Evaluation of elephant grass silage with the addition of cassava scrapings

Revista Brasileira de Zootecnia

Dantas, Paulo Alfredo de Santana¹  Zanine, Anderson de Moura²  Santos, Edson Mauro³  Pereira, Odilon Gomes⁴  Silva, Thiago Carvalho da³  Dórea, João Ricardo Rebouças⁵ 

[1] Universidade Estadual Santa Cruz;Universidade Federal de Mato Grosso;Universidade Federal da Paraíba;Universidade Federal de Viçosa;Universidade de São Paulo

关键词: crude protein;    dry matter;    effluent;    fermentation;    gas RESUMOObjetivou-se com este experimento avaliar os efeitos da adição de raspa de mandioca na ensilagem sobre as perdas por gases e efluentes;    a recuperação da matéria seca;    o pH;    os teores de N-NH3;    ácidos orgânicos e ácidos graxos voláteis e a composição bromatológica de silagens de capim-elefante;   

DOI  :  10.1590/S1516-35982010001200008

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this experiment was to evaluate the effects of adding cassava scrapings on gas and effluent losses, dry matter recovery, pH, contents of N-NH3, organic acids and volatile fatty acids and the bromatological composition of elephant grass silages. It was used a randomized complete design, with four levels of cassava scrapings (0, 7, 15 or 30% natural matter) each one with four replications per level. The grass was cut at 50 days of regrowth and ensiled in 15-L silos, equipped with a Bunsen valve to allow gas outflow. The gas losses decreased quadratically with the addition of cassava scrapings, whereas effluent losses decreased linearly. Dry matter recovery increased quadratically with the addition of cassava scrapings. Dry matter (DM) concentration increased but crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and hemicellulose (HEM) decreased linearly with the addition of cassava scrapings. The pH value and lactic acid concentration increased quadratically with the addition of cassava scrapings. Contents of N-NH3 and butyric acid decreased quadratically with the addition of cassava scrapings, whereas acetic acid content decreased linearly. Addition of cassava scrapings reduced gas and effluent losses and improved the fermentation profile of elephant grass silages and the level of 7% already ensures this improvement.

【 授权许可】

CC BY-NC