Nutritional evaluation of elephant-grass silages with different levels of by-products from the cashew juice industry

Revista Brasileira de Zootecnia

Gomes, Silas Primola⁴  Pimentel, Patrícia Guimarães³  Campos, Warley Efrem¹  Ferreira, Ana Cristina Holanda⁶  Lopes, Fernando César Ferraz²  Neiva, José Neuman Miranda⁶  Rodriguez, Norberto Mario⁵ 

[1] Ministério da Agricultura, Pecuária e Abastecimento, Brasília, Brazil;Empresa Brasileira de Pesquisa Agropecuária, Juiz de Fora, Brazil;Universidade Federal do Ceará, Fortaleza, Brazil;Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Redenção, Brasil;Universidade Federal de Minas Gerais, Brazil;Universidade Federal do Tocantins, Araguaína, Brazil

关键词: agro-industrial waste;    digestibility;    intake;    in situ degradation;    nitrogen balance;   

DOI  :  10.1590/S1806-92902015001200004

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

This study was conducted to evaluate the intake, apparent digestibility (AD), and degradability in situ of elephant grass (Pennisetum purpureum Schum) silages containing 0, 35.0, 70.0, 105.0, and 140.0 g kg-1 by-product from dried cashew apple (DCBP) (as fed basis). A completely randomized design with four replicates was adopted. For the study of degradability in situ, one adult male cattle was used in a completely randomized design with split plots. Intake and AD of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose, and cellulose were evaluated, and the digestible energy (DE) and nitrogen balance (NB) of the silages were determined. The degradability in situ of DM, CP, and NDF was also determined. Addition of DCBP provided an increase in the intakes of DM, CP, NDF, and ADF. No effects of the levels of addition of DCBP were observed on the coefficients of AD of the silages. Regarding NB, positive values were only detected in the treatment with 105.0 g kg-1 DCBP. In the analysis of the degradability in situ, the incubation periods increased the rates of disappearance of DM, CP, and NDF. However, no effect of the levels of DCBP were observed on the effective degradability of DM. The by-product from dried cashew apple can be included at up to 140.0 g kg-1 in silages of elephant grass, but the high contents of acid detergent insoluble nitrogen may compromise the use and availability of nitrogen to the animals.

【 授权许可】

Unknown