2026-09-22T02:02:41Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/113218 2023-07-11 col_2142_5131 col_2142_14771 com_2142_5130 com_2142_685 com_2142_397

Emmert, Jason L Parsons, Ben W 2022-01-12T22:35:20Z 2022-01-12T22:35:20Z 2024-01-12T22:35:30Z 2021-07-20 2021-08 The nutritional characteristics of conventional distillers dried grains with solubles (DDGS), corn fermented protein (CFP), high protein-DDGS (HP-DDGS), reduced fiber high protein-DDGS (RFHP-DDGS), and reduced phosphorus-DDGS (RP-DDGS) were evaluated. The precision-fed rooster assay was utilized to measure TMEn and standardized amino acid (AA) digestibility. Corn fermented protein contained an average of 56% CP (DM basis), which was higher than 32% CP for conventional DDGS. The CFP also contained a higher (P < 0.05) TMEn of 3,556 kcal/kg DM compared with 2,767 kcal/kg for conventional DDGS. Standardized AA digestibility of CFP was high and the mean digestibility of all AA ranged from 89% to 94% among samples. Digestible AA concentrations were increased substantially for CFP; for example, digestible Lys content was increased from 0.79% for conventional DDGS to 1.74% for CFP. High protein-DDGS contained 50.9% CP (DM basis) and the TMEn was 3,325 kcal/kg DM. The average standardized AA digestibility was high (88%) and digestible AA contents were increased compared with conventional DDGS. Reduced fiber high protein-DDGS contained 48% CP and the TMEn was 3,711 kcal/kg DM. The standardized AA digestibility of RFHP-DDGS and conventional DDGS was high, although some samples exhibited reduced Lys digestibility, and RFHP-DDGS contained higher concentrations of digestible AA compared with conventional DDGS. The RP-DDGS contained 0.39% total P compared with 0.86% total P for conventional DDGS (DM basis). Reduced P-DDGS also contained a larger ash and Ca content compared with conventional DDGS, and the TMEn was reduced (P < 0.05) to 2,840 kcal/kg from 3,428 kcal/kg DM. The standardized AA digestibility and digestible AA content were similar between RP-DDGS and conventional DDGS. Apparent ileal P digestibility determined in precision-fed chicks was reduced from 81% for conventional DDGS to 59% for RP-DDGS, and dietary Ca level had no effect on ileal P digestibility. In another experiment using precision-fed chicks, the apparent ileal P digestibility of conventional DDGS was found to decrease (P < 0.05) from 80% to 48% when the Ca:total P ratio was increased from 0.3 to 1.3. A similar effect was also observed using ad libitum-fed chicks; thus, when the dietary Ca:total P ratio increased from 1.3 to 2.5, the ileal P digestibility was reduced (P < 0.05) from 63% to 42%, respectively. The P bioavailability of conventional DDGS relative to KH2PO4 based on bone ash data was also determined. Bioavailability of P based on bone ash content (mg/tibia) was 61%. This value was similar to P digestibility when a 1.3 Ca:total P ratio was used. Results from these studies indicate that CFP, HP-DDGS, and RFHP-DDGS have improved nutritional value for poultry compared with conventional DDGS. It was also observed that RP-DDGS contained both a lower total and digestible P content relative to conventional DDGS, and the P digestibility and bioavailability of conventional DDGS was frequently influenced by the method used (precision-fed chicks, ad libitum-fed chicks, relative bioavailability based on bone ash) and dietary Ca level. Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-08-01 The student, Ben Parsons, accepted the attached license on 2021-07-20 at 08:44. The student, Ben Parsons, submitted this Thesis for approval on 2021-07-20 at 08:55. This Thesis was approved for publication on 2021-07-20 at 11:55. DSpace SAF Submission Ingestion Package generated from Vireo submission #17018 on 2022-01-12 at 12:55:32 Made available in DSpace on 2022-01-12T22:35:20Z (GMT). No. of bitstreams: 2 PARSONS-THESIS-2021.pdf: 908580 bytes, checksum: d04bcba28565f732760eaaccc0c74597 (MD5) LICENSE.txt: 4208 bytes, checksum: 82e5e50f5b7fb4a83cba72c167ce7c5d (MD5) Previous issue date: 2021-07-20 Embargo set by: Seth Robbins for item 121144 Lift date: 2024-01-12T22:35:30Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only application/pdf http://hdl.handle.net/2142/113218 en Copyright 2021 Ben Parsons distillers dried grains with solubles true metabolizable energy amino acid digestibility phosphorus digestibility phosphorus bioavailability poultry Nutritional evaluation of conventional, high protein, reduced fiber, and reduced phosphorus corn co-products for poultry text Thesis Animal Sciences Animal Sciences University of Illinois at Urbana-Champaign Thesis M.S.