Effects of Starters with Different Neutral Detergent Fiber Levels on Growth Performance and Nutrient Apparent Digestibility of 7 to 56-Day-Old Lambs

PANG Xin; LYU Feng; WANG Xiaojuan; LIU Guohua; LI Chong; ZHAO Haibi

doi:10.3969/j.issn.1006-267x.2021.07.058

2021 , Vol. 33 >Issue 7: 4175 - 4182

DOI: https://doi.org/10.3969/j.issn.1006-267x.2021.07.058

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Effects of Starters with Different Neutral Detergent Fiber Levels on Growth Performance and Nutrient Apparent Digestibility of 7 to 56-Day-Old Lambs

PANG Xin ,
LYU Feng ,
WANG Xiaojuan ,
LIU Guohua ,
LI Chong ,
ZHAO Haibi

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College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China

Received date: 2020-12-16

Online published: 2021-07-06

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Abstract

This experiment was conducted to investigate the effects of starters with different neutral detergent fiber (NDF) levels on growth performance and nutrient apparent digestibility at 7 to 56-day-old lambs, and to determine the appropriate NDF levels in starters. A total of 54 male lambs with initial birth weight of (3.58±0.06) kg were selected and randomly divided into 3 groups, At 7 days of age, the milk substitute and the starters were fed, the NDF level of the starter was respectively 15%, 20% and 25%. Lambs were weaned at 28 days of age, and slaughtered at 56 days of age. The results showed as follows:1) the average daily gain (ADG) and average daily feed intake (ADFI) in the 20% and 25% NDF groups were significantly higher than those in the 15% NDF group (P<0.05). 2) The NDF level of starters affected the apparent digestibilities of dry matter (DM) and crude protein (CP). During 21 to 28 days of age, 42 to 49 days of age, 49 to 56 days of age and 7 to 56 days of age, the DM apparent digestibility in 20% NDF group was significantly higher than that in the 15% and 25% NDF groups (P<0.05). During 28 to 49 days of age, the CP apparent digestibility in 20% NDF group was significantly higher than that in the 15% and 25% NDF groups (P<0.05). The NDF apparent digestibility and ADF apparent digestibility in 20% NDF group were significantly higher than those in the 15% and 25% NDF groups (P<0.01). It is concluded that the appropriate NDF level of starters is 20% on lambs in the present study.

Key words： lamb; starter; NDF; growth performance; nutrient apparent digestibility

Cite this article

PANG Xin , LYU Feng , WANG Xiaojuan , LIU Guohua , LI Chong , ZHAO Haibi . Effects of Starters with Different Neutral Detergent Fiber Levels on Growth Performance and Nutrient Apparent Digestibility of 7 to 56-Day-Old Lambs[J]. Chinese Journal of Animal Nutrition, 2021 , 33(7) : 4175 -4182 . DOI: 10.3969/j.issn.1006-267x.2021.07.058

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