Avaliação nutricional de farinhas de vísceras de aves e a utilização em rações de frangos de corte

Abstract

The experiments were conducted with the purpose of determining the values of energy and nutritional of poultry offal meal (POM) for broiler chickens. Initially was analyzed the composition of three POM and two trials were conducted, one for determining the rate of passage and another to determine the apparent and true metabolizable energy corrected (AMEn and TMEn). The POMs had an average of: 93.34% dry matter, 62.73% for crude protein (CP), 15.42% ether extract (EE), 5200 kcal / kg gross energy (GE) and 10 , 18, 2.61, 1.37, 0.47, 0.59 and 0.78% for mineral matter (MM), calcium (Ca), phosphorus (P), sodium (Na), chlorine (Cl) and potassium (K), respectively. The density was about 457.64 g/L and geometric mean diameter of 639.09 μm. The rate of passage of FVA is correlated (r = -99.86%) with the level of EE. Flour showed values of: 3996, 3770 and 4167 kcal / kg for AMEn and 4016, 3794 and 4187 kcal/kg for TMEn for the POM A, B and C, respectively. Another search was conducted and consisted of a bibliography revision, considering only the works published on FVA developed in Brazil, to generate models to predict the values of AMEn and TMEn. Equations were developed for POMs with medium EE content (AMEn = -2315.69 +31.4439(PB)+29.7697(MM)+0.7689(EB)-49.3611(Ca), R ² = 0,72), with high levels of EE (AMEn = +3245.07+46.8428(EE), R² = 0.76) and high levels of MM (AMEn = 4059,15-440397(P), R² = 0,82). To estimate the values TMEn, two equations were obtained: one for high levels of MM (TMEn = 5092,57-115647 (MM), R ² = 0.78) and another for low (TMEn = 3617,83-15,7988(PB)-18.2323(EE)-96.3884(MM) +0.4874 (EB), R² = 0.76). A final experiment was conducted to determine the effects of inclusion of FVA in the diets of broiler chickens on performance and carcass characteristics. Weight gain, feed conversion, carcass yield and weights showed quadratic response. The abdominal fat increased linearly. The performance of livestock and poultry carcass yield and weights were maximized with the inclusion of 5.3% and 6.5% of poultry offal meal in the diet, respectively.