Molecular Nutrition

Effects of Maternal Dietary Nutrient Level in Late Gestation on Growth Performance, Organ Development and Serum Antioxidant Capacity of Postpartum 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: 2016-08-01

  Online published: 2017-02-17

Abstract

Under the same dry matter intake condition, concentrate supplement to forage grass ratio was changed to change dietary nutrient level of ewes in late gestation, this study aimed to investigate the effects on growth performance, organ development and serum antioxidant capacity of postpartum lambs. Sixty-six healthy primiparous Hu ewes at 90 days of gestation with similar age[(11.0±1.0) months of age] and body weight[(44.43±2.20) kg] were randomly divided into 3 groups with 22 ewes per group. Concentrate supplement and forage grass were offered to ewes at ratios of 5:5 (5:5 group), 4:6 (4:6 group) and 3:7 (3:7 group) until parturition. After parturition, ewes were fed the same total mixed ration ad libitum. Lambs were slaughtered to determine tissue and organ weight at 10 and 60 days after birth, and serum antioxidant indexes were determined at 20 and 60 days after birth. The results showed as follows:1) there were no significant effects of maternal dietary nutrient level in late gestation on birth weight and body weight at suckling period (0 to 60 days after birth) (P>0.05), but with the nutrient level decreased, lamb birth weight had a decreased trend (0.05≤P < 0.10) and body weight at 40 and 50 days after birth had an increased trend (0.05≤P < 0.10). 2) At 0 day after birth, with the decrease of dietary nutrient level of ewes in late gestation, chest depth of lambs was significantly increased (P<0.01), while body length was significantly decreased (P<0.05); at 60 days after birth, with the decrease of dietary nutrient level of ewes in late gestation, chest depth and curved crown-rump length of lambs were significantly increased (P < 0.05 or P < 0.01). 3) At 10 days after birth, with the decrease of dietary nutrient level of ewes in late gestation, lung and liver weights of lambs were significantly decreased (P<0.05); at 60 days after birth, there was no significant difference on organ weight (P>0.05). 4) At 40 and 60 days after birth, with the decrease of dietary nutrient level of ewes in late gestation, serum total antioxidant capacity, superoxide dismutase activity and glutathione peroxidase content of lambs were significantly increased (P < 0.05 or P < 0.01), and serum malondialdehyde content was significantly decreased (P<0.05). In late gestation, when regulating dietary nutrient level by changing concentrate supplement to forage grass ratio, it is observed that low nutrient level (lower concentrate supplement ratio) had the tendency of decreasing birth weight of lambs, but after nutrient compensate, serum antioxidant capacity of lambs is improved, and growth performance recovers.

Cite this article

ZHANF Fan, CUI Kai, WANG Jie, DIAO Qiyu . Effects of Maternal Dietary Nutrient Level in Late Gestation on Growth Performance, Organ Development and Serum Antioxidant Capacity of Postpartum Lambs[J]. Chinese Journal of Animal Nutrition, 2017 , 29(2) : 636 -644 . DOI: 10.3969/j.issn.1006-267x.2017.02.033

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