000131216 001__ 131216
000131216 005__ 20240206154529.0
000131216 0247_ $$2doi$$a10.1016/j.livsci.2007.12.014
000131216 0248_ $$2sideral$$a66766
000131216 037__ $$aART-2008-66766
000131216 041__ $$aeng
000131216 100__ $$0(orcid)0000-0001-8056-5236$$aSolanas, E.
000131216 245__ $$aEffects of cereals and/or protein supplement extrusion on diet utilisation and performance of intensively reared cattle
000131216 260__ $$c2008
000131216 5203_ $$aThe effect of extruding the cereal and/or the protein supplement of a compound feed on its nutritive value and on the performance of intensively reared male calves was studied. The compound feed was formulated with 0.65 of a cereal blend (60:40 maize:barley), 0.25 of a protein blend (1/3:1/3:1/3 raw soybeans:peas:lupins), and 0.08 of urea to contain 0.17 of crude protein. It was tested without extruding (NE) and with the cereal blend (CE), the protein blend (PE) or both (CPE) extruded. Another non-extruded compound feed with mainly soybean meal as the protein supplement (NE-SBM) also was studied. The five experimental compound feeds together with barley straw were offered ad libitum to 50 male Friesian calves (112 kg initial live weight) for 13 weeks, recording individual feed intake and live weight gain. Crude protein (CP) solubility and in vitro and in situ CP degradation of experimental compounds, and in vitro gas production kinetics, in vivo digestibility and urinary allantoin excretion of diets were determined. Cereal extrusion promoted a greater gas production at all incubation times (p < 0.001), associated to the increase in starch gelatinisation. PE and NE-SBM compounds showed lower in vitro (p < 0.01) and in situ (p < 0.001) CP degradability than the other feeds. Ingredient extrusion did not affect apparent DM, OM and CP digestibilities, but diet CPE showed a lower NDF digestibility (p < 0.05) than the others (0.293 vs. 0.420, 0.387, 0.390 and 0.407 with CPE vs. NE, CE, PE and NE-SBM, respectively). The apparent EE digestibility increased (p = 0.053) with the inclusion of extruded ingredients, (0.799, 0.749 and 0.794 vs. 0.719 and 0.702 with CE, PE and CPE vs. NE and NE-SBM, respectively). Daily allantoin excretion was lower (p < 0.01) in calves receiving the CPE diet than in those receiving the NE, PE and NE-SBM diets. Treatments did not affect the average daily gains (1.61 ± 0.022 kg d− 1), however calves on the CPE diet showed a lower (p < 0.01) concentrate and total conversion ratios than those fed NE, PE and NE-SBM (2.60 vs. 2.79, 2.85 and 2.98 kg concentrate DM kg− 1 daily gain and 2.93 vs. 3.09, 3.13 and 3.26 kg total DM kg− 1 daily gain, respectively). The CE diet resulted in numerically higher (p > 0.05) concentrate and total DM conversion ratios (2.72 and 3.02) than CPE and lower (p < 0.05) than NE-SBM. Improvement in feed conversion ratio after extrusion would be related to a better starch utilisation and not to changes in microbial or dietary protein flow to the duodenum, although a better utilisation of fat energy cannot be disregarded.
000131216 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000131216 590__ $$a1.091$$b2008
000131216 591__ $$aAGRICULTURE, DAIRY & ANIMAL SCIENCE$$b20 / 45 = 0.444$$c2008$$dQ2$$eT2
000131216 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000131216 700__ $$0(orcid)0000-0002-9282-7974$$aCastrillo, C.$$uUniversidad de Zaragoza
000131216 700__ $$0(orcid)0000-0002-0712-1185$$aFondevila, M.$$uUniversidad de Zaragoza
000131216 700__ $$aRuiz Narvaez, Q.O.
000131216 700__ $$0(orcid)0000-0002-9463-0753$$aGuada, J.A.$$uUniversidad de Zaragoza
000131216 7102_ $$12008$$2700$$aUniversidad de Zaragoza$$bDpto. Produc.Animal Cienc.Ali.$$cÁrea Producción Animal
000131216 773__ $$g117, 2-3 (2008), 203-214$$pLivest. Sci.$$tLivestock Science$$x1871-1413
000131216 8564_ $$s185344$$uhttps://zaguan.unizar.es/record/131216/files/texto_completo.pdf$$yVersión publicada
000131216 8564_ $$s2140277$$uhttps://zaguan.unizar.es/record/131216/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000131216 909CO $$ooai:zaguan.unizar.es:131216$$particulos$$pdriver
000131216 951__ $$a2024-02-06-14:51:04
000131216 980__ $$aARTICLE