Determinação dos valores energéticos de farinhas de carne e ossos para suínos, ajuste e avaliação de modelos de predição da energia metabolizável

Abstract

The aim of this study was to determine the chemical and energetic composition of seven different meat and bone meals (MBM) for swine, adjustment and evaluation of the models to predict of metabolizable energy values (ME). 32 crossbreed swine were used in order to determine the ME castrated males, averaging 26.75 ± 1.45 kg initial weight, allotted in a randomized block design with eight treatments, four replicas and one animal per experimental unit. The treatments consisted of a basal diet and seven meat and bone meals, which replaced 20% of basal diet. The experimental period was done in 12 days, seven days for the animals to adapt to metabolic cages and the diets, and five days period of total, but separated collection of feces and urine, using the ferric oxide (Fe2O3) as fecal marker to define the beginning and end of the collection period. The chemical composition of the different MBM was determined. The dry matter, crude protein, ether extract, crude fiber, ash, calcium and phosphorus ranged from 92.09 to 97.25, 40.73 to 50.28, 8.68 to 12.07, 1.82 to 3.22, 31.90 to 44.66, 10.41 to 15.84 and 5.17 to 7.62%, respectively. The values of the pepsin digestibility of crude protein, NaOH 0.1 N 100 g-1 acidity and average geometric diameter ranged from 48.12 to 80.78%, 0.16 to 2.05 meq 100 g-1 and 809.00 to 1262.00 μm, respectively. The ME values of MBM ranged from 1645 to 2645 kcal kg-1. The prediction equations EM1 = -4233.58 + 0.4134EB +72P +89.62MM -159.06Ca; EM2 = 2087.49 +0.3446EB +31.82MM -189.18Ca; EM3 = 2140.13 + 0.3845EB -112.33Ca; EM4 = -346.58 +0.656EB; EM5 = 3221.27 +178.96EE -76.55MM and EM6 = 5356.45 -84.75MM, generated in this study were effective in predicting the ME from typical Brazilian MBM, calculated from their chemical composition. However, there was no validation of predict models to the values of ME from international researches of MBM