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dc.contributor.authorÁlvarez Rodríguez, Javier
dc.contributor.authorMir, L.
dc.contributor.authorSeradj, Ahmad Reza
dc.contributor.authorMorazán Nuñez, Henris Jobany
dc.contributor.authorBalcells Terés, Joaquim
dc.contributor.authorBabot Gaspa, Daniel
dc.date.accessioned2018-11-19T09:26:09Z
dc.date.available2018-11-19T09:26:09Z
dc.date.issued2017-09-15
dc.identifier.issn0931-2439
dc.identifier.urihttp://hdl.handle.net/10459.1/65131
dc.description.abstractTwelve lactating sows were used to evaluate the effects of reducing dietary crude protein (CP) (14% vs. 12%) and increasing neutral detergent fibre (NDF) levels (18% vs. 22%) on litter performance, total tract apparent digestibility and manure composition in a 4 9 4 latin square arrangement during a 36-day lactation period. Diets were isoenergetic (2.9 Mcal ME/kg) and had similar total lysine content (0.9%). In addition, a second aim was to compare a reference external marker method (Cr2O3) with an internal feed marker [acid-insoluble ash (AIA)] for the calculation of apparent total tract digestibility of nutrients in lactating sows. The reduction of dietary CP level in lactating sows had no effect on either live-weight or backfat thickness or apparent total tract digestibility of nutrients. However, the piglets’ average daily gain (ADG) was reduced in low dietary CP diets, which suggests that sows reduced milk production due to an underestimation of certain essential amino acid requirements (e.g. valine). The increase of dietary NDF level did not affect sow and litter performance. Nevertheless, the total tract apparent digestibility of organic matter, CP and carbohydrates was reduced, and ether extract digestion was increased in high NDF compared to normal NDF diets equally balanced for ME and lysine content. The coefficients of total tract apparent digestibility of nutrients in lactating sows were greater when using AIA compared to Cr2O3 marker, regardless of dietary CP or NDF level, but their coefficients of variation were lower in the former than in the latter. In lactating sows, a trade-off between litter performance and nutrient digestion is established when reducing dietary CP or increasing NDF levels while maintaining similar lysine content through synthetic amino acids and balancing metabolizable energy through dietary fat sources.
dc.description.sponsorshipThis work was supported by the Ministry of Economy and Competitiveness of Spain and the European Union Regional Development Funds (AGL2010- 20820). The authors wish to thank the staff of the Centre d’Estudis Porcins (CEP Diputaci o de Lleida) and Indira Medina for their technical assistance during sample collection. In addition, the collaboration of Lorenzo Fraile for pharmacological oestrus synchronization of gilts is acknowledged
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherWiley
dc.relationMICINN/PN2008-2011/AGL2010-20820
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1111/jpn.12523
dc.relation.ispartofJournal of Animal Physiology and Animal Nutrition, 2017, vol. 101, p. 914-924
dc.rights(c) Blackwell Verlag GmbH, 2016
dc.subjectSwine
dc.subjectFeed formulation
dc.subjectNutrient requirements
dc.subjectNutrient excretion
dc.titleNutritional strategies to cope with reduced litter weight gain and total tract digestibility in lactating sows
dc.typeinfo:eu-repo/semantics/article
dc.date.updated2018-11-19T09:26:09Z
dc.identifier.idgrec025952
dc.type.versionacceptedVersion
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.identifier.doihttps://doi.org/10.1111/jpn.12523


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