The experiment was conducted at the FCAV-Unesp, Jaboticabal-SP, to evaluate the effects of the fertilization with four doses of NPK on the components of dry matter (DM) and losses by trampling of two cultivars of Panicum maximum Jacq. (Tanzania and Mombaça) under grazing, having a rest period of 28 days and an average height of residue of 30 cm. A complete randomized block design was used with treatments arranged in a 2 x 4 factorial with three field replications. The […]

Carcass physical composition and meat qualitative characteristics of cull cows from two breeding systems, straightbreds (Charolais and Nellore) and crossbreds F1 1/2 Charolais-Nellore and 1/2 Nellore-Charolais, were evaluated. The cows were feedlot finished during 80 days and fed with 65% roughage (sorghum silage) and 35% concentrate, in dry matter basis. Charolais cows showed carcass with higher muscle (65.2 vs 58.8%) and bone (15.36 vs 13.7%) percentages, higher muscle (166.5 vs 139.61 kg) and bone (38.84 vs 32.34 kg) production than […]

Three blood constituents in eight crossbred Saanen goats bred in two systems ¾ pasture (S1) and semi-confinement (S2) ¾ were analyzed. The animals were fed two different diets: 30% of the dairy requirements of net energy supplied by concentrate during all the lactation (R1), and 60% of the requirements from 3rd to 13th week of lactation and 15% from 14th until the end of lactation (R2). Blood samples were taken to evaluate glucose (Gl), hemoglobin (Hb), and hematocrit (Ht) levels. […]

The goal of this study was to evaluate the intake of nutrients and the total and partial apparent digestibility of sugar cane + citrus pulp (ScSCp), cassava hulls + citrus pulp (ChSCp) and cassava root + citrus pulp (CrSCp) silages. The basal diet with corn silage (CS) and soybean meal composed 60% of the total dry matter of ChSCp and CrSCp treatments. Four castrated crossbred (HxZ) steers were, canulated in the rumen and in the duodenum and confined according to […]

ABSTRACT – The objectives of this study were to obtain adjustment factors for effects of calf age, dam age and calf Julian birth date on weight gain from birth to weaning (GND) and on visual scores of conformation (C), precocity (P), and muscling (M) and to estimate effects of maternal and individual heterosis on those traits. The analyzed records were from two breeding programs named Natura and Conexão Delta G, totalizing 187,610 purebred and crossbred Nellore x Angus and Nellore […]

The work was carried out at the Equine Production Sector of the Department of Animal Science of the Federal University of Lavras – UFLA, in Lavras – MG, Brazil, with the objective of evaluating the effect of pectin and soybean meal addition on the apparent digestibility of nutrients in horses. The experimental design was completely randomized in a 4×2 factorial arrangement, with four pectin levels (0, 1, 2 and 3% of the DM of the hay of coastcross consumed) and […]

The objective of this study was to determine the protein requirement for broiler breeder hens using factorial method. The requirement of crude protein for maintenance (CPm) was determined using nitrogen balance technique in metabolism assay. The birds were fed with four protein levels in order to get a positive, a close to zero and a negative nitrogen balance. To determine the crude protein weight gain requirement (CPg), two experiments were carried out. The first was calculate to determine the net […]

Groups of crossbred castrated and intact goats were slaughtered at 175, 220, 265 and 310 days of age. The effect of castration and slaughter age on physical-chemical, sensorial and aromatic properties was researched. Calcium content was influenced by castration; however, slaughter age had a significant effect on moisture, protein, iron, calcium and pH. Castration and slaughter age had no significant effect on phospholipids contents, but slaughter age affected the percentage of total cholesterol. Fatty acids were significantly affected by castration. […]

The experiment was conducted at farm Pedrões of the F.C. Agropecuária, located in Uberaba-MG to evaluate the quality of Brachiaria decumbens hays harvested after seed ripening. The hays were submitted to the following treatments: control, anhydrous ammonia (3.0% NH3 in the DM), and urea (5.0% in the DM). The chemical composition, digestibility hays and the performance of steers were evaluated using a complete randomized block design with three treatments and six replications. The ammoniation either with NH3 or urea increased […]

The objectives of this work were to evaluate three protein sources – soybean meal, fish meal and feather meal – and two methods of calculation of rations – the calculated in terms of crude protein (CP), according to recommendations of NRC (1988); and the proposed by the AFRC (1993), and calculated in terms of metabolizable protein (MP) – through the performance of calves. The animals were confined and submitted to five diets, that varied only protein sources in its composition, […]