The objective of this experiment was to evaluate dry matter yield and loss of grazing due to animal trampling in response to sowing density and spacing between lines in the planting. Sorghum hybrid 1P400 was submitted to six treatments, composed of three sowing density combinations (12; 16 and 20 kg/ha of seeds) and two spacing between lines (0.40 and 0.80 m). Sorghum hybrid 1P400 was sowed in two seasons, at the end of spring (December 3rd, 2005) and the other […]

The objective of this research was to evaluate the forage dry matter yield and its morphological components, height and pasture falling index, bulk density and forage nutritional value in Brachiaria decumbens pastures deferred for 95 days under four strategies of nitrogen fertilization. It was studied four strategies of nitrogen application at the beginning and at the end of the rainy season, respectively (0-0, 100-0, 50-50, 0-100 kg N/ha) evaluated in three vertical strata at every 20 cm in a randomized […]

This study was conducted to evaluate the displacement and permanency patterns of grazing cattle on Brachiaria decumbens deferred during 95 days under four strategies of nitrogen application (0-0, 0-100, 50-50, 100-0 kg N.ha-1), at the beginning and at the end of the rainy season. During the deferred period, in the dry season, forage yield, canopy structural characteristics, and displacement pattern were evaluated. Four steers were used in Ten grazing tests of 45 minutes and 14 heifers Girolanda, monitored every 10 […]

Production of better quality forage can be achieved by changing grazing method, from continuous grazing by rotational grazing, associated with fertilization practices, especially nitrogen fertilization. It was evaluated during the rainy seasons of 2002/03 and 2003/04 the effect of nitrogen doses (0, 100, 200 and 300 kg ha-1) on dry matter yield and on chemical composition (crude protein, ADF, NDF, hemicellulose, cellulose and lignin) of a Urochroa decumbens cv. Basilisk pasture, managed under rotational grazing. In addition, it was evaluated […]

The objective of this work was to check the effect of exogenous estrogen, in early phase of estrus cycle on the induction of estrus and on ovarian dynamics of dairy cows. By considering that PGF2α does not regress the corpus luteum in less than five days after the estrus, an alternative for the reduction of the estrus interval in the beginning of the cycle would be the use of estrogen. It was used 16 Holstein-zebu crossbred cows cycling regularly, without […]

To evaluate the effect of using urea in the diet on ovarian follicular dynamics and plasma urea and progesterone concentration, an experiment was carried out with 29 Alpine goats randomly distributed into four diets, each one containing 0%; 0.73%; 1.46% or 2.24% of urea on total dry matter. The follicular dynamics was monitored daily by ultrasonography. The estrous cycles were characterized by occurrence of two, three, four or five follicular waves. The emergence day of the first follicular wave in […]

The objective of this study was to evaluate different osmolarities and incubation times during the hiposmotic test and its correlation with cryopreservation of semen of Zebu bulls. It was used 30 ejaculates from six mature Nelore bulls. It was performed physical and morphological evaluation, supravital staining classification and hiposmotic test in the fresh semen. In the hiposmotic test, solutions with osmolarities of 60, 100, 150 mOsm/kg and distilled water (19 mOsm/kg) were used at 15, 30 and 60 minutes of […]

It was used 10,238 weekly test day records from 388 first lactations of Saanen goats with the objective of comparing random regression models (RRM). Firstly, it was compared five models, whose exponential terms of Wilmink function assumed the following values: -0.0350; -0.0500; -0.0565; -0.0680 and -0.1000 (W0350, W0500, W0565, W0680 and W1000, respectively) by considering homogeneity of residual variance over the lactation period. The value -0.0500 was kept in the model W0500 whereas models W0350, W0565, W0680 and W1000 used […]

The objective of this study was to characterize the sexual development in Anglo-Nubian male goats raised in semi-intensive system. Eight animals were monitored every fifteen days, from the 12th to the 44th week for age at penis detachment, live weight, scrotal circumference, seminal parameters (volume, aspect, concentration, wave motion, progressive individual motility, vigor and spermatic abnormalities) and serum testosterone levels. Serum testosterone levels were determined in blood samples collected at the 20th, 28th and 38th weeks of age. Penis detachment […]

The objective of this experiment was to study yolk pigmentation stability in omega 3 (ω-3) enriched eggs stored under different temperatures in zeaxanthin equivalent (by using visible light spectrophotometer) and visual score (with values obtained by yolk color fan) and to verify the correlation among those methodologies. Three hundred big eggs from Isa Brown hens were distributed into two lots each one containing 150 eggs, stored at room temperature (26.5ºC) or under refrigeration (7.9ºC) for 35 days. It was used […]