Effects of Brewer&rsquo;s Grains on Ruminal Degradation Characteristics and Apparent Digestibilities of Dietary Nutrients

YANG Luling; LYU Yongyan; SONG Xihai; SUN Guoqiang

doi:10.3969/j.issn.1006-267x.2014.03.032

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 3: 792 - 802

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.03.032

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Effects of Brewer’s Grains on Ruminal Degradation Characteristics and Apparent Digestibilities of Dietary Nutrients

YANG Luling ,
LYU Yongyan ,
SONG Xihai ,
SUN Guoqiang

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1. College of Animal Science and Technology Academy, Qingdao Agricultural University, Qingdao 266109, China;
2. Laizhou Chaipeng Animal Husbandry and Veterinary Station, Laizhou 261435, China

Received date: 2013-09-25

Online published: 2014-03-04

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Abstract

This experiment was conducted to investigate the effects of different supplemental levels of brewer's grains (BSG) on ruminal degradation characteristics and apparent digestibilities of dietary nutrients. Four healthy Laoshan dairy goats[(40.0±2.5) kg] with permanent ruminal cannulas were used, and a 4×4 Latin square design was adopted in this experiment. Based on dry matter (DM) of a basal diet, goats were supplemented with 0, 10%, 15% and 20% BSG, respectively. Ruminal degradation characteristics and apparent digestibilities of dietary nutrients were determined using the methods of nylon bag and endogenous indicator, respectively. The results showed as follows: 1) BSG supplemental level had significant effects on ruminal degradation rates of nutrients excluding that of crude protein (CP) at 72 h (P<0.05 or P<0.01), and significantly increased ruminal effective degradation rates of DM, organic matter (OM) and neutral detergent fiber (NDF) (P<0.05 or P<0.01), but had no significant effect on ruminal effective degradation rate of acid detergent fiber (ADF) (P>0.05). 2) BSG supplemental level had significant effects on nutrient intake (P<0.05), and supplemented with 15% BSG had the highest nutrient intake. 3) Compared with the control group, the supplementation of 10% BSG had no significant effects on apparent digestibilities of nutrients (P>0.05); the supplementation of 15% BSG significantly increased apparent digestibilities of DM, OM, NDF, ADF and CP (P<0.05); the apparent digestibility of NDF was significantly increased when the supplemental level of BSG was 20% (P<0.05), but not for the rest nutrients (P>0.05). Considering ruminal degradation characteristics, intake and apparent digestibilities of dietary nutrients, the optimal supplemental level of BSG is 15% in the basal diet (DM basis) under the conditions of the present experiment.

Key words： brewer's grains; ruminal degradation characteristic; ruminal effective degradation rate; apparent digestibility

Cite this article

YANG Luling , LYU Yongyan , SONG Xihai , SUN Guoqiang . Effects of Brewer’s Grains on Ruminal Degradation Characteristics and Apparent Digestibilities of Dietary Nutrients[J]. Chinese Journal of Animal Nutrition, 2014 , 26(3) : 792 -802 . DOI: 10.3969/j.issn.1006-267x.2014.03.032

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