{"id":57286,"date":"2026-05-11T14:40:04","date_gmt":"2026-05-11T14:40:04","guid":{"rendered":"https:\/\/matis.is\/?p=57286"},"modified":"2026-05-11T14:40:05","modified_gmt":"2026-05-11T14:40:05","slug":"nyting-hlidarafurda-ur-ylraekt-i-skordyrafodur","status":"publish","type":"post","link":"https:\/\/matis.is\/en\/skyrsla\/nyting-hlidarafurda-ur-ylraekt-i-skordyrafodur\/","title":{"rendered":"Utilization of by-products from animal husbandry in insect feed"},"content":{"rendered":"<p>Markmi\u00f0 verkefnisins var a\u00f0 kanna m\u00f6guleika \u00e1 a\u00f0 n\u00fdta hli\u00f0arafur\u00f0ir \u00far \u00edslenskri ylr\u00e6kt sem f\u00f3\u00f0ur fyrir mj\u00f6lorma (<em>Tenebrio molitor<\/em>). Framkv\u00e6mdar voru f\u00f3\u00f0urtilraunir \u00fear sem mj\u00f6lormar fengu hveiti \u00e1samt gulr\u00f3tum sem vi\u00f0mi\u00f0unarf\u00f3\u00f0ur, hveiti \u00e1samt g\u00farkubl\u00f6\u00f0um e\u00f0a hveiti \u00e1samt t\u00f3matbl\u00f6\u00f0um. Jafnframt voru framkv\u00e6mdar m\u00e6lingar \u00e1 n\u00e6ringargildi, gl\u00fdk\u00f3alkal\u00f3\u00ed\u00f0um, \u00feungm\u00e1lmum og \u00f6\u00f0rum snefilefnum, varnarefnaleifum og \u00f6rverum \u00ed f\u00f3\u00f0ri og frost\u00feurrku\u00f0um lirfum. Ni\u00f0urst\u00f6\u00f0urnar s\u00fdndu a\u00f0 f\u00f3\u00f0urtegund haf\u00f0i greinileg \u00e1hrif \u00e1 v\u00f6xt, lifun og frj\u00f3semi mj\u00f6lormanna. G\u00farkubl\u00f6\u00f0 reyndust hagst\u00e6\u00f0asta hr\u00e1efni\u00f0 af \u00feeim sem pr\u00f3fu\u00f0 voru og g\u00e1fu meiri framlei\u00f0slu lirfa, betri v\u00f6xt og h\u00e6rra pr\u00f3teinhlutfall \u00ed lokaafur\u00f0 en vi\u00f0mi\u00f0unarf\u00f3\u00f0ri\u00f0. T\u00f3matbl\u00f6\u00f0 reyndust hins vegar s\u00ed\u00f0ur hentug, \u00fear sem \u00feau tengdust minni vexti, h\u00e6rri d\u00e1nart\u00ed\u00f0ni og l\u00e6gri frj\u00f3semi. M\u00e6lingar \u00e1 gl\u00fdk\u00f3alkal\u00f3\u00ed\u00f0um s\u00fdndu a\u00f0 \u03b1-t\u00f3mat\u00edn var \u00ed h\u00e1um styrk \u00ed t\u00f3matbl\u00f6\u00f0um en \u00ed mun l\u00e6gra magni \u00ed lirfum eftir uppskeru, sem bendir til \u00feess a\u00f0 mj\u00f6lormarnir geti broti\u00f0 efni\u00f0 ni\u00f0ur a\u00f0 hluta, \u00fe\u00f3 ekki a\u00f0 fullu. Varnarefnaleifar fundust ekki \u00ed s\u00fdnum og magn \u00feungm\u00e1lma var almennt l\u00e1gt, \u00fe\u00f3 kadm\u00edn \u00ed lirfum gefi tilefni til \u00e1framhaldandi eftirlits. <em>Listeria monocytogenes<\/em> and <em>Salmonella<\/em> greindust ekki \u00ed lokaafur\u00f0, en heildarfj\u00f6ldi lofth\u00e1\u00f0ra \u00f6rvera var yfir vi\u00f0mi\u00f0unarm\u00f6rkum \u00ed \u00f6llum s\u00fdnum. Ni\u00f0urst\u00f6\u00f0urnar benda \u00fev\u00ed til \u00feess a\u00f0 g\u00farkubl\u00f6\u00f0 s\u00e9u \u00e1litlegt hr\u00e1efni \u00ed f\u00f3\u00f0ur fyrir mj\u00f6lorma, en a\u00f0 ekki s\u00e9 h\u00e6gt a\u00f0 m\u00e6la me\u00f0 notkun t\u00f3matbla\u00f0a vi\u00f0 \u00fe\u00e6r a\u00f0st\u00e6\u00f0ur sem rannsaka\u00f0ar voru \u00ed verkefninu. Jafnframt er lj\u00f3st a\u00f0 frekari \u00fer\u00f3un \u00e1 vinnslu, me\u00f0h\u00f6ndlun og \u00f6rveru\u00f6ryggi er nau\u00f0synleg \u00e1\u00f0ur en sl\u00edk framlei\u00f0sla ver\u00f0ur tekin upp \u00e1 st\u00e6rri skala.