The energy value of biodiesel glycerine products fed to broilers at different ages

Journal of Animal Physiology and Animal Nutrition - Tập 97 Số 5 - Trang 896-903 - 2013
Eduardo Lima1, Paulo Borges Rodrigues1, Renata Ribeiro Alvarenga1, Verônica Maria Pereira Bernardino1, L. Makiyama1, Renato Ribeiro de Lima2, V.S. Cantarelli1, Márcio Gilberto Zangerônimo3
1Department of Animal Science, Federal University of Lavras, Lavras, Minas Gerais, Brazil
2Department of Exact Science, Federal University of Lavras, Lavras, Minas Gerais, Brazil
3Department of Veterinary Science, Federal University of Lavras, Lavras, Minas Gerais, Brazil

Tóm tắt

SummaryThe objective of this study was to determine the apparent metabolisable energy corrected for nitrogen balance (AMEn) of some products containing glycerine from soybean oil (GOIL), a mixture of frying oil and lard (GMIX) and a semi‐purified process (GSP) in broilers of different ages (10, 20, 30 and 40 days post‐hatching), using two methodologies. In trial 1, the basal diets were replaced with 100 g/kg of each studied glycerine product and the diets were supplied ad libitum. Three hundred broilers were used in five replicates, with five, four, three and three animals per cage in each age group, respectively. The AMEn was calculated for each experimental unit. In trial 2, dietary treatments included the addition of glycerine at 0, 40, 80 or 120 g/kg for each crude glycerine product, with 900 broilers in six replicates, using the same number of animals per cage as described in trial 1. Depending on the experimental unit, the feeding was restricted in 88%, 92%, 96% and 100% of estimated intake according to the Cobb guide. The AMEn was determined using linear regression between the feed intake and the AMEn of each diet. In both trials, the total excreta collection method was used. Because of the chemical composition, GMIX was not considered crude glycerine. The mean AMEn values of the products were 20.55 MJ/kg, 15.80 MJ/kg and 15.05 MJ/kg for GMIX, GSP and GOIL, respectively. There was a linear decrease (p < 0.01) in the AMEn values with the increasing age of the broilers. Numerically, it was observed that the AMEn values decreased until 28–30 day post‐hatching and then remained constant until the finishing phase. It is concluded that products containing glycerine can be used as an energy source for broilers, but that AMEn values can vary according to age. Younger broilers have a higher capacity of energy utilisation from these feedstuffs.

Từ khóa


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Thông tin xuất bản

Journal of Animal Physiology and Animal Nutrition

Tập 97 Số 5

896-903

Thông tin tác giả