With the objective to evaluate the performance, voluntary intake and nutrient digestibilities, 24 NDB (no defined breed), non castrated male lambs with 20 ± 3.25 BW initial and 4.6 ± 0.8 months old were used. Animals were kept in feedlot and fed diets with babassu meal (0, 10, 20 and 30%) in substitution to Panicum maximum Jack hay. The diets, isoprotein and isonitrogenous, were fed in a complete mix ration. A completely blocks randomized design, with four treatments and six […]

The effect of corn grain processing (whole, treated with urea, or crushed forms) on the digestibility of diets and performance in early weaned calves kept in feedlot was evaluated. The diet was formulated with silage sorghum as forage in 40:60 forage to concentrate ratio (%DM). Digestibility of dry matter (DM), organic matter, crude protein, ether extract, neutral detergent fiber, acid detergent fiber, cellulose, gross energy and starch, fecal pH and DM intake were evaluated in an assay using six 7-mo […]

Performance and quantitative and qualitative carcass traits of lambs fed with diets containing sunflower seed were evaluated. Sixteen lambs were randomly distributed to a completely randomized design with four diets (0.00, 6.60, 13.20 or 19.80% of sunflower seed, % as fed), with 4 replications. The diets contained 2.65, 2.78, 2.89 and 2.93 Mcal / kg of metabolize energy and 18.38, 18.75, 19.98 and 21.18% crude protein, respectively, and was ad libitum fed. The lambs were weighed every 14 days and […]

The aim of this study was to evaluate the influence of environmental factors and to estimate the heritability of weaning-estrus interval in Dalland (C-40) sows in the Southeast of Brazil. Data consisting of 1,032 weaning-estrus intervals recorded in two herds were analyzed by a model that included the random effects of sire and dam and the fixed effects of year of farrowing, herd and the farrowing season, and the covariables age of sow at farrowing, litter size at birth and […]

This study aimed to estimate genetic parameters and to select genotypes of forage peanut with greater ground cover and aerial biomass production during establishment period in the environmental conditions of Acre. The experiment was planted in December/2005, in a randomized block with four repetitions. Twenty one genotypes of forage peanut were evaluated, including three cultivars: Amarillo, Alqueire 1, and Belmonte. Genotype selection was based on ground cover and dry matter production. The ground cover evaluations took place between January and […]

This study was aimed at applying Data Envelopment Analysis (DEA) models to evaluate the efficiency of introducing and adapting different technologies in beef cattle production system in the Pantanal wetlands, Brazil. The economic data used in the analysis were recorded from 1995 to 2002. Two methods were used to select the DEA variables set. The first one is based on the multicriteria approach of variables selection, which combines the conflicting objectives of better ranking of decision making unit (DMU) and […]

The objective was to evaluate the use of four levels of soybean hulls (0.0, 8.0, 16.0 and 24.0%) to replace the corn meal (0.0, 25, 50 and 75%) in the diet of sheep in feedlot. Performance, nutrient digestibilities and feeding costs were evaluated. Twenty Santa Inez breed lambs with 32.96 kg BW were distributed to a completely randomized design with four diets and five replications. The diet was composed of 50% forage (50% of corn silage and 50% of sugar […]

Aiming to assess the steer grazing behavior, an experiment was carried out with pastures composed by italian ryegrass (Lolium multiflorum Lam.) and black oat (Avena Strigosa Schreb) submitted to different sward heights (10, 20, 30, and 40 cm). The sward heights were distributed in an experimental randomized block design with three replicates. Data was recorded by visual assessment, from sunrise until sundown, in three evaluation dates, two in the vegetative stage and one in the reproductive stage. The evaluated variables […]

The effects of temperatures of extrusion process on characteristics of nitrogen and carbohydrates fractions, ether extract, in vitro protein digestibility and trypsin inhibitor factor of soybean and corn. The experiment was conducted in a completely randomized design, with three replicates in a 5 × 4 factorial arrangement, with five combinations of soybean and corn (100% soybean, 75 soybean and 25 corn, 50 soybean and 50 corn, and 25 soybean and 75 corn, 100% corn, %DM) and four temperatures of extrusion […]

The objective of this study was to determine carbohydrates and nitrogen compounds fractions of genotypes of elephant grass in a single cut at 56 days of regrowth, in the spring season. Twelve elephant grass genotypes were evaluated in a in randomized block design with three replications, in which the experimental plot consisted of four lines with 3 m length, spaced 1 m and fertilized with 100 kg of P2O5, 100 kg of N, 60 kg K2O and 25 kg of […]