The experiment was carried out with 20 intact Holsteins male calves, average live weight of 75 kg and 76 days old, to evaluate the performance and the economical viability to produce veal calves. The calves were fed diets containing 45, 60, 75 and 90% of concentrate. Diets were composed of coastcross hay, ground corn, soybean meal and mineral mixture, fed ad libitum. The experimental design was a complete randomized blocks, with four treatments and five replicates. Before the beginning of […]

An experiment was conducted to evaluate the effect of environmental temperature on the bullfrog performance in the growing phase. Four hundred and fuve frogs, weighing 37,5±1,5 grams, were assigned to a randomized experimental design with three treatments (20,2±0,7°C, 25,1±0,4°C and 30,2±0,5°C), five replicates (boxes) and 27 frogs in each replicate. The experimental period was of 45 days, being ten days for adaptation of the frogs to the installations and the feeding. The daily feeding comprised one commercial ration of trout […]

A laboratory study was carried on the transmission of ultraviolet radiation (UV, 250 to 360 nm wavelength) through the haircoat and the skin of cattle. Fresh samples of skin were measured under a solar simulator, taking account of the pigmentation of hair and skin and the structural characteristics of the haircoat (coat thickness, hair diameter, hair length, angle of the hairs to the skin surface, number of hairs per unit area), which defined the average free path length of a […]

The experiment was carried out with 20 Holstein intact male calves to study the carcass characteristics of these animals fed with diets containing 45, 60, 75 and 90% of concentrate. Diets were composed of coastcross hay, ground corn grain, soybean meal and mineral mixture fed ad libitum. A completely randomized blocks experimental design, with four treatments and five replications, was used. Before the beginning of the experiment, all animals were submitted to the same nursing system. The experimental period was […]

The digestibility of ether extract (EE), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose (HCEL) and cellulose (CEL) of a total ration was evaluated. The ration, composed by 44.3% Brachiaria hay, 55% concentrate and 0.7% mineral mixture, was fed to animals of different genetic groups (Gyr, Nellore, Guzera, Santa Gertrudis and Caracu), using total feces collection and internal marker (acid detergent lignin – ADL). The data were analyzed in a completely randomized design, with three replications […]

The influence of the level of forage intake on the degradability of particles of elephant grass in the sections of gastrointestinal tract (GIT) of bovines and on some traits of ruminal kinetics was studied. A completely randomized split plot design was used, with twelve treatments in the main plots (a 2×6 factorial, comprising two levels of feeding: restricted – NA1 and unrestricted – NA2, and six slaughter times) and the five sections GIT in the split plots. Thirty-six steers maintained […]

The experiment was conducted utilizing hull and dehydrated pulp of coffee cultivars Catuaí, Rubi and Mundo Novo. Pulp was obtained by moist pulping in a mechanical pulper and dried up to 13% moisture. Materials were stored in raffia bags in ventilated, moistureless environment and sun sampled every 90 days. 400 mg of each sample (DM and NDF) were incubated in vitro in triplicates in a water bath at 39ºC. The cumulative gas production was obtained at 1,2,3,4,5,5,12, 18, 24, 30, […]

The dry matter intake and daily weight gain prediction of cattle by Cornell Net Carbohydrate and Protein System (CNCPS) for Brazilian conditions were evaluated. Several published thesis from Departamento de Zootecnia da Universidade Federal de Viçosa were used as a data source for this work, which contain results referent to dry matter intake and daily weight gain of the animals. The available data were tested by CNCPS to compare the estimate and absorved dry matter intake and daily weight gain. […]

Fifteen growing buffaloes of the Mediterranean breed were fed in feedlot for aproximately 140 days with the objective to evaluate three different levels of energy ingested on carcass characteristics. The animals were slaughtered when they reached body weight above 450 kg. The average body weight was 465 kg +/- 16.29 kg. The average metabolizable energy intake estimated for the three treatments were: 18.23, 19.54 and 21.74 Mcal/animal/day. There were no significant differences among treatments in the hot and cold dressing […]

This work was carried out, using 15 dairy cows (Holstein x Gyr) full fed isoproteic diets with 60% silage and 40% concentrate in the dry matter (DM) basis and 0, 0.7, 1.4, and 2.1% urea, correspondent to 2.08, 4.01, 5.76, and 8.07% of crude protein levels in the form of non protein nitrogen compounds (NNP), with the objectives to evaluate the intakes and the apparent digestibilities of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), total […]