Effects of Feeding Different Neutral Detergent Fiber Level Diets for Early Weaned Lambs on Growth Performance, Serological Parameters and Slaughter Performance of Lambs at Fattening Stage

XIE Biao, ZHANG Naifeng, CUI Kai, WANG Shiqin, LYU Xiaokang, ZHANG Chunxiang, DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2018.06.020

2018 , Vol. 30 >Issue 6: 2172 - 2181

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.06.020

Molecular Nutrition

Effects of Feeding Different Neutral Detergent Fiber Level Diets for Early Weaned Lambs on Growth Performance, Serological Parameters and Slaughter Performance of Lambs at Fattening Stage

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1. College of Animal Science and Technology, Shanxi Agricultural University, Taigu 030801, China;
2. Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute of Chinese Academy of Agricultural Sciences, Beijing 100081, China

Received date: 2017-11-09

Online published: 2018-06-20

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Abstract

This experiment was conducted to study the effects of feeding different neutral detergent fiber (NDF) level diets for early weaned lambs on growth performance, serological parameters and slaughter performance of lambs at fattening stage. One hundred healthy Hu lambs with body weight of (6.10±0.10) kg and (18±2) days of age were randomly divided into four groups with five replicates in each group and five lambs per replicate. Four diets were formulated, which contained 10% (10N group, as control group), 15% (15N group), 20% (20N group) and 25% (25N group) NDF, respectively. At 21 to 90 days of age, lamps in four groups were fed different NDF level diets; at 91 to 150 days of age, all lambs were fed the same total mixed ration. Six lambs in each group were selected to determine serological parameters, slaughter performance and organ development indices at 150 days of age. The results showed as follows:1) at 90 days of age, body weight in 15N, 20N and 25N groups was significantly higher than that in 10N group (P<0.05); at 120 days of age, body weight in 20N and 25N groups was significantly higher than that in 10N group (P<0.05); at 150 days of age, body weight in 20N and 25N groups had an increasing trend compared with 10N group (P=0.079). Average daily gain in 20N and 25N groups was significantly higher than that in 10N and 15N groups during 90 to 120 days of age (P<0.05), while it was significantly lower in 20N and 25N groups than that in 10N and 15N groups during 120 to 150 days of age (P<0.05). Average dry matter intake in 20N group was significantly higher than that in 10N group during 90 to 120 days of age (P<0.05). No significant differences were found in average daily gain, average dry matter intake and feed to gain ratio during 90 to 150 days of age among all groups (P>0.05). 2) Serum total protein (TP) content in 20N group was significantly higher than that in 10N group (P<0.05), serum albumin (ALB) content in 20N and 25N groups was significantly higher than that in 10N group (P<0.05), and serum β-hydroxybutyrate (BHBA) content in 25N group was significantly higher than that in 10N and 15N groups (P<0.05). 3) Carcass weight in 20N and 25N groups had an increasing trend compared with 10N group (P=0.061). 4) Proportion of head to live weight before slaughter was significantly higher for lambs in 10N group than that in 20N group (P<0.05), and no significant differences were found in other parameters (P>0.05). In conclusion, the diets of early weaned lambs containing more than 15% NDF can promote the growth performance of lambs at fattening stage.

Key words： neutral detergent fiber; early weaned lambs; growth performance; slaughter performance; metabolic imprinting

Cite this article

XIE Biao, ZHANG Naifeng, CUI Kai, WANG Shiqin, LYU Xiaokang, ZHANG Chunxiang, DIAO Qiyu . Effects of Feeding Different Neutral Detergent Fiber Level Diets for Early Weaned Lambs on Growth Performance, Serological Parameters and Slaughter Performance of Lambs at Fattening Stage[J]. Chinese Journal of Animal Nutrition, 2018 , 30(6) : 2172 -2181 . DOI: 10.3969/j.issn.1006-267x.2018.06.020

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