Show simple item record

dc.contributor.advisorPatience, John F.en_US
dc.creatorOresanya, Temitope Fredericken_US
dc.date.accessioned2005-09-17T07:45:03Zen_US
dc.date.accessioned2013-01-04T04:58:50Z
dc.date.available2005-09-19T08:00:00Zen_US
dc.date.available2013-01-04T04:58:50Z
dc.date.created2005-08en_US
dc.date.issued2005-08-11en_US
dc.date.submittedAugust 2005en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-09172005-074503en_US
dc.description.abstractDietary energy is the largest single cost in pork production. Accurate and current understanding of energy metabolism is crucial to production efficiency. The overall objective of this thesis was to evaluate the effects of dietary energy concentration and energy intake on growth, nutrient deposition rates and energy utilization in weaned pigs. In experiment 1, the optimum total lysine:DE ratio for weaned pigs was estimated at 4.27 and 4.46 g/Mcal for pigs growing from 7.5 to 12.8 kg and 7.5 to 22.5 kg BW, respectively. Experiment 2 determined if a more predictable growth, nutrient deposition and energy utilization in the weaned pig is achieved with NE or with DE. ADG either remained similar or was depressed with increased NE compared to the control (P < 0.05). Empty body protein content and deposition (PD) declined relative to the control (P < 0.05) and lipid content and deposition (LD) tended to increase (P < 0.10). Body composition and nutrient deposition rates were more correlated with determined NE concentration and intake compared with DE. The results of Experiment 3 indicated that amino acid intake impaired the growth of pigs when an energy intake restriction greater than 30% occurred. Experiment 4 investigated the interaction of dietary NE concentration and feeding levels (FL) on body weight gain, tissue (protein, lipid, ash, water) accretion rates and ratios. Growth performance was not affected by NE (P > 0.05) but increased with feeding level (P < 0.001). Energy intake increased with NE and FL (P < 0.001), but the efficiency of energy utilization for growth declined (P < 0.05). Empty body protein content declined (P < 0.05) while lipid content increased with NE (interaction, P < 0.05). Empty body PD was not affected by NE (P > 0.05) but both LD and LD:PD ratio increased (interaction, P < 0.001). These data suggest that when amino acid:energy ratio is optimal, increasing dietary energy concentration increased energy intake but does not improve PD and overall body weight gain of weaned pigs. However, body lipid content and LD were increased. Finally, NE offers an advantage over the DE in predicting the body composition and nutrient deposition rates rather than in overall BW gain.en_US
dc.language.isoen_USen_US
dc.subjectIntakeen_US
dc.subjectenergy concentrationen_US
dc.subjectpigen_US
dc.subjectnutrient depositionen_US
dc.subjectgrowthen_US
dc.subjectbody compositionen_US
dc.titleEnergy metabolism in the weanling pig : effects of energy concentration and intake on growth, body composition and nutrient accretion in the empty bodyen_US
thesis.degree.departmentAnimal and Poultry Scienceen_US
thesis.degree.disciplineAnimal and Poultry Scienceen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophy (Ph.D.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberZijlstra, Ruurd T.en_US
dc.contributor.committeeMemberZello, Gordon A.en_US
dc.contributor.committeeMemberMaxwell, Charles V.en_US
dc.contributor.committeeMemberChristensen, David A.en_US
dc.contributor.committeeMemberBuchanan, Fiona C.en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record