Evaluation of elephant grass silage with the addition of cassava scrapings

Revista Brasileira de Zootecnia

Anderson De Moura Zanine²  Edson Mauro Santos¹  João Ricardo Rebouças Dórea¹  Paulo Alfredo De Santana Dantas¹  Thiago Carvalho Da Silva¹  Odilon Gomes Pereira¹ 

[1] ,Universidade Federal de Mato Grosso

关键词: crude protein;    dry matter;    effluent;    fermentation;    gas;    efluente;    fermentação;    gases;    matéria seca;    proteína bruta;   

DOI  :  10.1590/S1516-35982010001200008

来源: SciELO

【 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】

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