<br>_____<br>The aim of the project was to evaluate the potential of using by-products from Icelandic greenhouse horticulture as feed for yellow mealworms <em>(Tenebrio molitor).<\/em> Feeding trials were carried out using wheat supplemented with carrots as a reference feed, cucumber leaves, or tomato leaves. In addition, analyses were performed on nutritional composition, glycoalkaloids, heavy metals and other trace elements, pesticide residues, and microbiological quality in both feed materials and freeze-dried larvae. The results showed that feed type had a clear effect on mealworm growth, survival, and fertility. Cucumber leaves were the most promising raw material tested, resulting in higher larval production, better growth, and higher protein content in the final product than the reference feed. Tomato leaves were less suitable, being associated with reduced growth, higher mortality, and lower fertility. Glycoalkaloid analyses showed that \u03b1-tomatine was present at a high level in tomato leaves but at a much lower level in harvested larvae, indicating partial but incomplete degradation by the mealworms. No pesticide residues were detected, and heavy metal levels were generally low, although cadmium detected in the larvae indicates a need for continued monitoring. Listeria monocytogenes and Salmonella were not detected in the final product, whereas total aerobic counts were above reference limits in all samples. Overall, the findings indicate that cucumber leaves are a promising feed ingredient for mealworms, whereas tomato leaves cannot be recommended under the conditions tested in this project. Further work on processing, handling, and microbiological safety is needed before this type of production can be implemented on a larger scale.<br><br><\/p>","protected":false},"excerpt":{"rendered":"<p>Markmi\u00f0 verkefnisins var a\u00f0 kanna m\u00f6guleika \u00e1 a\u00f0 n\u00fdta hli\u00f0arafur\u00f0ir \u00far \u00edslenskri ylr\u00e6kt sem f\u00f3\u00f0ur fyrir mj\u00f6lorma (Tenebrio molitor). Framkv\u00e6mdar [&hellip;]<\/p>\n","protected":false},"author":7,"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":[2247,580,2598,2593,2597,2599,258,2600,2595,2594,2596],"class_list":["post-57286","post","type-post","status-publish","format-standard","hentry","category-skyrsla","tag-circular-economy","tag-food-safety","tag-greenhouse-horticultural-by-products","tag-hlidarafurdir-ur-ylraekt","tag-hringrasarhagkerfi","tag-insect-feed","tag-matvaelaoryggi","tag-mealworms","tag-mjolormar","tag-skordyrafodur","tag-tenebrio-molitor"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>N\u00fdting hli\u00f0arafur\u00f0a \u00far ylr\u00e6kt \u00ed skord\u00fdraf\u00f3\u00f0ur - Mat\u00eds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/matis.is\/en\/skyrsla\/nyting-hlidarafurda-ur-ylraekt-i-skordyrafodur\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"N\u00fdting hli\u00f0arafur\u00f0a \u00far ylr\u00e6kt \u00ed skord\u00fdraf\u00f3\u00f0ur - Mat\u00eds\" \/>\n<meta property=\"og:description\" content=\"Markmi\u00f0 verkefnisins var a\u00f0 kanna m\u00f6guleika \u00e1 a\u00f0 n\u00fdta hli\u00f0arafur\u00f0ir \u00far \u00edslenskri ylr\u00e6kt sem f\u00f3\u00f0ur fyrir mj\u00f6lorma (Tenebrio molitor). 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