Resumen

ARIAS, Adelis; GODOY, Susmira; PIZZANI, Pablo  y  CHICCO, Claudio. Validaton of productive response and bone mineralization in chicken fed with urea phosphate (up) in the feed and water. Rev. Cient. (Maracaibo) [online]. 2008, vol.18, n.4, pp.408-414. ISSN 0798-2259.

To validate urea phosphate (UP) as phosphorus source for birds, 320 chickens, were distributed in four treatments according to an completely randomized design. In growing: T1: DICAL. T2: UP, T3: UP4 y T4: BASAL. In Fattening: T1: DICAL, T2: UP, T2a: BASAL + UP water, T2b: BASAL, T3: UP4, T3a: BASAL + UP water, T3b: BASAL and T4: BASAL. Diets containing 22 and 20% PC, 3,100 and 3,200 Kcal EME/kg, 0.7 and 0.67% total P and 1 to 0.90% Ca, for starting and growing, respectively. Body weight, feed and water intake were measured weekly and feed conversion. At four and six weeks were estimate density, P and ash in bone. Body weight at week 4 resulted elevated (P <0.05) in T1 (1.093), T2 (1.024), T3 (957) treatments compared with T4 (888). At week 6, body weight was lightly higher in T1 and T2 compared with T2a,T2b,T3,T3 and T4 with values of 1.874; 1.783; 1.934; 1.887; 1.881; being the lowest (P < 0.05) T3b (1.761). Feed intake was high for T2 (3.799), T1 (3.733) compared with T2a (3.590), T2b (3.610) and T3 (3.538), T3a (3552), T3b (3.520), being lowest (P < 0.05) T4 (3.376). Feed conversion was similar (P > 0.05). Water intake was lightly higher for T2 (8.488), T1 (8.442) comparing with T2a (7.696), T2b (7.948) and T3 (7.642), T3a (7.546), T3b (7.955) and the lowest (P < 0.05) T4 (6.733). Ash bone content and P were similar (P > 0.05), however this indicates a tendency to diminution of mineralization in treatments without to cover the requirement of P in both growing periods. The results indicate high potential of UP for birds.

Palabras clave : Urea phosphate; phosphorus; mineralization; chicks.