Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/2382
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dc.contributor.authorMigwi, Perminus Karubinen
dc.contributor.authorGodwin, Ianen
dc.contributor.authorNolan, Johnen
dc.contributor.authorKhan, Lewisen
dc.date.accessioned2009-09-15T16:34:00Z-
dc.date.created2006en
dc.date.issued2007-
dc.identifier.urihttps://hdl.handle.net/1959.11/2382-
dc.description.abstractThe studies in this thesis were undertaken to investigate ways to improve the value of roughages and byproducts as feeds for ruminants through supplementation. Low quality basal roughages are high in fibre, low in N and other minerals; as a result their comminution rate in the rumen (and clearance rate) is generally low, leading to low intake. Moreover, their digestion in the gut often results in absorption of digestion products that are imbalanced in protein to energy (PIE), and also in glucogenic to acetogenic substrates. The imbalance in nutrients leads to inefficiency in the utilisation of the absorbed nutrients, often manifesting as high heat increment and generally low voluntary intake (MacRae and Lobley 1982; MacRae et al. 1987). This problem is further compounded by the high ambient temperature in the tropics where most of the ruminant livestock subsisting on crop residues are raised, which makes dissipation of heat very difficult (Preston and Leng 1987; Leng 1990). Animals in the tropical environments therefore respond to low digestibility feeds by reducing feed intake which leads to lower animal productivity (Preston and Leng 1987). This study investigated how strategic supplementation with rumen degradable nutrients and by-pass nutrients in animals fed low quality roughage basal diets may be used to stimulate an efficient rumen fermentation (and intestinal digestion). It was hypothesized that this is likely to result in the absorption of balanced nutrients (PIE and glucogeniclacetogenic ratio) from the gut, and therefore enhance efficiency in nutrient metabolism in the body tissues, resulting in improved animal productivity (Leng 1990). The broad objective of the present study was to investigate the role of dietary N, protein and energy supplementation and ammoniation with urea in stimulating higher rumen fermentation, with a view of providing the small intestines with a better balance of protein and energy substrates (P: E), as well as of glucogenic to acetogenic substrates for digestion and absorption. It was hypothesized that when the body tissues are provided with balanced nutrients, this would lead to more efficient utilisation of those nutrients, lower heat production, and therefore higher animal productivity.en
dc.languageenen
dc.titleThe role of feed supplements in improving intake and utilisation of low quality roughage in ruminantsen
dc.typeThesis Doctoralen
dcterms.accessRightsUNE Greenen
local.contributor.firstnamePerminus Karubinen
local.contributor.firstnameIanen
local.contributor.firstnameJohnen
local.contributor.firstnameLewisen
dcterms.RightsStatementCopyright 2006 - Perminus Karubin Migwien
dc.date.conferred2007en
local.thesis.degreelevelDoctoralen
local.thesis.degreenameDoctor of Philosophyen
local.contributor.grantorUniversity of New Englanden
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailigodwin@une.edu.auen
local.profile.emailjnolan@une.edu.auen
local.output.categoryT2en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordvtls086368755en
local.access.fulltextYesen
local.contributor.lastnameMigwien
local.contributor.lastnameGodwinen
local.contributor.lastnameNolanen
local.contributor.lastnameKhanen
dc.identifier.staffune-id:igodwinen
dc.identifier.staffune-id:jnolanen
local.profile.roleauthoren
local.profile.rolesupervisoren
local.profile.rolesupervisoren
local.profile.rolesupervisoren
local.identifier.unepublicationidune:2455en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleThe role of feed supplements in improving intake and utilisation of low quality roughage in ruminantsen
local.output.categorydescriptionT2 Thesis - Doctorate by Researchen
local.thesis.borndigitalnoen
local.search.authorMigwi, Perminus Karubinen
local.search.supervisorGodwin, Ianen
local.search.supervisorNolan, Johnen
local.search.supervisorKhan, Lewisen
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/629ec791-2c65-456d-8c36-bcb67a1ca26den
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/024d4749-158a-4e81-b97b-8baee89df145en
local.uneassociationYesen
local.year.conferred2007en
local.fileurl.openhttps://rune.une.edu.au/web/retrieve/629ec791-2c65-456d-8c36-bcb67a1ca26den
local.fileurl.openhttps://rune.une.edu.au/web/retrieve/024d4749-158a-4e81-b97b-8baee89df145en
Appears in Collections:Thesis Doctoral
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