Chemical and bromatological characteristics of elephant grass silages containing a mango by-product

• Published in: Revista brasileira de zootecnia 2010, Vol.39 (1), p.81-87
• Main Authors: Rêgo, Margareth Maria Teles, Neiva, José Neuman Miranda, Rêgo, Aníbal Coutinho do, Cândido, Magno José Duarte, Carneiro, Maria Socorro de Sousa, Lôbo, Raimundo Nonato Braga
• Format: Article
• Language: English
• Subjects: AGRICULTURE, DAIRY & ANIMAL SCIENCE; fermentation; fermentação; Mangifera indica; nutritive value; Pennisetum purpureum; valor nutritivo; VETERINARY SCIENCES
• ISSN: 1516-3598; 1806-9290; 1806-9290; 1516-3598
• DOI: 10.1590/S1516-35982010000100011

This study was carried out to evaluate the nutritive value of elephant grass (Pennisetum purpureum, Schum.) silages with the addition of 0, 4, 8, 12 and 16% dehydrated mango (Mangifera indica, L.) by-product (DMB), on the fresh matter basis. A randomized complete design with four replications was used. As experimental silos, 210L plastic drums were used. Dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose (HCEL), ether extract (EE), total carbohydrates (TC), non-fibrous carbohydrates (NFC), neutral detergent insoluble nitrogen (NDIN, % total N), acid detergent insoluble nitrogen (ADIN, % total N), pH values, ammoniacal nitrogen (% total N), lactic acid, acetic acid, butyric acid and propionic acid levels were determined. The DM, OM, CP, EE, NFC, NDIN, lactic acid and propionic acid levels increased with the DMB addition while the NDF, ADF, hemicellulose, N-NH3/ammoniacal nitrogen levels and the pH values decreased with the DMB addition. The addition of DMB had a quadratic effect on the acetic and butyric acid levels but there was no effect with the addition of DMB on TC and ADIN. The DMB can be used at the ensiling of the elephant grass, because the addition of 8.6% improves the silages fermentative process. However, these silages have low crude protein levels and high contents of ether extract and nitrogen compounds mixed with the fiber (NDIN and ADIN) in the silages, that may damage their use by animals. Este trabalho foi conduzido com o objetivo de avaliar o valor nutritivo de silagens de capim-elefante (Pennisetum purpureum, Schum.) com 0; 4; 8; 12 e 16% de subproduto do processamento de manga (Mangifera indica L.) desidratado, com base na matéria natural. Utilizou-se o delineamento inteiramente casualizado com quatro repetições. Como silos experimentais, foram utilizados tambores plásticos de 210 L. Determinaram-se os teores de nutrientes, os valores de pH e os teores de nitrogênio amoniacal (N-NH3, % do N total), ácido lático, acético, propiônico e butírico. Os teores de matéria seca (MS), matéria orgânica (MO), proteína bruta (PB), extrato etéreo (EE), carboidratos não-fibrosos (CNF), nitrogênio insolúvel em detergente neutro (NIDN), ácido lático e ácido propiônico aumentaram com a adição do subproduto de manga. Os teores de FDN, FDA e hemicelulose, o pH e o N-NH3 (% do N total), no entanto, diminuíram com a adição do subproduto de manga. A adição do subproduto de manga t