Energy values of crude glycerin for broilers

C De Souza,C Eyng,T.L Kohler,L Wachholz,C Souza,J Broch,R.V Nunes

doi:10.1590/1678-4162-11751

Abstract

ABSTRACT The energetic values of crude glycerin (CG) were determined for broilers at different ages using the method proposed by Matterson and by polynomial regressions. Two trials were performed with broilers from 11 to 21 and from 31 to 41 days of age. The birds were distributed in a completely randomized experimental design with a reference ration (RR), without CG, and three ration tests with replacement of 5%, 10%, and 15% of RR by CG. The metabolizable energy values were calculated by the Matterson method, and the apparent metabolizable energy (AME) values were used in polynomial regression analysis. The mean values of AME, apparent corrected for nitrogen balance (AMEn), metabolizable coefficient of gross energy (CAMEB), and corrected for nitrogen balance (CAMEBn) of CG, for the phase from 11 to 21 days by the Matterson method were 10.08 MJ kg-1, 10.04 MJ kg-1, 67.06%, and 66.74%, respectively. The inclusion of CG presented an increasing linear effect for CAMEB and CAMEBn in this period. From 31 to 41 days, these values were 10.38 MJ kg-1, 10.27 MJ kg-1, 69.02%, and 62.24%, respectively. The predicted AMEn value through the polynomial regression equations was 10.49 MJ kg-1 and 10.18 MJ kg-1, respectively. According to the equations proposed by Matterson, the crude glycerin EMAn values for broilers from 11 to 21 and 31 to 41 days of age were 10.04 MJ kg-1 and 10.26 MJ kg-1, respectively. According to Adeola's method the AMEn values were 10.49 and 10.20 MJ kg-1 for each phase.

Highlights

Corn is the main energetic ingredient in the diet of non-ruminants, comprising 60% to 70% of the diet
The metabolizable energy values were calculated by the Matterson method, and the apparent metabolizable energy (AME) values were used in polynomial regression analysis
The mean values of AME, apparent corrected for nitrogen balance (AMEn), metabolizable coefficient of gross energy (CAMEB), and corrected for nitrogen balance (CAMEBn) of Crude glycerin (CG), for the phase from 11 to 21 days by the Matterson method were 10.08 MJ kg-1, 10.04 MJ kg-1, 67.06%, and 66.74%, respectively

Summary

Introduction

Corn is the main energetic ingredient in the diet of non-ruminants, comprising 60% to 70% of the diet. Crude glycerin (CG), a byproduct of biodiesel production, it is one of these possible substitutes. After going through the refinement process, it can be employed in the pharmaceutical industry, the production of cosmetics, the military, and the food industry (Sehu et al, 2012). In this sense, research has been developed with the purpose of analyzing the use of glycerin in its crude form as an alternative to energetic foods in the diet of nonruminant animals, avoiding the refinement process (Silva et al, 2012; Henz et al, 2014)

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