Energy utilization and amino acid digestibility of fractionated DDGS determined with laying hens, turkey poults, and broiler chickens

Patrick M Banks, Purdue University

Abstract

Six studies were conducted to evaluate the effect of inclusion of condensed distillers' solubles (CDS) or the drying process (heat vs. freeze-drying) of co-products from ethanol plants with the objective to determine the impact on nutrient content and nutrient availability. The test ingredients were analyzed to determine metabolizable energy (ME), nitrogen corrected ME (MEn), apparent ileal digestibility (AID) and standardized ileal digestibility (SID) of amino acids when fed to laying hens, turkey poults, and broiler chickens. The SID was obtained by correction of AID values with determined basal ileal endogenous amino acid (AA) flow from laying hens, turkey poults, and broiler chickens fed a nitrogen free diet (NFD). The investigated test ingredients were high-protein distillers' dried grains (HP-DDG), high-protein distillers' dried grains with solubles (HP-DDGS), and a freeze dried blend (FDB) of HP-DDG and CDS. The test ingredients contained 58, 48, 53% CP, 1.9, 2.7, 3.6% fat, 42, 28, 32% NDF, and 26, 16, 23% ADF for HP-DDG, HP-DDGS, and FDB, respectively. The HP-DDG was used as a comparison to HP-DDGS to determine the impact of inclusion of CDS on nutrient use by the bird. The FDB was used as a comparison with HP-DDGS to determine the impact of heat drying. The ME of HP-DDG was determined to be 3850, 2153, and 2099 kcal/kg for laying hens, turkey poults, and broiler chickens, respectively. The MEn of HP-DDG was determined to be 3663, 1656, and 1979 kcal/kg for laying hens, turkey poults, and broiler chickens, respectively. The AID of dry matter (DM) of HP-DDG was determined to be 70% for laying hens, and turkey poults, and 77% for broiler chickens. The SID of the total AA from HP-DDG was determined to be 64, 75, and 74% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Met from HP-DDG was determined to be 72, 83, and 79% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Lys from HP-DDG was determined to be 33, 53, and 56% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Thr from HP-DDG was determined to be 57, 61, and 59% for laying hens, turkey poults, and broiler chickens, respectively. The ME of HP-DDGS was determined to be 4441, 3596, and 3254 kcal/kg for laying hens, turkey poults, and broiler chickens, respectively. The MEn of HP-DDGS was determined to be 4226, 2968, and 2856 kcal/kg for laying hens, turkey poults, and broiler chickens, respectively. The AID of DM of HP-DDGS was determined to be 79, 76, and 80% for laying hens, turkey poults, and broiler chickens, respectively. The SID of the total AA from HP-DDGS was determined to be 62, 78, and 79% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Met from HP-DDGS was determined to be 69, 86, and 83% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Lys from HP-DDGS was determined to be 39, 64, and 58% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Thr from HP-DDGS was determined to be 56, 70, and 64% for laying hens, turkey poults, and broiler chickens, respectively. The ME of FDB was determined to be 4158, 3010, and 2968 kcal/kg for laying hens, turkey poults, and broiler chickens, respectively. The MEn of FDB was determined to be 4077, 2706, and 2433 kcal/kg for laying hens, turkey poults, and broiler chickens, respectively. The AID of DM of FDB was determined to be 77, 75, and 79% for laying hens, turkey poults, and broiler chickens, respectively. The SID of the total AA from FDB was determined to be 68, 80, and 77% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Met from FDB was determined to be 76, 87, and 82% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Lys from FDB was determined to be 41, 58, and 56% for laying hens, turkey poults, and broiler chickens, respectively. The SID of Thr from FDB was determined to be 62, 69, and 62% for laying hens, turkey poults, and broiler chickens, respectively. In the energy studies, inclusion of CDS (HP-DDG vs. HP-DDGS) significantly increased both ME and MEn by 15% in laying hens, 67 and 79% in turkey poults, respectively, and 55 and 44% in broiler chickens, respectively. In the digestibility studies, inclusion of CDS (HP-DDG vs. HP-DDGS) increased the SID of Lys by 6, 11 and 2% units in laying hens, turkey poults and broiler chickens, respectively. (Abstract shortened by UMI.)

Degree

M.S.

Advisors

Applegate, Purdue University.

Subject Area

Animal sciences

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