Previous and present days open were fit simultaneously as fixed effects in a sire model for 305 day milk production (L305) containing yet the fixed effects of herd-year-season, level of Holstein blood, age of cow as covariant (up to 3rd degree) and the random effects of sire and cow. A relationship matrix including the bull, his sire and his dam was used. The same model without age of cow was used for 305-day mature age equivalent milk yield (PROAJU). The […]

The objective of this experiment was to evaluate the performance of feedlot beef cattle fed diets supplemented with protein concentrate based on cottonseed meal (CSM) urea (UR) or starea (ST), using corn silage as forage. The feedlot period was 80 days. The diets were constituted maintaining the forage:concentrate proportion in the 63:37 level, with nearly 13% CP. No difference was observed in daily weight gain during the experimental period among the CSM, UR or ST treatments (1.14, 1.17, and 1.23 […]

Predicted transmitting ability (PTA) of milk yield of 529 sires using animal model (MA), sire model (MT) and herdmate contemporary comparison method (MCR) were calculated and compared by means of correlation’s rank and values, reliability, differences among PTA and percent of coincidence in the selection of the best bulls. Two sets of data were considered one contained up to five lactation per cow and other with production data at first lactation. Data of 12,762 lactations of 5757 Gyr and crossbred […]

The effects of genetic group and nutritional level on relative size of internal organs were studied. Sixty-three bulls, 16 Gyr, 16 Guzera, 15 Nellore and 16 Mocho de Tabapuã, averaging twenty four months of age, and initial live weight of 376.4, 357.6, 362.0, and 368.6 kg, respectively were used. The animals from each breed were randomly assigned to five groups. One group was immediately slaughtered (AB), three groups were full fed, in individual free stall, a diet containing 50% of […]

With the objective to determine the combining ability of broiler matrix lines by means of factor analysis, single crosses (full diallel) within female lines (PP, KK and VV) were used. The evaluated traits were egg numbers from the 24th-32nd(P1), 32nd-40th(P2), 40th-48th (P3), 48th-56th (P4), 56th-64th (P5), 22nd-66th (P6), 32nd-66th (P7)), 40th-66th (P8), 48th-66th(P9), 24th-40th (P10), 24th-48th (P11)) and 24th-56th (P12) week of age. In the factor analysis, two factors were used, with the meaning biological factor defined after the factor […]

This work was conducted to evaluate the chemical body composition of sixty three young bulls, from the Gyr, Guzera, Mocho Tabapuã, Nellore breeds, in feedlot, averaging, respectively, 376.4, 357.6, 362.0, and 368.6 kg of initial live weight. The animals from each breed were divided into five categories: initial slaughter, full fed diet containing 50% concentrate until the individual slaughter weights of 405, 450 and 500 kg, respectively, and finally the category restricted feeding fed the same diet supplying levels of […]

The effects of five dietary concentrate levels on the body composition and on the net requirements of protein and energy for weight gain were evaluated. Twenty nine F1 Simental Nellore bulls, averaging 17 months of age and initial 354 kg LW, were used. Five animals were slaughtered at the beginning of the experiment, as a reference, to estimate the initial empty body weight (EBW) and the initial concentrations of fat, protein and energy. The remaining animals were allotted to a […]

The objective of this experiment was to evaluate the effects of the concentrate level in the diets on the intakes and total and partial apparent digestibilities of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), neutral detergent fiber (NDF) and total carbohydrates (CHO). The effect of collections carried out during the day and the night, for the DM and OM total and partial apparent digestibilities, was also evaluated. Four Nellore bulls, fistulated in the rumen, abomasum […]

The objective of this work was to evaluate the spray-dried porcine plasma (SDPP) in the diet of 21 day-weaned pig. One hundred and twenty piglets averaging 5.75 kg of initial weight were used to test the inclusion levels of 0, 2.5, 5.0, and 7.5% of porcine plasma on phase 1 (from 0 to 14 days) and its effects on phase 2 (from 15 to 28 days). Except for the piglets in the control diet, all other animals were fed a […]

With the aim to study carcass traits, nine Gyr, nine Guzera, nine Nellore and nine Mocho Tabapuã bulls, averaging, respectively, 357.6, 362.0, 368.6, and 376.4 kg of initial live weight and 24 months of age were used in this study. The animals from each breed were randomly assigned to individual pens and were full fed a diet containing 50% concentrate, dry matter basis, until the slaughter weights (405, 450 and 500 kg LW). At slaughter the empty body weight was […]