Ferreira Daniele J, Zanine Anderson M, Lana Rogério P, Ribeiro Marinaldo D, Alves Guilherme R, Mantovani Hilário C
Departamento de Zootecnia, Universidade Federal de Mato Grosso, Rondonopolis, MT, Brasil.
Departamento de Zootecnia, Universidade Federal de Vicosa, Vicosa, MG, Brasil.
An Acad Bras Cienc. 2014 Mar;86(1):465-73. doi: 10.1590/0001-37652014112312. Epub 2013 Dec 1.
The objective of the present study was to assess the chemical and bromatological composition and in situ degradability of elephant grass silages inoculated with Streptococcus bovis isolated from cattle rumen. A complete randomized design was used with four treatments and six replications: elephant grass silage, elephant grass silage inoculated with 10(6) CFU/g Streptococcus bovis JB1 strains; elephant grass silage inoculated with 106 CFU/g Streptococcus bovis HC5 strains; elephant grass silage inoculated with 106 CFU/g Enterococcus faecium with six replications each. The pH and ammoniacal nitrogen values were lower (P<0.05) for the silages inoculated with Streptococcus bovis JB1 and HC5, respectively. The silage inoculated with Streptococcus bovis had a higher crude protein content (P<0.05) and there were no differences for the fiber contents in the silage. The (a)soluble fraction degradability, especially in the silages inoculated with Streptococcus bovis JB1 and HC5, had higher values, 30.77 and 29.97%, for dry matter and 31.01 and 36.66% for crude protein, respectively. Inoculation with Streptococcus bovis improved the fermentation profile, protein value and rumen degradability of the nutrients.
本研究的目的是评估接种从牛瘤胃分离出的牛链球菌的象草青贮饲料的化学和营养成分以及原位降解率。采用完全随机设计，有四种处理，每种处理六个重复：象草青贮饲料、接种10(6) CFU/g牛链球菌JB1菌株的象草青贮饲料；接种106 CFU/g牛链球菌HC5菌株的象草青贮饲料；接种106 CFU/g粪肠球菌的象草青贮饲料，每种处理各六个重复。接种牛链球菌JB1和HC5的青贮饲料的pH值和氨态氮值分别较低（P<0.05）。接种牛链球菌的青贮饲料粗蛋白含量较高（P<0.05），青贮饲料中的纤维含量没有差异。（a）可溶性部分的降解率，特别是接种牛链球菌JB1和HC5的青贮饲料，干物质降解率较高，分别为30.77%和29.97%，粗蛋白降解率分别为31.01%和36.66%。接种牛链球菌可改善青贮饲料的发酵特性、蛋白质价值和营养物质的瘤胃降解率。
