Effects of Dietary Concentrate Proportion of Ewes during Late Gestation on Growth Performance, Digestion Performance and Serum Antioxidant Capacity of Lambs

ZHANG Fan, CUI Kai, BI Yanliang, DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2017.10.019

2017 , Vol. 29 >Issue 10: 3583 - 3591

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.10.019

Molecular Nutrition

Effects of Dietary Concentrate Proportion of Ewes during Late Gestation on Growth Performance, Digestion Performance and Serum Antioxidant Capacity of Lambs

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Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Received date: 2017-04-04

Online published: 2017-09-28

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Abstract

This experiment aimed to study the effects of dietary concentrate proportion of ewes during late gestation on growth performance, digestion performance and serum antioxidant capacity of lambs. Sixty-six primiparous Hu ewes at 90 d of pregnancy with average body weight of (44.45±2.20) kg were randomly divided into 3 groups, each group had 11 replicates with 2 ewes per replicate. The concentrate proportion in diets for ewes in gestation in different groups was 50% (50% group), 40% (40% group) and 30% (30% group), respectively. After parturition, ewes were fed the same total mixed ration (TMR). At 10 days of age, one lamb of each ewe was selected, weaned maternal milk and fed a milk replacer. At 15 days of age, lambs were fed a starter. At 20 days of age, lambs were fed alfalfa hay until 60 days of age. Body weight of lambs was measured every 10 days. At 51 to 60 days of age, digestion and metabolism test was carried out. At 20 and 60 days of age, blood was collected and serum antioxidant indexes were determined. The results showed as follows:dietary concentrate proportion of ewes during late gestation had no significant effects on body weight of lambs at 1, 10, 20, 30, 40, 50 and 60 days of age, and body measurements and nutrient apparent digestibility at 20 and 60 days of age (P>0.05). With the decrease of maternal dietary concentrate proportion, serum total antioxidant capacity (T-AOC) and superoxide dismutase (SOD) activity of lambs at 20 days of age were significantly increased (P<0.01), and 50% group was significantly lower than the other two groups at 60 days of age (P<0.05 or P<0.01); serum glutathione peroxidase (GSH-Px) activity at 20 and 60 days of age in 30% group was also significantly higher than the other two groups (P<0.01); serum MDA content at 20 days of age was significantly decreased with the decrease of maternal dietary concentrate proportion (P<0.01), and 50% group was significantly higher than 30% group (P<0.05). It is concluded that concentrate proportion in diet for ewes at during late gestation has no significant effects on body weight, body measurements and nutrient apparent digestibility of early weaning lambs, while with the decrease of maternal dietary concentrate proportion, serum antioxidant capacity of lambs is increased.

Key words： pregnancy ewe; concentrate; early weaning; lamb; Hu sheep

Cite this article

ZHANG Fan, CUI Kai, BI Yanliang, DIAO Qiyu . Effects of Dietary Concentrate Proportion of Ewes during Late Gestation on Growth Performance, Digestion Performance and Serum Antioxidant Capacity of Lambs[J]. Chinese Journal of Animal Nutrition, 2017 , 29(10) : 3583 -3591 . DOI: 10.3969/j.issn.1006-267x.2017.10.019

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