The objective of this work was to determine the in vitro effect of the propolis on the specific activity of ammonia production (SAAP) or activity deamination of amino acids and on ruminal fermentation in bovine. The SAAP was determined using ruminal fluid and McDougall buffer (1:4) with different levels of propolis extract and excess of hydrolyzed casein. In the study of the in vitro effect of the propolis on the ruminal fermentation and SAAP, four Holstein steers were used, in […]

Three assays were carried out to determine the threonine requirement and the digestible threonine:lysine ratio of broiler males, Avian Farm, from 1 to 20, 24 to 38 and 44 to 56 days of age. A completely randomized design with five levels of threonine, six replicates and 20 birds per pen from 1 to 20 and 24 to 38, and 16 birds per pens from 44 to 56 were used in each experiment. The concentrations of digestible threonine were 0.684 to […]

The experiment was carried out to study the effects of fiber levels (38.7 and 57.2% NDF), composed of elephantgrass silage and chopped sugarcane and two protein sources, a high (soybean meal) and low (blood meal and corn glúten meal) ruminal degradable protein, on the ammonia nitrogen concentration (N-NH3) and on the ruminal pH of steers. Four rumen fistulated Brow-Swiss steers, with 316 kg of average initial weight, were randomly allotted to a 4 x 4 Latin square design. The steers […]

A trial involving nineteen zebu steers with initial live weight of 270 kg was conducted with the objective of determining their protein requirements. Four steers were slaughtered at the beginning of the trial, compounding the reference group, three were fed at maintenance level and the remaining were uniformly allotted to a complete randomized design, of three treatments, with different levels of concentrate in the diets (5, 35, 65 %, in the total dry matter basis). As roughage was used Brachiaria […]

A digestibility trial was carried out to determine the dry matter (MS), gross energy (EB) and crude protein (PB) apparent digestibility coefficients (CD) for fish meal (FP), poultry by-products meal (FV), gluten meal (GM) and alchool spray dried yeast (LV) for Thai Nile tilapia fingerlings. A hundred sexually reverted fishes (average weight 37.6 ± 5.0 g) were assigned to two 500-L feeding tanks and two 150-L cylindrical tanks with conical bottom, to feces collection . CD analysis was performed by […]

This work had the objective to evaluate the forage potential of Paspalum dilatatum Poir. biotype Virasoro and Festuca arundinacea Schreb., an exotic species in the southern regions of Brazil. The individual plant shoots were harvested for twelve months, cultivated in the field, and evaluated as for the dry matter availability (DMA), crude protein (CP) and neutral and acid detergent fiber (NDF and ADF). The virasoro showed seasonal cicle, with the maximum DMA in the spring/summer period (98 g DM/plant), while […]

It was carried out an experiment with goats Saanen, on the first lactation, with 50 kg of body weight, housed in individual stalls of 3 m², to evaluate the effect of substitution of soybean meal (SM) protein by the protein from the corn gluten flour (CGF), in the milk production, milk composition, voluntary intake and plasmatic urea. The experimental design was the triple Latin square 4×4, with four periods of 21 days, being 14 days of adaptation to the diet […]

The work was carried out to evaluate the partial replacement of soybean meal by urea and forage cactus on the performance of lactating dairy Holstein. Eight cows with 90 days in milk and 600 kg of initial average LW, were assigned in a two 4 X4 latin square design. The urea represented 0.0, 0.8, 1.54 and 2.40% of dry matter (DM) of the diets, correspondent to 2.32, 4.65, 6.66 and 8.02% of crude protein (CP) levels in the form of […]

The objective of this work was to determine the chemical composition of irrigated Tanzaniagrass (Panicum maximum Jacq.). and to validate the Cornell system. Simulated-grazed samples were collected on three periods of the year (spring, summer and fall, totaling 10 grazing cycles) on irrigated paddocks, rotationally grazed to three post grazed stubbles (low, medium and high). Although there were no statistical differences imposed by the treatments during the year, the neutral detergent fiber (NDF) and acid detergent fiber (ADF) showed higher […]

An experiment in the biotherium of Nutrition Department/UFV aiming to evaluate the effects of rotten corn and the quality of your protein for growing rats. Thirty Wistar female rats early weaned, with 22 days of age and average initial weight of 53.9 ± 3.2 g were assigned to a randomized design. With five treatments and six repetitions with one animal by experiment unity. The treatments consisted in a basal ration (positive control), like a casein standard, four rations with corn […]