Effective Degradability of Total Mixed Ration with Different Levels of Brewing Residue of Grape Seed in Rumen of Fattening Sheep

GAO Xinmei, ZHENG Fan, TANG Fu, JIA Chunyun, YANG Zhenhua, GAO Wei

doi:10.3969/j.issn.1006-267x.2018.04.041

2018 , Vol. 30 >Issue 4: 1555 - 1565

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.04.041

Molecular Nutrition

Effective Degradability of Total Mixed Ration with Different Levels of Brewing Residue of Grape Seed in Rumen of Fattening Sheep

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College of Animal Science and Technology, Shihezi University, Shihezi 832000, China

Received date: 2017-10-16

Online published: 2018-04-03

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Abstract

The purpose of this experiment was to evaluate the effective degradability of total mixed ration (TMR) with different levels of brewing residue of grape seed (GSBR) in rumen of fattening sheep. Three Kazakh wethers weighed (35.0±3.7) kg with permanent rumen cannulas were used as experimental animals. The test consists of five periods, rumen perfusion tests were conducted using TMRs with different GSBR levels[0 (TMR1), 4.17% (TMR2), 8.33% (TMR3), 12.50% (TMR4) and 16.67% (TMR5)], respectively. The tests were carried out from low to high GSBR levels. Each period lasted for 15 d, day 1 to 7 was for pre-test period, day 8 to 12 was for continuous perfusion period, and day 13 to 15 was for sampling period. At the same time, the nylon bag test was carried out on day 13 to 15 of each period. Ytterbium-acetate (Yb-ac) was used as the marker for digesta, and its decay curve was mapped to calculate outflow rate (Kp) using nonlinear regression; degradation kinetic parameters of dry matter (DM), organic matter (OM) and crude protein (CP) were evaluated, and ruminal effective degradability was calculated. The results showed as follows:ruminal digesta Kp had significantly linearly positive relationship with GSBR level (r=0.607 0, P<0.05); effective degradability of DM, OM and CP showed then tendency of firstly decrease and then stable or slightly increase with the increase of GSBR level in TMR, TMR4 and TMR5 groups were significantly lower than TMR1 group (P<0.05); the five TMRs were all ruminal energy and nitrogen negative balance type, and ruminal energy nitrogen balance value was linearly decreased with the increase of the GSBR level (P=0.005 5). In conclusion, the optimal level of GSBR in TMR for fattening sheep is 8.33% to 12.50%.

Key words： outflow rate; ruminal degradability; effective degradability; ruminal energy and nitrogen balance; fattening sheep

Cite this article

GAO Xinmei, ZHENG Fan, TANG Fu, JIA Chunyun, YANG Zhenhua, GAO Wei . Effective Degradability of Total Mixed Ration with Different Levels of Brewing Residue of Grape Seed in Rumen of Fattening Sheep[J]. Chinese Journal of Animal Nutrition, 2018 , 30(4) : 1555 -1565 . DOI: 10.3969/j.issn.1006-267x.2018.04.041

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