150635 20260203074033.0 doi 10.1111/asj.70033 sideral 142784 ART-2025-142784 eng (orcid)0000-0001-6445-849X Álvarez-Rodríguez, Javier Universidad de Zaragoza Dietary Protein Reduction in Lean Pigs From Pietrain Paternal Line Under Commercial Setting: An Interplay Between Nitrogen Efficiency and Meat Attributes 2025 A trial was conducted to research the impact of reducing dietary crude protein (CP) levels from 14.8% to 12.6% in the finishing diet (90–120 kg of body weight) of lean pigs, with an essential AA supply (8.8 g Lys, 2.1 g Met, 6.7 g Thr, 5.5 g Ile, and 6.7 g Val, per kilogram of feed) in intact males and females under commercial setting. The productive performances and nitrogen (N) balance, blood markers related to protein metabolism, apparent digestibility of nutrients, carcass, and meat quality were evaluated. This dietary CP restriction did not impair the growth performances, decreased the N excretion, and did not affect the apparent digestibility of most nutrients, except phosphorus digestibility, which was reduced in the low‐CP diet. The responses to this dietary CP restriction were independent of sex, except the serum urea concentration and total proteins, which were only steadily reduced in intact males fed the low‐CP diet. The low‐CP diet reduced the nutritional pork quality by increasing the moisture content, although the technological characteristics of meat were not affected. Further studies are required to improve the sex‐tailored feeding strategies for high‐conformed lean pigs in an environmentally friendly context. info:eu-repo/grantAgreement/ES/UZ/OTRI-2019-0134 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0002-5569-0219 Vigo-Morancho, Alba Universidad de Zaragoza (orcid)0000-0001-5981-5448 Miana-Mena, Francisco Javier Universidad de Zaragoza Pérez-Ciria, Leticia (orcid)0000-0002-3005-2675 Latorre, Maria Angeles Universidad de Zaragoza 1012 410 Universidad de Zaragoza Dpto. Farmac.Fisiol.y Med.L.F. Área Fisiología 5011 500 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Area Ingeniería Agroforestal 2008 700 Universidad de Zaragoza Dpto. Produc.Animal Cienc.Ali. Área Producción Animal 96, 1 (2025), e70033 [12 pp.] Anim. sci. j. Animal Science Journal 1344-3941 337747 http://zaguan.unizar.es/record/150635/files/texto_completo.pdf Versión publicada info:eu-repo/date/embargoEnd/2026-02-02 2344231 http://zaguan.unizar.es/record/150635/files/texto_completo.jpg?subformat=icon icon Versión publicada info:eu-repo/date/embargoEnd/2026-02-02 oai:zaguan.unizar.es:150635 articulos driver 2026-02-02-14:49:02 ARTICLE