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- W2269238743 abstract "In order to determine the effect of different phosphorus sources ongrowth, bone mineralization, and phosphorus retention in birds, 440male chicks of the commercial hybrid Cobb x Cobb, one day born, fed upto the fourth week on age, were distributed in five treatments, in acompletely randomized design, using a factorial arrangement 5 x 2 (5phosphorus sources, 2 levels of phosphorus additions), with fourreplications with 10 birds each. Phosphorus sources were calcinatedbone (HHC), a fertilizer, triple superphosphate (SFT), and three rawrock phosphates, Riecito (RIO), Lizardo (LIZA), and Jaji (JAJI).Phosphates were added to a basal diet (0.35% P) at two phosphoruslevels (0.25 and 0.50%). Diets contained 3,100 kcal ME/kg, 23.5% CP,with a constant calcium level (1%). Body weight and feed intake weremeasured. Four birds per treatment were sacrificed to take both tibiasto determine density, ash, and phosphorus. A balance technique was usedto determine phosphorus net retention and utilization efficiency. Bodyweight (g/bird) at 0.25 and 0.50% P levels was greater (P<0.05) forSFT, followed by HHC, intermediate for RIO and JAJI and lower for LIZA,with values of 813 and 805, 747 and 745, 436 and 760, 393 and 661 and,286 and 415, respectively, for treatments and levels. RIO phosphate wassimilar to HHC and SFT when added at 0.50% phosphorus level.Differences between levels were significant (P<0.05) only forsedimentary phosphates. Feed intake and feed efficiency showed similartendency in relation to body weight. Bone ash content (%) for 0.25 and0.50% added phosphorus, was higher (P< 0,05) for SFT followed byHHC, RIO, LIZA and JAJI, with values of 40.7 and 45.5, 38.7 and 43.7,36.8 and 42.4, 35.0 and 40.1, and 33.2 and 38.2, respectively forphosphates and levels. Bone ash content expressed in mg/cm3 presentedsimilar tendency to the percent expression. There were not differencesin bone phosphorus content and values ranged were between 16.8 and18.5%. Apparent phosphorus net retention (%) for 0.25 and 0.50% addedphosphorus was greater (P<0.05) for SFT, followed by HHC, RIO, andLIZA and lower for JAJI, with values 76.4 and 73.7, 71.8 and 69.3, 71.5and 65.5, 69.4 and 66.2, and 62.7 and 58.6%, respectively for the sameorder of treatments and levels. Phosphorus utilization efficiency (%)was greater for SFT (66.7) and HHC (63.1), followed by RIO (61.5) andLIZA (62.0) and lower for JAJI (57.0). It is concluded that sedimentaryphosphates had variable limitations, depending upon deposit origin, forgrowing chicks feeding and that absorption measures showed similartendency as body weight and bone mineralization, in relation to abetter response for SFT, followed of HHC, RIO, LIZA and JAJI." @default.
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- W2269238743 date "2008-04-14" @default.
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- W2269238743 title "Growth and bone mineralization in chicken broilers fed with nationalphosphates" @default.
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