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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 1 - 7 (7page)
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Background: The continuing growth of the ethanol industry has generated large amounts of various distillers grains co-products. These are characterized by a wide variation in chemical composition and ruminal degradability.
Therefore, their precise formulation in the ruminant diet requires the systematic evaluation of their degradation profiles in the rumen.
Methods: Three distillers grains plus soluble co-products (DDGS) namely, corn DDGS, high-protein corn DDGS (HP-DDGS), and wheat DDGS, were subjected to an in situ trial to determine the degradation kinetics of the dry matter (DM) and crude protein (CP). Soybean meal (SBM), a feed with highly degradable protein in the rumen, was included as the fourth feed. The four feeds were incubated in duplicate at each time point in the rumen of three ruminally cannulated Hanwoo cattle for 1, 2, 4, 6, 8, 12, 24, and 48 h.
Results: Wheat DDGS had the highest filterable and soluble A fraction of its DM (37.2 %), but the lowest degradable B (49.5 %; P < 0.001) and an undegradable C fraction (13.3 %; P < 0.001). The filterable and soluble A fraction of CP was greatest with wheat DDGS, intermediate with corn DDGS, and lowest with HP-DDGS and SBM; however, the undegradable C fraction of CP was the greatest with HP-DDGS (41.2 %), intermediate with corn DDGS (2.7 %), and lowest with wheat DDGS and SMB (average 4.3 %). The degradation rate of degradable B fraction (% h−1) was ranked from highest to lowest as follows for 1) DM: SBM (13.3), wheat DDGS (9.1), and corn DDGS and HP-DDGS (average 5.2); 2) CP: SBM (17.6), wheat DDGS (11.6), and corn DDGS and HP-DDGS (average 4.4). The in situ effective degradability of CP, assuming a passage rate of 0.06 h−1, was the highest (P < 0.001) for SBM (73.9 %) and wheat DDGS (71.2 %), intermediate for corn DDGS (42.5 %), and the lowest for HP-DDGS (28.6 %), which suggests that corn DDGS and HP-DDGS are a good source of undegraded intake protein for ruminants.
Conclusions: This study provided a comparative estimate of ruminal DM and CP degradation characteristics for three DDGS co-products and SBM, which might be useful for their inclusion in the diet according to the ruminally undegraded to degraded intake protein ratio.
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참고문헌 (37)
참고문헌 신청
Boila R / 1994 / The ruminal degradation of dry matter, nitrogen and amino acids in wheat-based distillers’ dried grains in sacco / Anim Feed Sci Technol 48:57~72
Castro-Pérez BI / 2014 / Effects of replacing partially dry-rolled corn and soybean meal with different levels of dried distillers grains with solubles on growth performance, dietary energetics, and carcass characteristics in hairy lambs fed a finishing diet / Small Rumin Res 119:8~15
Klopfenstein TJ / 2008 / Use of distillers by-products in the beef cattle feeding industry / J Anim Sci 86:1223~1231
National Research Council (NRC) / 2007 / Nutrient requirements of small ruminants. Sheep, goats, cervids and New World camelids / Natl. Acad. Press
Paz H / 2013 / Invited review: ethanol co-products for dairy cows: there goes our starch… now what / Can J Anim Sci 93:407~425
Castro-Pérez BI / 2014 / Effects of replacing partially dry-rolled corn and soybean meal with different levels of dried distillers grains with solubles on growth performance, dietary energetics, and carcass characteristics in hairy lambs fed a finishing diet / Small Rumin Res 119:8~15
Klopfenstein TJ / 2008 / Use of distillers by-products in the beef cattle feeding industry / J Anim Sci 86:1223~1231
National Research Council (NRC) / 2007 / Nutrient requirements of small ruminants. Sheep, goats, cervids and New World camelids / Natl. Acad. Press
Paz H / 2013 / Invited review: ethanol co-products for dairy cows: there goes our starch… now what / Can J Anim Sci 93:407~425
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