Replacement of dicalcium phosphate by alternative Cuban sources: study of the dry matter digestibility and intake of Pelibuey lambs
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Abstract
order to validate them as substitutes of the imported product. The chemical composition of ?Trinidad de Guedes? phosphorite (TGP) was
evaluated regarding the amount of P and Ca as well as the solubility of theses elements in hydrochloric and citric acid. A 4x4 Latin square
experimental design was used to analyze the influence of the replacement of DP by phosphorite and rock with Pelibuey male lambs. Two levels of addition of the premixture with TGP, and one with ?Venegas? phosphoric rock. The TGP showed an 18 % of P and a 28 % of Ca. Its values of solubility were between 95.4 and 99.13 % for the P, and between 82.7 and 86 % for the Ca, in hydrochloric and citric acid, respectively. The animals showed, as average, consumptions of 1.09 kg of DM for the control, 0.96 and 0.98 kg for the treatments with TGP and 0.95 kg for the treatment with ?Venegas? phosphoric rock. During the two first treatments the values of DM digestibility obtained were of 40.63 and 48.75 %. During the last treatment the values were of 49.60 %, equally superior. The value of DM digestibility for the control treatment was 45.61 %. The TGP has acceptable values of P and Ca, and it can replace the DP from the mineral premixture of the feedstuff for lambs, without affecting the consumption and digestibility of DM.
Key words: Pelibuey, mineral premixture, feedstuff
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