Abstract

SANTOS, Ricardo dos et al. Decrease of the levels of calcium and phosphorus in diets with whole rice meal and enzymes on the performance of broilers. Cienc. Rural [online]. 2004, vol.34, n.2, pp. 517-521. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782004000200028.

The objective of this work was to study the effect of the growing levels of whole rice meal (WRM) on the performance of broilers chickens and to evaluate the reduction of the calcium (Ca) and phosphorus (P), when the diets were supplemented with enzymes exogenous. A total of 480 chicks (females) Cobb 12 days old were used, distributed in 8 treatments evaluating 4 levels of WRM (0%, 10%, 20% and 30%), with and without supplementation of a multienzyme complex, with 3 repetitions of 20 poultries for treatment. In the diets that contained enzymes, the levels of Ca and P were decreased in 0,1%, in all the development phases. With the addition of growing levels of Whole rice meal in the diets, there was a significant lineal regression (P<0.05) with redution of the body weight, feed intake and of the weight gain of the broilers. The feed conversion increased lineally as they increased the levels of WRM, but there was no significant effect (P>0.05). The enzymatic supplementation in the different levels of WRM didn’t present significant statistical difference. The use of low levels of Ca and P didn’t harm the acting of the birds.

Keywords : enzymes; integral rice bran; performance; calcium and phosphorus.