Optimizing the use of hybrid rye in swine diets

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dc.contributor.authorSong, Jichen
dc.contributor.examiningcommitteeYang, Chengbo (Animal Science)
dc.contributor.examiningcommitteeSlominski, Bogdan (Animal Science)
dc.contributor.examiningcommitteeKoksel, Filiz (Food and Human Nutritional Sciences)
dc.contributor.examiningcommitteeDusel, Georg (Bingen Technical University of Applied Sciences)
dc.contributor.supervisorNyachoti, Martin
dc.date.accessioned2024-09-18T13:46:04Z
dc.date.available2024-09-18T13:46:04Z
dc.date.issued2024-09-18
dc.date.submitted2024-08-13T06:53:58Zen_US
dc.date.submitted2024-09-18T06:59:57Zen_US
dc.degree.disciplineAnimal Science
dc.degree.levelDoctor of Philosophy (Ph.D.)
dc.description.abstractA newly developed hybrid rye, promising for swine due to lower ergot alkaloid levels and higher yield, was evaluated for its nutritional value and any improvements via grain processing and enzyme supplementation. The first experiment determined the effects of particle size on digestible energy (DE), metabolizable energy (ME), and net energy (NE) contents of hybrid rye in growing pigs. Finely ground rye grain showed greater (P < 0.05) DE and ME contents than coarsely ground rye, with a tendency for higher NE (P = 0.084). The second experiment evaluated the effects of particle size and multi-carbohydrase (MC) supplementation on nutrient digestibility in hybrid rye. Diets containing finely ground hybrid rye had higher (P < 0.05) apparent total tract digestibility (ATTD) of neutral detergent fiber (NDF) and ether extract (EE). Multi-carbohydrase supplementation increased (P < 0.05) ATTD of dry matter (DM), gross energy (GE), crude protein (CP), NDF, and EE, and improved (P < 0.05) the standardized ileal digestibility (SID) of CP and most amino acids (AA). The third experiment investigated the effects of particle size and phytase supplementation on phosphorus (P) digestibility in hybrid rye. The ATTD and standardized total tract digestibility (STTD) of P were greater (P < 0.05) for diets containing finely ground grain than those containing coarsely ground grain. There were linear (P < 0.05) and quadratic (P < 0.05) improvement in the STTD of P with increasing phytase levels. The fourth study determined the effects of MC supplementation on growth performance, nutrient digestibility, short-chain fatty acids (SFCA) production, and gut microbiota composition in weaned piglets fed wheat-based or hybrid rye-based diets. Pigs fed wheat-based diets had higher (P < 0.05) average daily gain (ADG) and average daily feed intake (ADFI), with no differences (P > 0.10) in gain to feed ratio (G:F). Multi-carbohydrase supplementation of hybrid rye diets improved (P < 0.05) the ATTD of NDF and increased acetic acid, propionic acid, and total SCFA production, as well as the relative abundance of Bifidobacterium and Lactobacillus. In conclusion, grain processing and enzyme supplementation could significantly enhance the nutritional value of hybrid rye for pigs.
dc.description.noteOctober 2024
dc.identifier.urihttp://hdl.handle.net/1993/38619
dc.language.isoeng
dc.subjectHybrid rye
dc.subjectPigs
dc.subjectNutritional value
dc.subjectEnzyme supplementation
dc.subjectFeed processing
dc.titleOptimizing the use of hybrid rye in swine diets
local.subject.manitobano
project.funder.nameSwine Innovation Porc
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