Abstract
The objectives of this study were to evaluate the fermentative and bromatological characteristics of Piata palisadegrass that was ensiled with energetic brans and to assess the costs of different additive levels. This experiment was conducted at the Goiano Federal Institute on the Rio Verde campus in Goias State, Brazil. The experimental design was entirely random with four replications in a 4 × 5 factorial scheme that included four energetic brans (millet, maize, sorghum and wheat) and five levels (0%, 8%, 16%, 24% and 32%). The energetic brans can be considered as a good source of additives for Piata palisadegrass ensiling, which improves the qualitative and nutritional fermentative characteristics of the silage. The maize and wheat brans were the most efficient for improving the fermentative characteristics of the silage. However, millet bran was the most efficient for improving the bromatological characteristics. In addition, the wheat bran had the greatest influence on the final production cost and the sorghum and millet brans were the most economically feasible. Overall, the addition of 24% bran is recommended due to its beneficial impact on silage quality and the average final production cost of the silage.
Highlights
The midwestern region of Brazil is characterized by two defined seasons each year: a rainy period and a dry period
The bromatological composition of the silage was determined by measuring the dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin, cellulose, hemicellulose, ether extract (EE) and mineral material (MM) concentrations based on the methods of [4]
These results demonstrate the efficacy of the energetic brans for decreasing the silage pH because they contain high dry mass (DM) and soluble carbohydrate concentrations relative to the Piata palisadegrass (19.2%)
Summary
The midwestern region of Brazil is characterized by two defined seasons each year: a rainy period and a dry period. To obtain silage with good nutritional value from tropical grasses, the grasses must be collected at young ages based on their growth cycle During this stage of development, the forage generally has a low dry mass (DM) concentration, which is associated with the low soluble carbohydrate concentrations in tropical grasses. These brans serve as a source of energy, protein and soluble carbohydrates, prevent secondary fermentation, and increase the nutritional value of the silage These brans provide an alternative for improving silage quality by compensating for the low DM concentrations and by contributing to silage fermentation [3]. The use of these brans in Piata palisadegrass silage is feasible because the Midwestern region of Brazil is one of the largest producers of these grains. The objectives of this study were to evaluate the fermentative and bromatological characteristics of Piata palisadegrass ensiled with energetic brans and to determine the costs of the different additive levels
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