ABSTRACT The present study presents a comparative evaluation of the transit kinetics of straw briquette in response to the dietary addition of non-protein nitrogen sources in the form of a mineral supplement. Four rumen-cannulated, castrated Holstein-Gir crossbred cattle, weighing an average of 380±22.64 kg, were distributed into a 4 × 4 Latin square design (four supplements with non-protein nitrogen sources × four experimental periods). The following non-protein nitrogen sources were studied: conventional urea, slow-release urea, extruded urea, and monoammonium phosphate. […]

The experiment was carried out to evaluate the intake, apparent digestibility and the milk yield of goats fed elephant grass silages containing industrial by-products. Eight Saanen breed goats were used, distributed in two 4 × 4 Latin squares, with four 14-day periods (ten days of adaptation and four days for data collection). The treatments were: elephant grass silage + concentrate; elephant grass silage containing 15% cassava meal + concentrate; elephant grass silage containing 15% coffee hulls + concentrate; elephant grass […]

This experiment was carried out to evaluate the fractions that compose carbohydrates and protein from elephant grass silage with 15% of coffee hulls, cocoa meal or cassava meal. The addition of residues at the ensilage moment was performed in natural matter basis (weight/weight), with ten replicates per treatment. The addition of residues at the ensilage moment was performed in natural matter basis (weight/weight), with ten repetitions per treatment. The total carbohydrates level of the silage with cassava meal was greater […]

The experiment was conducted with the objective of evaluating chemical composition and in vitro dry matter digestibility of sugar-cane bagasse containing 60% dry matter submited to increasing sodium hydroxide concentrations (0, 2.5, 5, and 7.5% NaOH on a dry matter basis). NaOH was applied as a 2:1 water:NaOH solution, over different treatment times (1, 3, 5, and 7 days). Plastic pails with 10 L capacity were utilized and stocked in climatic chamber at 25ºC constant temperature. The experimental treatments had […]

The objective of this trial was to characterize the byproduct of lysine production (BLP) and to evaluate performance and carcass traits of confined Santa Gertrudis young bulls receiving increasing dietary levels of BLP. The chemical composition of BLP was the following (dry matter basis): 38% dry matter and 85% crude protein with 79% of this total coming from nonprotein nitrogen; no toxic levels of heavy metals were detected. Twenty-seven young bulls averaging ten months of age and initial body weight […]

Three Holstein steers, canulated in the rumen, where were incubated nylon bags with sugarcane bagasse, were maintained in feedlot, in individual boxes, according to the following treatments: T1 – bagasse without treatment (control); T2 – bagasse treated with 2.5% Na2S; T3 – bagasse treated with 4% NH3 and T4 – bagasse treated with 2.5% Na2S + 4% NH3. Higher potential degradability was observed for the treatment with bagasse treated with NH3 and NH3 plus Na2S. Dry matter degradability ranged from […]

Sixteen ½ Holstein/Indubrasil heifers, averaging 230 kg of live weight, housed in individual boxes, were allotted to a completely randomized design, with four treatments and four replicates, according to the following treatments: T1 – bagasse without treatment (control); T2 – bagasse treated with 2.5% Na2S; T3 – bagasse treated with 4% NH3 and T4 – bagasse treated with 2.5% Na2S + 4% NH3. All treatments were based on bagasse dry matter. Sugarcane bagasse was stored for 10 months e, after […]

The decomposition dynamics and mineralization of nitrogen of fourteen residues of grasses and legumes forages varying in origin and collecting places were evaluated. Seven species were selected (B. humidicola, B. brizantha, A.pintoi, D.ovalifolium, L.leucocephala, S. guianensis and C. pubescens), based on qualitative characteristics and using the distance medium Euclidian as dissimilarities measure and then placed in erlenmeyers vases in the laboratory in an entirely randomized fashion. Decomposition data were analyzed using a split-splot design with residues in the main plot […]