E-ISSN 2223-0343

In situ ruminal degradation and intestinal digestion of crude protein and amino acids of three major proteinaceous feeds for Hanwoo steers

Y. K. Oh1, Y. J. Park1, Y. C. Baek1, Y. J. Do2, D. H. Kim3, W. S. Kwak4 and H. Choi1*

1Animal Nutrition & Physiology Team, National Institute of Animal Science, Rural Development Administration, Wanju county 565-851, Jeon-Buk province, Republic of Korea; 2Animal Diseases & Biosecurity Team, National Institute of Animal Science, Rural Development Administration, Wanju county 565-851, Jeon-Buk province, Republic of Korea 3Eco-friendly Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup county 580-185, Jeon-Buk province, Republic of Korea; 4Konkuk University, Chung-Buk province, Republic of Korea

 
Abstract

Three Hanwoo steers (mean body weight 520 ± 20.2 kg), each fitted with a permanent ruminal cannula and a T-shaped duodenal cannula, were used to examine digestibility of crude protein (CP), rumen undegraded protein (RUP), and individual amino acids (AA) of three proteinaceous feeds (cottonseed meal, CSM; perilla meal, PRM; rapeseed meal, RSM), by using in situ bag and in situ mobile bag techniques. The in situ RUP value was higher in PRM (69.1%) than in CSM (54.0%) and RSM (41.9%) (p<0.05). In most cases, intestinal digestibility of CP was higher than ruminal degradability of CP. The intestinal degradation of Lys was not different among CSM (41.1%), PRM (59.3%), and RSM (48.7%). The pattern of intestinal digestion of Met was similar to that of Lys. Furthermore, PRM showed the highest intestinal digestibility and total tract digestibility of AA compared with other tested feeds. Overall, these results suggest that PRM may be used as a good protein source for ruminants. These results may be used as baseline data for ruminant ration formulation.

Keywords: Crude protein; rumen undegraded protein; amino acid; Perila meal; degradation
 
To cite this article: Oh, YK, Park YJ, YC Baek, YJ Do, DH Kim, WS Kwak and H Choi, 2015. In situ ruminal degradation and intestinal digestion of crude protein and amino acids of three major proteinaceous feeds for Hanwoo steers. Res. Opin. Anim. Vet. Sci., 5(10): 395-400.
 
 
 
 

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