This experiment was designed to adjust the biomathematical models of the phosphorus (P) flow between the physiologic or anatomical compartments of horses and to evaluate the P absorption and availability in horses, fed diets with different P levels from dicalcium phosphate. The model, deterministic and compartimental, was adapted of Aubert and Milhaud, in which the digestive tract and the bone and soft tissues represented the compartments in bi-directional flow with the blood. The informations on metabolism and kinetic of P […]

The work was carried out to evaluate the body composition and the net requirements of protein and energy for weight gain of dairy calves in the beginning of the productive life were determined. Eighteen Holstein bulls calves at newly born to 110 days of age weighing between 30 and 100 kg were used. Six animals were slaughtered at the beginning of the experiment (to birth) and other twelve animals were full fed until a pre-established slaughter of age. Six animals […]

A trial was conduced to evaluate the effects of Tifton hay (Cynodon dactylon) supplemented with multinutrient blocks formulated using different molasses levels on digestibility, intake, and blood urea level. Four Hereford steers, one year old, weighing on average 196 kg in the beginning of the experiment, were assigned to a 4 x 4 latin square. The treatments were: Tifton hay and Tifton hay plus supplementation with either 25, 30, 35, and 40% molasses levels in multinutrient blocks. However, to include […]

One experiment was conducted to evaluate the influence of reduction of the crude protein (CP) level of ration with amino acid supplementation on performance of castrated males swines maintained in a termoneutral environment (22ºC). A total of sixty crossbred swines (Landrace x Large White), with average initial weight of 15.0 kg and 53.1 days old, was allotted to a completely randomized design with five treatments (18, 17, 16, 15 and 14% CP), six replications and two animals per experimental unit. […]

Red clover is a temperate legume species that shows good dry matter yield potential and forage quality, being indicated to supplement livestock animals during the cool season in the Southern part of Brazil. The objective of this experiment was to study seed yield in red clover through the use of path analysis, aiming to generate basic information to be used on breeding program or in management strategies, which lead to an increase on seed yield, natural reseeding and thus to […]

The objective of this work was to estimate the correlations among measurements taken in vivo with ultrasound equipment with some carcass characteristics measured after slaughter. Twenty two Nellore steers, with average shrunk body weight of 279 kg and 24 months of age, were fed by 98 days with high concentrate diets. The shrunk body weight, the ribeye area (AOLU) and the fat thickness (EGSU) over the Longissimus dorsi muscle between 12ª and 13ª ribs, were measured at 28 days intervals. […]

It was utilized data from 188 animals from ten genetic groups. For the statistical analysis, the animals were grouped into three subgroups according to age, sex and diet. Thus, the subgroups analyzed were: 1) intacted yearling males receiving the “a” ration: 39 Nellore (N), 12 Brangus (BR), 8 1/2 Simmental – 1/2 Nellore (SN), 8 1/2 Caracu – 1/2 Nellore (CCN), 21 1/2 Valdostana – 1/2 Nellore (VAN); 2) intacted weaned males receiving the “b” diet: 12 N, 12 1/2 […]

Beef tenderness is influenced by the activity of the calpain proteolytic system during postmortem aging. Calcium propionate increases blood calcium concentration enough to active these calcium-dependent proteases, and improve beef tenderness The objectives were to evaluate calcium propionate orally supply in quali-quantitative carcass characteristics of beef cattle. In this study, 24 steers (3/4 Simenthal+1/4Nellore) received 0 or 630 g calcium propionate orally, 12 hours before slaughter. After slaughter, tenderness (shear force), cooking losses (1, 8 and 15 days of aging […]

Two experiments were carried out, with the aim of evaluating the use of corn processed or not by extrusion, in the feeding of growing rabbits. In the experiment 1, 21 White New Zealand rabbits, 12 males and 9 females, with 55 days of age, were used on digestibility assay, with the aim of determining the nutritional value of corn, extruded or not. The rabbits were distributed in a completely randomized design with three treatments and seven replications, with one reference […]

This research was developed to evaluate the agronomic characteristics, chemical composition of the whole plants and their fractions of eight sorghum hybrids, to identify the adapted plants to dry environmental conditions and appropriated to silage production. The experiment was conducted according to a randomized block design, with eight treatments and three replications, to study the commercial hybrids AG-2005, BR-700 and MASSA-03, and the non commercial hybrids 498111, 65E3, 698005, 698007 and 699005. There were no significant differences among hybrids in […]