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

Filipe Ton Fialho,Severino Delmar Junqueira Villela,Fernando De Paula Leonel,Raphael Pavesi Araujo,Henrique Valentim Nunes Machado,Wagner Pessanha Tamy

doi:10.1590/s1806-92902015000600001

Abstract

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.

Highlights

The 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
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)
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

Summary

Introduction

The 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. Methods have been sought for the proper use of agroindustrial waste or by-products in animal feeding. The knowledge of the right use of these residues can certainly contribute to reducing the costs with animal feeding and the environmental impact (Carvalho Junior et al, 2010). Several products originated from the industrialization or harvest, such as peelings and bagasse, have been produced on a large scale in Brazil. The largest part of this material has been underused in animal feeding due to its low nutrient concentration. Research investigating the possibility of using these products, especially regarding their nutritional quality, has shown to be increasingly promising

Methods

Results

Conclusion