| Contribution of exogenous dietary carbohydrases to the metabolizable energy value of corn distillers grains for broiler chickens. | |
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MedLine Citation:
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PMID: 20709980 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The objectives of this study were to determine the ileal digestible energy (IDE), ME, and ME(n) contents of corn distillers grains (CDG) for broiler chickens and to quantify these energy utilization responses to carbohydrase supplementation by the regression method. The CDG sample used in the current experiment contained (by analysis) 936 g/kg of DM, 4,894 kcal/kg of gross energy, 315.1 g/kg of CP, 94.6 g/kg of crude fat, 94.8 g/kg of crude fiber, 495.6 g/kg of neutral detergent fiber, 179.1 g/kg of acid detergent fiber, 0.19 g/kg of Ca, and 4.8 g/kg of P. The studies were conducted at 2 locations (Purdue or Louisiana State University) and CDG were incorporated into a practical corn-soybean meal diet at 3 levels (0, 300, or 600 g/kg) without or with added carbohydrase in a 2 x 3 x 2 factorial arrangement. The carbohydrase premix was added to supply 2,000 U of xylanase + 1,800 U of amylase/kg of feed. The diets were fed to 288 broiler chickens from d 15 to 22 posthatch with 6 birds per cage and 8 replicate cages per diet in a randomized complete block design at each of 2 locations. The broiler chicks were fed a standard broiler starter diet from d 1 to 15 posthatch. The IDE of diets decreased both linearly (P < 0.01) and quadratically (P < 0.05) as CDG increased from 0 to 600 g/kg regardless of carbohydrase supplementation. There was a linear (P < 0.01) decrease in ME of diet from 3,239 to 2,510 kcal/kg as CDG increased from 0 to 600 g/kg in the diets without added carbohydrase, whereas for birds fed the carbohydrase-supplemented diets, there were both linear (P < 0.01) and quadratic (P < 0.01) decreases from 3,398 to 2,613 kcal/kg as CDG increased from 0 to 600 g/kg. Dietary ME(n) linearly decreased (P < 0.01) regardless of carbohydrase supplementation as CDG increased from 0 to 600 g/kg. Supplementation with carbohydrase improved (P < 0.01) IDE, ME, and ME(n). Regressions of CDG-associated IDE, ME, or ME(n) intake in kilocalories against kilograms of CDG intake without added carbohydrase generated the following: IDE = 44 + 2,340X, r(2) = 0.953; ME = 10 + 2,315X, r(2) = 0.993; and ME(n) = 10 + 2,132X, r(2) = 0.991. Corresponding regressions when carbohydrase was added were as follows: IDE = -17 + 2,622X, r(2) = 0.985; ME = -25 + 2,448X, r(2) = 0.979; and ME(n) = -22 + 2,264X, r(2) = 0.978. These data indicate that the respective IDE, ME, and ME(n) values (kcal/kg of DM) of the CDG sample evaluated were 2,340, 2,315, and 2,132 when carbohydrase was not added and 2,622, 2,448, and 2,264 when carbohydrase was added. Comparison using ANOVA procedures indicated that the slope when carbohydrase was added was greater (P < 0.05) than when carbohydrase was not added. This response implies that carbohydrase supplementation improved (P < 0.05) the IDE, ME, and ME(n) of CDG in practical corn-soybean meal-based diets used in this current study by 12, 5.7, and 6.2%, respectively. |
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Authors:
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O Adeola; J A Jendza; L L Southern; S Powell; A Owusu-Asiedu |
Publication Detail:
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Type: Controlled Clinical Trial; Journal Article |
Journal Detail:
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Title: Poultry science Volume: 89 ISSN: 0032-5791 ISO Abbreviation: Poult. Sci. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-08-16 Completed Date: 2010-10-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401150 Medline TA: Poult Sci Country: United States |
Other Details:
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Languages: eng Pagination: 1947-54 Citation Subset: IM |
Affiliation:
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Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA. ladeola@purdue.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed
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analysis* Animal Nutritional Physiological Phenomena Animals Cereals Chickens / metabolism* Diet / veterinary Energy Intake / physiology Energy Metabolism / physiology* Glycoside Hydrolases / metabolism* Male Zea mays* |
| Chemical | |
Reg. No./Substance:
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EC 3.2.1.-/Glycoside Hydrolases; EC 3.2.1.-/carbohydrase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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