This trial was conducted at National Beef Cattle Research Center of Brazilian Agricultural Research Corporation (Embrapa Beef Cattle). Forty five F1 Aberdeen Angus-Nellore steers were used to evaluate the effects of different dry seasons feeding schemes on carcass characteristics. The treatments were: control, without supplementation (S/S); supplementation in 2nd dry period (S2S); supplementation in 1st dry period (S1S); supplementation in 1st and 2nd dry periods (S12S) and supplementation in 1st dry period and confinament in 2nd one (S1C2). Animals were […]

The objective of this trial was to evaluate the biological and economical feeding systems feasibility during critical periods as an alternative to reduce the slaughter ages the animals raised in Brachiaria decumbens pastures. Sixty F1s Angus-Nellore weaned calves were randomly assigned in the following treatments: A) no supplementation; B) supplementation during the dry season after weaning; C) supplementation during the second dry season of the animal’s life; D) supplementation during the both dry seasons; and E) supplementation during the first […]

This experiment was conducted to evaluate the replacement of different corn grains (dry corn grain, reconstituted grain corn silage and high-moisture grain corn silage) on th epreformance of feedlot lambs. Sixty lambs (males and females) were randomly assigned to five treatments with twelve replicates and fed iIsoprotein and isoenergetic diets, in different treatments: T1= (RCGS) reconstituted grain corn silage; T2 = (DCG) dry corn grain; T3 = 50% RCGS + 50% DCG; T4 = (HMGCS) high-moisture grain corn silage; T5 […]

Seventy-one animals from two genetic groups, ½ Angus – ½ Nellore (AN) and ½ Simmental ¾ ½ Nellore (SN) with different growth potential, which belonged to the Projeto Cruzamento Embrapa 1 were used. These groups were submitted to seven castration treatments. It was observed that the SN animals delayed 14 more days in feedlot in order to be slaughtered in the same degree of finishing as the AN (131 days versus 117 days, respectively) animals. The other evaluated traits, slaughter […]

Fourty Aberdeen Angus steers were used to evaluate the effects of monensin, soybean oil and nitrogen source (soybean meal or urea) on feedlot performance of steers fed 90% concentrate diets. The monensin decreased dry matter intake of soybean meal supplemented diets and decreased the body weight at 56 and 112 days. The soybean oil decreased the average daily gain from days 57 to 112 and 1 to 112. While, monensin showed a decreased on the average daily gain in these […]

The objective of the experiment was to evaluate, during the growth phase, the dry matter intake, weight gain and feed to gain conversion of young bulls and steers, castrated at eight month, from two breeding systems, straightbred (Charolais – C and Nellore – N) and crossbred (1/2 CN, 1/2 NC), as well as to measure the resulting heterosis. The animals were confined from nine to twelve months and fed a 15% crude protein diet and a 70:30 forage to concentrate […]

ABSTRACT – Thirty six lambs (18 male and 18 female) from three different genetic groups: 12 lambs Texel x Bergamacia, (T B), 12 lambs Texel x Santa Inês (T S) and 12 lambs pure Santa Inês (SI) were fed with three different experimental diets: A – without coffee hulls; B – with in natura coffee hull and; C – with coffee hull, treated with urea and whole ground soybean seed. The hot carcass weight (CQ), cold carcass weight (CF), hot […]

The objective of this work was to study the effect of the substitution of cottonseed meal by canola meal on weight gain, feed intake, feed:gain ratio and dressing percentage of the feedlot Nellore heifers. Thirty Nellore heifers averaging initial of 225 kg LW and 20 months of age were randomly allotted to two treatments (cottonseed meal – COM or canola meal – CAM as protein sources) with 15 animals for each treatment. The experiment was carried out in three periods […]

The objective of this experiment was to evaluate the carcass and meat characteristics of Hereford (H), 5/8 H 3/8 Nellore (N), 1/2 H 1/2 N and 1/4 H 3/4 N steers, feedlot finished, from 20 to 24 months of age. Twenty-four steers randomly taken from the same herd were used. The diet contained, in a dry matter basis, 12.7% of crude protein and 57.5:42.5% forage:concentrate ratio. The forage was composed by corn silage + sugar cane (relation 1:1). The slaughter […]

The net requirements of energy for the maintenance of bulls from four Zebu breeds (Gyr, Guzera, Mocho-Tabapuã and Nellore) were estimated with 63 bulls averaging 24 months of age and 366 kg initial LW and (15 Nellore and 16 from the Gyr, Guzera and Macho-Tapabuã). Fifteen animals, four Gyr, Guzera and Mocho-Tabapuã breed and three Nellore breed, were slaughtered at the beginning of the trial and the remaining were allotted to four groups of 12 animals, being three animals from […]