ)[Internet]. 2021;30(4 ):15-25. Available from: https://sid.ir/paper/961256/en

    IEEE: Copy

    M. BAGHERI, “Increasing the yield of weaned lamb crop using vitamin E in flushing diet of Lori-Bakhtiari ewes,” ANIMAL SCIENCE RESEARCHES (FACULTY OF AGRICULTURE, UNIVERSITY OF TABRIZ), vol. 30, no. 4 , pp. 15–25, 2021, [Online]. Available: https://sid.ir/paper/961256/en

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