{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T19:35:12Z","timestamp":1790710512508,"version":"4.1.0"},"reference-count":78,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2022,8,8]],"date-time":"2022-08-08T00:00:00Z","timestamp":1659916800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Veterinary Sciences"],"abstract":"<jats:p>Using additives can reduce the negative effects of aging on factors affecting profitability, such as the availability of nutrients, production, and egg quality. Maca is an herbaceous plant rich in protein, crude oil, essential acids, and pharmacological compounds. Maca has positive effects on different health parameters. In this study, the effect of adding Maca powder to the diets of young and old laying quails at the end of the 10-week trial was investigated. In total, 150 laying Japanese quails (Coturnix japonica) (209.1 \u00b1 10.0 g) were randomly distributed to a 2 \u00d7 3 factorial arrangement with two ages (10 weeks and 30 weeks) and three Maca powder levels (0, 1, or 2 g\/kg), with five subgroups per treatment. According to the study, eggshell quality, total cholesterol, triglyceride, progesterone, and testosterone concentrations of serum were lower in old quail than in young quail, while egg weight, feed intake, and follicle-stimulating hormone increased significantly as quail aged. (p &lt; 0.05). Furthermore, aging negatively affected the histomorphology of the ileum and cortical bone thickness (p &lt; 0.05). Additional findings show that adding 1 g\/kg Maca powder to the diet of quail significantly improved eggshell, ileum, and bone traits that deteriorate with age, without affecting performance, and adding 2 g\/kg Maca powder to the diet significantly reduced serum total cholesterol levels (p &lt; 0.05). Incorporating Maca powder into the diet of aged birds could reduce the negative effects of aging.<\/jats:p>","DOI":"10.3390\/vetsci9080418","type":"journal-article","created":{"date-parts":[[2022,8,10]],"date-time":"2022-08-10T09:47:06Z","timestamp":1660124826000},"page":"418","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Use of Maca Powder (Lepidium meyenii) as Feed Additive in Diets of Laying Quails at Different Ages: Its Effect on Performance, Eggshell Quality, Serum, Ileum, and Bone Properties"],"prefix":"10.3390","volume":"9","author":[{"given":"Esra Tu\u011f\u00e7e","family":"G\u00fcl","sequence":"first","affiliation":[{"name":"Department of Animal Science, Faculty of Agriculture, University of Selcuk, Konya 42130, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3732-1137","authenticated-orcid":false,"given":"Osman","family":"Olgun","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Faculty of Agriculture, University of Selcuk, Konya 42130, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alp\u00f6nder","family":"Y\u0131ld\u0131z","sequence":"additional","affiliation":[{"name":"Department of Animal Science, Faculty of Agriculture, University of Selcuk, Konya 42130, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3493-1623","authenticated-orcid":false,"given":"Ahmet Engin","family":"T\u00fcz\u00fcn","sequence":"additional","affiliation":[{"name":"Kocarl\u0131 Vocational School, University of Ayd\u0131n Adnan Menderes, Ayd\u0131n 09970, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ainhoa","family":"Sarmiento-Garc\u00eda","sequence":"additional","affiliation":[{"name":"\u00c1rea de Producci\u00f3n Animal, Department of Construcci\u00f3n y Agronom\u00eda, Facultad de Ciencias Agrarias y Ambientales, Universidad de Salamanca, 37007 Salamanca, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"6187","DOI":"10.3382\/ps\/pez401","article-title":"Changes in the Quality of Eggs during Storage Depending on the Housing System and the Age of Hens","volume":"98","year":"2019","journal-title":"Poult. 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