Determination of the malting and milling performance of sorghum cultivars

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dc.contributor.advisorOsthoff, G.
dc.contributor.advisorPretorius, A. J.
dc.contributor.authorVan Loggerenberg, Magdalena
dc.date.accessioned2018-02-21T10:01:22Z
dc.date.available2018-02-21T10:01:22Z
dc.date.issued2001-05
dc.description.abstractEnglish: Consumer demands for sorghum food acceptability stress the need for quality evaluation of milled and malted products. The aim of this study was to determine the milling and malting quality of sorghum cultivars with different physical and chemical qualities. The malting, physical and milling qualities of 24 sorghum cultivars were investigated over 2 seasons at 3 localities per season. The most important malting quality parameters that were identified with the canonical variate analysis were free amino nitrogen, diastatic power, germinative energy and vigour, compared to polyphenols, malting loss and water absorption that was identified as less important. From the canonical variate analysis, the most important physical qualities measured were sieve . fraction large, hundred kernel weight, water absorption and moisture content and were used to predict milling quality, while sieve fraction medium and small and meal fractions were found to be less important. Food quality properties were determined from roller and abrasive decortication milled meal. The abrasive hardness index, dehulling index and viscosity were important abrasive decortication milling parameters, with break 2 bran, break 1 bran, L-values, extraction, break 2 meal, break 1 meal and break 2 grits being important roller milling parameters. The best malting cultivars were APN 881, NK 286, PAN 8446, PAN 8660, SNK 3443, SNK 3337, SNK 3663, SNK 3939, SNK 3975, PAN 8564, NS 5655, SNK 3860 and NS 5511. Cultivars with the best physical properties were SNK 3939, SNK 3663, PAN 8061, PAN 8564, PAN 8171, SNK 3443, PAN 8446, SNK 3337, NK 286, APN 881, SNK 3883, SNK 3975, SNK 3567, PAN 8272 and PAN 8370. Good abrasive decortication milling property cultivars were APN 881, SNK 3567, SNK 3863, NK 286, ADV 5010, PAN 8564, SNK 3443, PAN 8370 and PAN 8660. Good roller milling cultivars were SNK 3883, SNK 3939, PAN 8564, NK 286 and SNK 3975. Cultivars with multi-functions were NK 286, PAN 8564 APN 881, SNK 3443, PAN 8660, SNK 3939, NS 5655 and SNK 3975 (good malting and milling).en_ZA
dc.description.abstractAfrikaans: Die behoefte aan kwaliteitsevaluering van sorghum vermoute- en gemaalde produkte word onderstreep deur verbruikersbehoeftes aan aanvaarbare sorghum voedselprodukte. Die doel van die studie was om die mout- en maalkwaliteit van sorghumkultivars met verskillende fisiese en chemise eienskappe, te ondersoek Die mout-, fisiese- en maalkwaliteite van 24 sorghurnkultivars is ondersoek oor 2 seisoene en by 3 lokaliteite per seisoen. Die belangrikste moutkwaliteitsparameters wat met behulp van. die kanononiese variansieanalise geidentifiseer is, was vry aminostikstof, diastatiese vermoë, kiemkapasiteit en -energie, in vergelyking met polifenole, moutverlies en wateropname wat as minder belangrik geidentifiseer is. Vanuit die kanoniese variansieanslise is siffraksie (groot), honderdpitmassa, waterabsorpsie en voginhoud as die belangrike fisiese eienskappe bepaal en is gebruik vir maalkwaliteitsvoorpellings, teenoor siffraksie (medium en klein) en meelfraksies wat minder belangrik geag is. Roller- en afslyp vermaling is uitgevoer en meel se voedselkwaliteitseienskappe is bepaal. Die afslyphardheidsindeks, afslypindeks en viskositeit was belangrike afslypvermaling maaleienskappe en vir die rollermeule was breuk 1 semel en -meel, breuk 2 semel, -meel en -gruis, ekstraksie en siffraksies belangrik in vergelyking met totale verlies, siffraksie 1, siffraksie 2 en die wat deur die sif gegaan het, soos met behulp van die kanoniese variansieanalise bepaal. APN 881, NK 286, PAN 8446, PAN 8660, SNK 3443, SNK 3337, SNK 3663, SNK 3939, SNK 3975, PAN 8564, NS 5655, SNK 3860 en NS 5511 was die beste moutkultivars. Kultivars met die beste fisiese kwaliteit was SNK 3939, SNK 3663, PAN 8061, PAN 8564, PAN 8171, SNK 3443, PAN 8446, SNK 3337, NK 286, APN 881, SNK 3883, SNK 3975, SNK 3567, PAN 8272 en PAN 8370. APN 881, SNK 3567, SNK 3863, NK 286, ADV 5010, PAN 8564, SNK 3443, PAN 8370 en PAN 8660 het goeie afslypvermalingseienskappe gehad. SNK 3883, SNK 3939, PAN 8564 en NK 286 was die beste rollermeulekultivars. Sommige kultivars het meer as een funksie, naamlik NK 286, PAN 8564 APN 881, SNK 3443, PAN 8660, SNK 3939 en NS 5655 (goeie mout- en maaleienskappe)en_ZA
dc.description.sponsorshipAgricultural Research Councilen_ZA
dc.identifier.urihttp://hdl.handle.net/11660/7848
dc.language.isoenen_ZA
dc.publisherUniversity of the Free Stateen_ZA
dc.rights.holderUniversity of the Free Stateen_ZA
dc.subjectSorghumen_ZA
dc.subjectMaltingen_ZA
dc.subjectPhysical propertiesen_ZA
dc.subjectTangential abrasive dehulling deviceen_ZA
dc.subjectRoller millingen_ZA
dc.subjectDiastatic poweren_ZA
dc.subjectGerminationen_ZA
dc.subjectAbrasion/dehullingen_ZA
dc.subjectBreak millsen_ZA
dc.subjectMilling lossesen_ZA
dc.subjectViscosityen_ZA
dc.subjectSorghum -- Millingen_ZA
dc.subjectSorghum -- Processingen_ZA
dc.subjectDissertation (M.Sc.Agric (Food Science))--University of the Free State, 2001en_ZA
dc.titleDetermination of the malting and milling performance of sorghum cultivarsen_ZA
dc.typeDissertationen_ZA
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