Effects of Different Levels of Dietary Neutral Detergent Fiber on Growth Performance, Serum Parameters, Slaughter Performance and Tissue and Organ Development of Early-Weaned Hu Lambs

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

doi:10.3969/j.issn.1006-267x.2018.03.020

2018 , Vol. 30 >Issue 3: 963 - 972

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.03.020

Molecular Nutrition

Effects of Different Levels of Dietary Neutral Detergent Fiber on Growth Performance, Serum Parameters, Slaughter Performance and Tissue and Organ Development of Early-Weaned Hu Lambs

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

Received date: 2017-09-03

Online published: 2018-03-05

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Abstract

This experiment was conducted to study the effects of different levels of dietary neutral detergent fiber (NDF) on growth performance, serum parameters, slaughter performance and tissue and organ development of early-weaned hu lambs. One hundred healthy Hu lambs with similar body weight[(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 in each replicate. Lambs in four groups were fed diets containing 10% (10N group), 15% (15N group), 20% (20N group) and 25% (25N group) NDF, respectively. All lambs received milk replacer at 21 to 60 days of age. The pre-experimental period lasted for 3 days, and the experimental period lasted for 70 days. The results showed as follows:1) at 50, 60 and 90 days of age, the average body weight of lambs in 20N and 25N groups was significantly higher than that in 10N group (P<0.05), correspondly, at 41 to 50, 51 to 60 and 21 to 60 days of age, the average daily gain and average dry matter intake of lambs in 20N and 25N groups were significantly higher than those in 10N group (P<0.05). The feed to gain ratio of lambs had no significant difference among all groups at all periods except at 51 to 60 days of age (P>0.05). 2) The serum creatinine content of lambs in 15N group was significantly higher than that in 20N and 25N groups (P<0.05), the serum β-hydroxybutyrate content of lambs in 15N, 20N and 25N groups was significantly higher than that in 10N group (P<0.05). 3) The live weight before slaughter and carcass weight of lambs in 20N and 25N groups were significantly higher than those in 10N group (P<0.05). 4) The head percentage of live weight before slaughter of lambs in 25N group was significantly lower than that in 10N group (P<0.05), but the feet weight, heart weight, liver weight and spleen weight of lambs were significantly higher than those in 10N group (P<0.05). The heart weight and liver weight of lambs in 20N group were significantly higher than those in 10N group (P<0.05). In conclusion, when dietary NDF level was 20% or 30%, it can improve the growth performance, slaughter performance and organ weight such as heart and liver of lambs.

Key words： NDF; early-weaned lambs; growth performance; slaughter performance

Cite this article

XIE Biao, ZHANG Naifeng, CUI Kai, WANG Shiqin, LYU Xiaokang, DIAO Qiyu . Effects of Different Levels of Dietary Neutral Detergent Fiber on Growth Performance, Serum Parameters, Slaughter Performance and Tissue and Organ Development of Early-Weaned Hu Lambs[J]. Chinese Journal of Animal Nutrition, 2018 , 30(3) : 963 -972 . DOI: 10.3969/j.issn.1006-267x.2018.03.020

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