{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T03:21:26Z","timestamp":1785208886999,"version":"3.55.0"},"reference-count":46,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2025,1,2]],"date-time":"2025-01-02T00:00:00Z","timestamp":1735776000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Animal Physiology Nutrition"],"published-print":{"date-parts":[[2025,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Roughage can be a significant source of vitamin D in herbivore diets. The vitamin D content of forages can vary considerably and depends, among others, on plant species, plant maturity and climate fluctuations. Ultraviolet B (UVB) exposure causes conversion of provitamin D to vitamin D and thus represents the most important influence. To characterise this effect, two batches of a young\u2010cut roughage of high hygienic and nutritional quality were exposed to constant artificial UVB\u2010irradiation up to 192\u2009h and were sampled at regular intervals. In previous studies, both ergocalciferol (vitamin D<jats:sub>2<\/jats:sub>), cholecalciferol (vitamin D<jats:sub>3<\/jats:sub>) and\/or their metabolites have been detected in plants. Therefore, the present roughage was analysed for both D<jats:sub>2<\/jats:sub> and D<jats:sub>3<\/jats:sub>. Whereas cholecalciferol never exceeded the detection limit of 0.25\u2009\u00b5g\/100\u2009g, ergocalciferol increased from 2.22\u2009\u00b5g to 19.15\u2009\u00b5g\/100\u2009g dry matter in a time\u2010dependent manner. Additionally, the values indicate an interplay with other factors not investigated in this study, for example, leaf\u2010stem\u2010ratio in the different samples. The high amounts of ergocalciferol in the experimental roughage after UVB\u2010exposure confirm the value of hay as a vitamin D source for managed herbivores. The quick rise with time cautions against neglecting UVB\u2010irradiation's effect on feed, both in practical as well as in experimental settings.<\/jats:p>","DOI":"10.1111\/jpn.14094","type":"journal-article","created":{"date-parts":[[2025,1,2]],"date-time":"2025-01-02T10:05:02Z","timestamp":1735812302000},"page":"747-752","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The Potential of an Artificially Ultraviolet B Irradiated Hay as a Source of Vitamin D"],"prefix":"10.1111","volume":"109","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1166-9450","authenticated-orcid":false,"given":"Han","family":"Opsomer","sequence":"first","affiliation":[{"name":"Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty University of Zurich Zurich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3841-6207","authenticated-orcid":false,"given":"Marcus","family":"Clauss","sequence":"additional","affiliation":[{"name":"Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty University of Zurich Zurich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4292-8515","authenticated-orcid":false,"given":"Annette","family":"Liesegang","sequence":"additional","affiliation":[{"name":"Institute of Animal Nutrition and Dietetics, Vetsuisse Faculty University of Zurich Zurich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7043-7430","authenticated-orcid":false,"given":"Jean\u2010Michel","family":"Hatt","sequence":"additional","affiliation":[{"name":"Clinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty University of Zurich Zurich Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1231-7323","authenticated-orcid":false,"given":"Johanna","family":"M\u00e4kitaipale","sequence":"additional","affiliation":[{"name":"Department of Equine and Small Animal Medicine Faculty of Veterinary Medicine University of Helsinki Helsinki Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,1,2]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0168-9452(02)00420-X"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1753-4887.1986.tb07543.x"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/0377-8401(95)00885-3"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1152\/physrev.00014.2015"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0031-9422(01)00090-5"},{"key":"e_1_2_11_7_1","unstructured":"Daccord R. 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