Markmi\u00f0 verkefnisins voru (1) a\u00f0 kanna hva\u00f0a \u00e1hrif mismunandi kornskammtar, 0%, 21% e\u00f0a 37% af heildarf\u00f3\u00f0ri fyrir holdablendinga hef\u00f0u \u00e1 g\u00e6\u00f0i og eiginleika nautakj\u00f6ts, (2) a\u00f0 bera saman g\u00e6\u00f0i og eiginleika kj\u00f6ts af \u00edslenskum nautum vi\u00f0 holdablendinga sem h\u00f6f\u00f0u fengi\u00f0 s\u00f6mu me\u00f0fer\u00f0 og f\u00f3\u00f0run. A\u00f0 auki var verkefninu \u00e6tla\u00f0 a\u00f0 afla uppl\u00fdsinga um kr\u00f6fur og upplifun neytenda af \u00edslensku nautakj\u00f6ti. \u00edslensku nautakj\u00f6ti.<\/p>\n\n\n\n
S\u00fdni til m\u00e6linga voru hryggv\u00f6\u00f0var af gripum \u00far f\u00f3\u00f0urtilraun sem h\u00f6f\u00f0u fengi\u00f0 uppeldi eftir ofangreindri f\u00f3\u00f0ursamsetningu \u00fear til \u00feeir n\u00e1\u00f0u um 350 kg fall\u00feunga a\u00f0 me\u00f0altali. Sl\u00e1turaldur gripanna \u00ed kj\u00f6tg\u00e6\u00f0aranns\u00f3kninni var \u00e1 bilinu 15,9-27,5 m\u00e1nu\u00f0ir. Gripum var skipt upp \u00ed 4 h\u00f3pa sem hver taldi 12 naut. Einn h\u00f3pur var af \u00edslenska k\u00faakyninu en hinir \u00fer\u00edr voru holdablendingar (alls 48 gripir). T\u00f6luver\u00f0ur breytileiki var \u00ed erf\u00f0asamsetningu holdablendinganna en vali\u00f0 var \u00ed h\u00f3pa eftir erf\u00f0agreiningu til \u00feess a\u00f0 l\u00e1gmarka breytileika vegna k\u00faakyns eins og kostur var. Me\u00f0alt\u00f6l fyrir kyn holdablendingsh\u00f3pana voru; 21% \u00edsl. k\u00faakyn, 34% Angus, 41% Galloway og 3% Limosin.<\/p>\n\n\n\n
Eftirfarandi m\u00e6lingar voru ger\u00f0ar: Erf\u00f0agreining, s\u00fdrustig, sj\u00f3nmat \u00e1 fitusprengingu, sj\u00f3nmat \u00e1 lit, efnam\u00e6ling innanv\u00f6\u00f0vafitu, \u00e1fer\u00f0arm\u00e6ling \u00e1 hr\u00e1u og eldu\u00f0u kj\u00f6ti me\u00f0 WBSF a\u00f0fer\u00f0, su\u00f0ur\u00fdrnun, fitus\u00fdrugreining, skynmat og neytendapr\u00f3f \u00e1samt \u00fev\u00ed a\u00f0 mynd var tekin af snei\u00f0 \u00e1 sama sta\u00f0 \u00far hryggv\u00f6\u00f0va fr\u00e1 hverjum einasta grip.<\/p>\n\n\n\n
Greinilegur munur var \u00e1 hryggv\u00f6\u00f0va nauta af \u00edslenska k\u00faakyninu annars vegar og holdablendinga hins vegar (sem allir h\u00f6f\u00f0u fengi\u00f0 sama f\u00f3\u00f0ur (21% korn) og s\u00f6mu me\u00f0fer\u00f0) Vaxtahra\u00f0i holdablendinganna var meiri \u00fear sem me\u00f0alaldur \u00edslensku gripanna vi\u00f0 sl\u00e1trun var um 8 m\u00e1nu\u00f0um h\u00e6rri en holdablendinganna. Holdablendingarnir m\u00e6ldust me\u00f0 h\u00e6rra hlutfall innanv\u00f6\u00f0vafitu (fitusprenging), l\u00e6gra hlutfall fj\u00f6l\u00f3metta\u00f0ra fitus\u00fdra, h\u00e6rra hlutfall metta\u00f0ra fitus\u00fdra, s\u00e6tara brag\u00f0, m\u00fdkri \u00e1fer\u00f0, meyrara kj\u00f6t og skoru\u00f0u h\u00e6rra fyrir alla \u00fe\u00e6tti \u00ed neytendapr\u00f3fum. Neytendum fannst kj\u00f6t af \u00edslenska k\u00faakyninu vera af hversdagslegum g\u00e6\u00f0um en kj\u00f6t af holdablendingum hafa meira en hversdagsleg g\u00e6\u00f0i.<\/p>\n\n\n\n
