Mixed sugarcane and elephant grass silages with or without bacterial inoculant

Revista Brasileira de Zootecnia

Valadares Filho, Sebastião de Campos¹  Garcia, Rasmo¹  Fernandes, Francisco Eden Paiva¹  Pereira, Odilon Gomes¹  Porto, Marlos Oliveira¹  Cavali, Jucilene¹ 

[1] Universidade Federal de Viçosa

关键词: effluent;    ethanol;    nutritional value;    organic acids;    soluble sugarsRESUMO Avaliou-se o efeito de diferentes relações de cana-de-açúcar e capim-elefante (0:100;    25:75;    50:50;    75:25 e 100:0% na matéria natural) sobre a composição química e as perdas em silagens tratadas com inoculante bacteriano utilizando-se silos laboratoriais;   

DOI  :  10.1590/S1516-35982010000300003

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The effects of different ratios of sugarcane and elephant grass (0:100, 25:75, 50:50, 75:25 and 100:0% of the natural basis) were assessed on the chemical composition and losses in silages treated with a bacterial inoculant, using laboratory silos. A 2 × 5 factorial arrangement (with and without inoculant and five elephant grass ratios) in a randomized blocks design with three replications was used. Interaction was observed in the sugarcane and elephant grass ratio × bacterial inoculant for crude protein (CP) and pH. The other variables were influenced only by the increasing proportions of elephant grass. The contents of dry matter, neutral detergent fiber corrected for ashes and protein, acid detergent fiber, insoluble protein in acid detergent fiber, hemicellulose and lignin in the silages increased linearly with the proportions of elephant grass. The water soluble carbohydrate contents and dry matter in vitro digestibility of the silages decreased linearly with the increase in the proportion of elephant grass. The mean value of ammonia nitrogen in relation to total N was 7.0% (% of DM). The CP values of the inoculated and non-inoculated silage fitted linear models. The highest CP content was observed in the silage treated with inoculant. The pH values of the silages, with and without inoculant, fitted quadratic and linear models, respectively. The lactic acid, propionic acid and butyric acid contents were not influenced by the elephant grass ratios, while the acetic acid content, for the non-inoculated silages, and ethanol decreased linearly with the increase in elephant grass. The ratio of 25% sugarcane and 75% elephant grass improves the nutritional value and increases the silage DM recovery, because of the lower effluent and gas productions. The homofermentative bacterial inoculant does not affect the sugarcane silage.

【 授权许可】

CC BY-NC