Acta Univ. Agric. Silvic. Mendelianae Brun. 2012, 60(1), 97-104 | DOI: 10.11118/actaun201260010097

An assessment of differences in the ruminal degradability and intestinal digestibility of crude protein in brewer's grains and maize draff

Vladimír Majer1, Pavel Veselý2
1 Victus LA s. r. o., Těšínská 329, 716 00, Ostrava, Česká republika
2 Ústav výživy zvířat a pícninářství, Mendelova univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika

The submitted thesis aims to assess the differences between the ruminal degradability and intestinal digestibility of crude protein contained in brewer's grains (BG) and maize draff (AMG). The effectiveness of ruminal degradability was tested using the "in sacco" method on 3 dry Holstain cows fitted with rumen cannulas. The dynamics of ruminal degradability of crude protein (CP) was detected after 0, 4, 8, 16, and 24 hours of samples incubation in the rumen. The intestinal digestibility of crude protein undegradable in the rumen was determined using the "mobile bag" method on 3 dry Holstain cows fitted with duodenal cannulas. The crude protein degradability of BG was detected in the above-mentioned hours (%): 4.06; 18.16; 32.40; 38.56, and 50.70; crude protein degradability of AMG: 42.04; 63.56; 84.47; 85.16, and 87.19. The effectiveness of rumen degradability of BG crude protein at the rate of passage of rumen content 6 % per hour was calculated at 35.33 % and that of AMG, at 76.29 %. Intestinal digestibility of BG crude protein and dry matter at the rate of passage of intestinal content 6 % per hour was calculated at 79.41 % and 22.84 %, respectively, and that of AMG, at 57.01 % and 11.33 %, respectively. The differences between the indicators of both feedstuffs were significant (P < 0.05). The results show that BG are mostly a source of crude protein with higher intestinal digestibility than AMG.

Keywords: fresh brewer's grains, fresh maize draff, in sacco method, ruminal degradability, mobile bag method, intestinal digestibility
Grants and funding:

This study was supported by the Research plan No. MSM6215648905 "Biological and technological aspects of sustainability of controlled ecosystems and their adaptability to climate change", which is financed by the Ministry of Education, Youth and Sports of the Czech Republic.

Received: August 31, 2011; Prepublished online: October 5, 2013; Published: October 9, 2013  Show citation

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Majer, V., & Veselý, P. (2012). An assessment of differences in the ruminal degradability and intestinal digestibility of crude protein in brewer's grains and maize draff. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 60(1), 97-104. doi: 10.11118/actaun201260010097
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