\u00c1hrif aukins kornhlutfalls \u00ed f\u00f3\u00f0ri holdablendinga \u00e1 hryggv\u00f6\u00f0va voru: aukinn vaxtahra\u00f0i, l\u00e6kkun sl\u00e1turaldurs, aukin innanv\u00f6\u00f0vafita, lj\u00f3sari kj\u00f6tlitur, meiri fitusprenging, h\u00e6kka\u00f0 hlutfall Omega 6 fitus\u00fdra, l\u00e6kka\u00f0 hlutfall Omega 3 fitus\u00fdra og j\u00e1kv\u00e6\u00f0ari \u00e1hrif \u00e1 upplifun neytenda \u00fe.e. kj\u00f6t af holdablendingum var safar\u00edkara og meyrara, haf\u00f0i betra brag\u00f0 og meiri g\u00e6\u00f0i. \u00c1hrif \u00e1 kj\u00f6tmat voru engin og munur milli f\u00f3\u00f0urh\u00f3pa me\u00f0 skynmati var ekki markt\u00e6kur \u00fe\u00f3 svo a\u00f0 fylgni hafi veri\u00f0 vi\u00f0 ni\u00f0urst\u00f6\u00f0ur \u00far neytendapr\u00f3funum.
Helstu \u00e1hrifa\u00fe\u00e6ttir \u00e1 kj\u00f6tg\u00e6\u00f0i og upplifun neytenda voru sl\u00e1turaldur og innanv\u00f6\u00f0vafita (fitusprenging). \u00de\u00e1 var einstaklingsbreytileiki meiri innan \u00edslenska k\u00faakynsins en hj\u00e1 holdablendingum.<\/p>\n\n\n\n
Uppl\u00fdsingar \u00far verkefninu munu n\u00fdtast vi\u00f0 f\u00f3\u00f0urr\u00e1\u00f0gj\u00f6f til b\u00e6nda. \u00dear a\u00f0 auki vir\u00f0ist vera tilefni til \u00feess a\u00f0 s\u00e9rmerkja og marka\u00f0setja eftir frekari a\u00f0greiningu \u00edslenskt nautakj\u00f6t til a\u00f0 tryggja st\u00f6\u00f0ugri g\u00e6\u00f0i til neytenda me\u00f0 h\u00e6rra ver\u00f0i og meiri ar\u00f0semi \u00ed huga. \u00de\u00e1 g\u00e6ti sl\u00edk a\u00f0ger\u00f0 b\u00e6tt marka\u00f0st\u00f6\u00f0u og samkeppnish\u00e6fni nautakj\u00f6ts af \u00edslenskum holdablendingum. \u00cd \u00fev\u00ed sambandi v\u00e6ri einnig \u00e1hugavert a\u00f0 fara \u00ed frekari ranns\u00f3kn \u00e1 yngri hreinr\u00e6ktu\u00f0um \u00edslenskum nautum og bera \u00feau saman vi\u00f0 holdablendinga \u00e1 sama aldri.<\/p>\n\n\n\n
Verkefni\u00f0 var styrkt af Matv\u00e6lasj\u00f3\u00f0i. Samstarfsa\u00f0ilar voru Hofsta\u00f0sel (Sel ehf.), Kj\u00f6tafur\u00f0ast\u00f6\u00f0 Kaupf\u00e9lags Skagfir\u00f0inga (KS), \u00cdslandsnaut (Ferskar kj\u00f6tv\u00f6rur), R\u00e1\u00f0gjafami\u00f0st\u00f6\u00f0 Landb\u00fana\u00f0arins (RML), Landb\u00fana\u00f0arh\u00e1sk\u00f3li \u00cdslands (LBH\u00cd) og Mat\u00eds ohf.<\/em> Loin muscles of carcases of the young bulls of approximately 350 kg carcass weight were sampled. The age at slaughter ranged from 15,9 to 27,5 months.<\/p>\n\n\n\n Some variation was in the genomic composition of the bulls from the mixed breed. It was on average 21% Icelandic dairy breed, 34% Aberdeen Angus, 41% Galloway and 3% Limousin. Care was taken to minimize the effects of the variation when the bulls were divided between treatments.<\/p>\n\n\n\n The loin muscles were analysed for: pH24, visual marbling and colour score, % intramuscular fat and fatty acid composition, Warner Bratzler shear force of raw and cooked meat, cooking loss, colour, odour, flavour and texture using trained sensory panel and consumer perception and preferences.