Author/Authors :
C.A. Silva, M. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , M. Costa, N. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , S. Rigueira, J.P Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , S. Jesus, D.L. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , S. Silva, N.B. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , Silva Filho, W.S. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , P. Monção, F. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , D. Alves, D. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , Rocha Júnior, V.R. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , S. Araújo, J.J. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , T. Silva, J. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil , A. Chamone, J.M. Department of Animal Science - Faculty of Agricultural Science - State University of Montes Claros (Unimontes) - Avenida Reinaldo Vianna - Morada do Sol - Janaúba, Minas Gerais, Brazil
Abstract :
The objective of this study was to evaluate the effect of crude glycerin inclusion levels on BRS Capiaçu grass (Pennisetum purpureum) silage on the parameters of fermentation and chemical-bromatological composition. Experimental treatments consisted of BRS Capiaçu grass silage with five levels of inclusion of crude glycerin (0, 1, 5, 10 and 15% inclusion in the natural matter) during ensiling. In this study, a completely randomized design was used along with five treatments and six replicates. The inclusion of crude glycerin in BRS capiaçu grass silage linearly reduced pH (P<0.01) and effluent losses (P<0.01). For each percentage unit of glycerin addition, there was a reduction of 0.013 pH units and 0.0485% of the effluent losses. There was no effect of crude glycerin on the ammoniacal nitrogen content (P=0.82, an average of 6.65% of the total nitrogen). The variation in the dry matter content between the highest glycerin inclusion dose (15% of natural matter) and the control group (without glycerin) was 30.5%. The crude protein content (P=0.01), ash (P<0.01), neutral detergent fiber (NDF; P<0.01), neutral detergent fiber corrected for ash and crude protein (NDFap; P<0.01) and acid detergent fiber (ADF; P<0.01) linearly reduced with the inclusion of crude glycerin compare to the control group. In the same order, there was a reduction of 0.115%, 0.08%, 1.95%, 1.84% and 1.06%, respectively, for each percentage unit of glycerin added. The addition of crude glycerin in elephant grass silage vs. BRS Capiaçu up to 15% of the natural material had improved the fermentation profile and the chemical-bromatological composition.
Keywords :
dry matter , effluent loss , glycerol , Pennisetum purpureum , total digestible nu-trients
