| Determination and prediction of digestible and metabolizable energy from chemical analysis of corn co-products fed to finishing pigs. | |
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MedLine Citation:
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PMID: 22147488 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Twenty corn co-products from various wet- and dry-grind ethanol plants were fed to finishing pigs to determine DE and ME, and to generate equations predicting DE and ME based on chemical analysis. A basal diet was composed of corn (97.05%), limestone, dicalcium phosphate, salt, vitamins, and trace minerals. Twenty test diets were formulated by mixing the basal diet with 30% of a co-product, except for dried corn solubles and corn oil, which were included at 20 and 10%, respectively. There were 8 groups of 24 finishing gilts (n = 192; BW = 112.7 ± 7.9 kg). Within each group, gilts were randomly assigned to 1 of 5 test diets or the basal diet for a total of 4 replications per diet per group. Two groups of gilts were used for each set of co-products, resulting in 8 replications per co-product and 32 replications of the basal diet. The experiment was conducted as a completely randomized design. Gilts were placed in metabolism crates and offered 3 kg daily of their assigned test diet for 13 d with total collection of feces and urine during the last 4 d. Ingredients were analyzed for DM, GE, CP, ether extract (EE), crude fiber, NDF, ADF, total dietary fiber (TDF), ash, AA, and minerals, and in vitro OM digestibility was calculated for each ingredient. Gross energy was determined in the diets, feces, and urine to calculate DE and ME for each ingredient. The DE and ME of the basal diet were used as covariates among groups of pigs. The DE of the co-products ranged from 2,517 kcal/kg DM (corn gluten feed) to 8,988 kcal/kg DM (corn oil), and ME ranged from 2,334 kcal/kg DM (corn gluten feed) to 8,755 (corn oil) kcal/kg DM. By excluding corn oil and corn starch from the stepwise regression analysis, a series of DE and ME prediction equations were generated. The best fit equations were: DE, kcal/kg DM = -7,471 + (1.94 × GE) - (50.91 × EE) + (15.20 × total starch) + (18.04 × OM digestibility) with R(2) = 0.90, SD = 227, and P < 0.01; and ME, kcal/kg DM = (0.90 × GE) - (29.95 × TDF) with R(2) = 0.72, SE = 323, and P < 0.01. Additional equations for DE and ME included NDF in the instance that TDF data are not available. These results indicate that DE and ME varied substantially among corn co-products, and that various nutritional components can be used to accurately predict DE and ME in corn co-products for finishing pigs. |
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Authors:
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P V Anderson; B J Kerr; T E Weber; C J Ziemer; G C Shurson |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-6 |
Journal Detail:
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Title: Journal of animal science Volume: - ISSN: 1525-3163 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Animal Science, Iowa State University, Ames 50011. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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