Chemical composition of sugarcane silages with crambe bran

• Published in: Ciência e agrotecnologia 2020-01, Vol.44
• Main Authors: Bonfá, Caroline Salezzi, Guimarães, Cíntia Gonçalves, Evangelista, Antônio Ricardo, Santos, Alexandre Soares dos, Guimarães, Amanda Gonçalves, Gandini, Elizzandra Marta Martins
• Format: Article
• Language: English
• Subjects: AGRICULTURE, MULTIDISCIPLINARY; Biodiesel; co-product; response surface; sustainability
• ISSN: 1413-7054; 1981-1829; 1981-1829
• DOI: 10.1590/1413-7054202044016920

ABSTRACT We evaluated the contents of dry matter (DM), crude protein (CP), mineral matter (MM), soluble carbohydrates (CHOS), ammonia nitrogen (N-NH3), neutral detergent fiber (NDF), and acid detergent fiber (ADF) in sugarcane silages to which different levels of inclusion (LI) of crambe bran (CB) were added in proportions of 0, 3, 10, 17 and 20% at different storage times (ST). Laboratory silos were used, predetermined ST being 0, 3, 7, 12, 24, 36, 41, and 60 days after silage. For statistical analysis, the response surface methodology was used, in which LI and ST served as independent factors and response variables as dependent factors. The levels of DM and CP increased linearly with NI; however, it did not show any significant response regarding ST. The CHOS contents were reduced linearly with NI and displayed a quadratic response with ST. The interaction between NI and ST for the levels of N-NH3 was significant, as the levels reduced with the NI and ST. The levels of NDF and ADF reduced linearly with NI and displayed a quadratic response with ST. The CB showed high efficacy to improve fermentation of ensiled cane, with the addition and conservation of nutrients in all NI evaluated and over the storage time. In addition to the residues generated with the production of biodiesel in a sustainable way, CB is a viable alternative to the sugarcane silage. RESUMO Avaliou-se os teores de matéria seca (MS), proteína bruta (PB), matéria mineral (MM), carboidratos solúveis (CHOS), nitrogênio amoniacal (N-NH3), fibra em detergente neutro (FDN) e fibra em detergente ácido (FDA), de silagens de cana-de-açúcar adicionadas de diferentes níveis de inclusão (NI) de farelo de crambe (FC), nas proporções de 0; 3; 10; 17 e 20%, e avaliados em diferentes tempos de armazenamento (TA), em dias. Utilizou-se silos laboratoriais, abertos nos tempos 0; 3; 7; 12; 24; 36; 41 e 60 dias após a ensilagem. Para a análise estatística utilizou-se a metodologia de superfície de resposta, em que os fatores independentes foram os NI e os TA, e os fatores dependentes foram as variáveis respostas. Os teores de MS e de PB aumentaram linearmente com os NI, mas não apresentaram respostas significativas quanto aos TA. Os teores de CHOS reduziram linearmente com os NI e apresentaram resposta quadrática com os TA. Houve efeito significativo da interação entre NI e TA para os teores de N-NH3, pois os teores reduziram com os NI e TA, de forma conjunta. Os teores de FDN e FDA reduziram linearmente com