<\/p>\n\n\n\n Increased barley led to increased growth rate in grammes of meat per day and lower slaughter age. It increased both visual marbling score and % intramuscular fat (1,78 to 4,32). It increased the percentage of Omega 6 fatty acids and decreased the amount of Omega 3 fatty acids in the intramuscular fat (g\/100 g IMF). It had a positive effect of consumer perception and preferences with the meat being juicier, more tender and softer and of higher quality with increased barley in the feed. The differences in sensory properties were not significant but there was however a good correlation with the consumers scores. Increased barley did however not influence EU conformation and fat cover grading of carcases. Information from the project can be used by consultants and individual farmer and processors when considering producing high quality meat. There should be an opportunity to produce especially labelled, higher priced meat of consistent and high quality to consumers. It would improve marketing and competitiveness of meat form mixed meat breeds. Markmi\u00f0 verkefnisins voru (1) a\u00f0 kanna hva\u00f0a \u00e1hrif mismunandi kornskammtar, 0%, 21% e\u00f0a 37% af heildarf\u00f3\u00f0ri fyrir holdablendinga hef\u00f0u \u00e1 […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[15],"tags":[2524,2519,2521,2523,2522,2243,2240,2525,2520,2526],"class_list":["post-54772","post","type-post","status-publish","format-standard","hentry","category-skyrsla","tag-barley-feed","tag-byggfodrun","tag-holdablendingar","tag-icelandic-dairy-breed","tag-islenska-kuakynid","tag-kjotgaedi","tag-meat-quality","tag-mixed-breed","tag-ungneyti","tag-young-bulls"],"acf":[],"yoast_head":"\n
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The effects of increased ratio of barley (0%\/21%\/37%) in roughage feed of young bulls of a mixed meat breed on meat quality were studied and compared to the quality of meat of young bulls from the Icelandic dairy breed. The aim was also to gather information on consumer perception of the meat. Twelve young bulls were in each of the four treatments.<\/p>\n\n\n\n
Big differences were between the meat of the Icelandic dairy breed and the meat of the mixed meat breed young bulls that were fed in the same way (21% barley). The bulls of the mixed breed were slaughtered 8 months younger on average and their growth rate was much higher. The intramuscular fat of the loin muscle of the mixed breed was much higher (3,82 vs 1,78) as well as the visual marbling score. It had lower percentage of Omega 3 fatty acids and higher percentage of Omega 6 fatty acids. The meat tasted sweeter and was more tender, softer and scored higher in all the attributes of the consumer perception and preferences. The meat of the Icelandic dairy breed was on average of \u201ceveryday quality\u201d whereas the meat of the mixed meat breed was of \u201cmore than everyday quality\u201d. Age at slaughter, visual marbling score, % intramuscular fat were the independent factors with the best correlation to the evaluation of the consumers. More individual variation was in consumer evaluation within the Icelandic dairy group than the mixed meat breed groups. <\/p>\n\n\n\n
The project was supported by Matv\u00e6lasj\u00f3\u00f0ur. Project Partners:\u00a0 Hofsta\u00f0sel (Sel ehf.), Kj\u00f6tafur\u00f0ast\u00f6\u00f0 Kaupf\u00e9lags Skagfir\u00f0inga (KS), \u00cdslandsnaut (Ferskar kj\u00f6tv\u00f6rur), R\u00e1\u00f0gjafami\u00f0st\u00f6\u00f0 Landb\u00fana\u00f0arins (RML), Landb\u00fana\u00f0arh\u00e1sk\u00f3li \u00cdslands (LBH\u00cd) og Mat\u00eds ohf.<\/em><\/p>","protected":false},"excerpt":{"rendered":"