Kinetics of transit and degradation of the fiber from guinea grass silages enriched with waste from soybean pre-cleaning

Revista Brasileira de Zootecnia

Machado, Henrique Valentim Nunes⁴  Leonel, Fernando de Paula⁴  Tamy, Wagner Pessanha²  Villela, Severino Delmar Junqueira¹  Araujo, Raphael Pavesi³  Fialho, Filipe Ton¹ 

[1] Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brasil;Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, Brasil;Instituto Federal do Tocantins, Colinas do Tocantins, Brasil;Universidade Federal de São João del Rei, São João del Rei, Brasil

关键词: by-product;    mathematical models;    mean retention time;    true digestibilityIntroductionThe need to reduce costs and the impact on the production of animal-derived products leads to a greater focus on the rational use of all feed resources available;   

DOI  :  10.1590/S1806-92902015000600001

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective was to study the kinetics of transit and degradation of the fiber from guinea grass and the waste from soybean pre-cleaning (WSPC), ensiled with different proportions of mass (0, 100, 150, and 200 g WSPC/kg total mass). Four crossbred (Gyr × Holstein), fistulated cattle with an average body mass of 400±50 kg were organized in a 4 × 4 Latin square experimental design. The fiber utilized in the study of the transit kinetics was stained with chromium mordant, whereas the in situ technique was adopted for the degradation kinetics. The level of inclusion of WSPC only affected the true digestibility and the mean retention time. The addition of waste from soybean pre-cleaning to the silage of guinea grass is beneficial, in terms of kinetics of digestion and passage, at up to levels close to 100 g/kg, because after this quantity the fiber digestion and passage in and through the reticulo-rumen are impaired and there may be alterations in the ruminal environment that will affect the use of silage by animals.

【 授权许可】

Unknown