The objective of this trial was to evaluate the chewing activity of dairy heifers fed diets in which Tifton 85 hay (Cynodon dactylon (L.) Pear) was partially replaced by citrus pulp. Twenty-eight Holstein dairy heifers averaging 12 months of age and 184 kg of BW at the beginning of the trial were blocked by initial BW and, within each block (7 blocks), randomly assigned to one of the following four treatments: 0, 16.6, 33.3, or 50% of a concentrate based […]

The experiment was carried out to study structural and morphologic characteristics of five Pennisetum sp. genotypes (CE 08 A.D., Venezuela, HV-241, Elephant B and Hexaplóide) under grazing during the dry period in Pernambuco Forest Zone. Genotypes were managed under rotational stocking (44 days of resting and four days of grazing period). The experimental design was randomized blocks in a split plot arrangement, and four replications. The genotypes represented the plots, and grazing cycles, the subplots. There was variation in the […]

The objective of this trial was to evaluate the effect of feed restriction during a grazing period of 104 days (phase I) on intake, feed conversion, and digesta load as well as body weight (BW) change and weights of carcass and non-carcass components during a feedlot period (phase II) in crossbred steers. Thirty nine crossbred Holstein-Gyr steers averaging 19.3±5.1 months of age and 202.0±49.1 kg of BW at the beginning of the study were used. Animals were assigned to one […]

The objective of this experiment was to evaluate the fermentative and chemical parameters of four different bulk densities of marandugrass (Brachiaria brizantha) silages. The forage was harvested with 60 days of vegetative growth and 32% of DM. The bulk densities used were 100, 120, 140 and 160 kg DM/m3. Treatments were distributed in a completely randomized design with four replicates. Gas production data were analyzed by repeated measures model. The lower density silages showed greater gas production. Low effluent production […]

The objective of this trial was to evaluate the effect of different dietary fat sources on intake, digestibility, and plasma urea N in feedlot water buffalo steers. Thirteen castrated Murrah steers averaging 297±9 kg of body weigh were assigned to one of the following three treatments: no added fat (control), soybean oil or whole soybean in a completely randomized design. The experiment lasted 84 days with three experimental periods of 28 days each. Samples of feeds, orts and feces were […]

The objective of this trial was to evaluate the effect of replacing soybean meal with sunflower meal on carcass traits and body measurements of Santa Inês lambs. Eighteen intact lambs averaging 90 days of age and 14±1.43 kg of body weight (BW) at the beginning of the study were assigned to a completely randomized design and confined during 87 days. Animals were fed coastcross (Cynodon dactylon) hay ad libitum plus 300 g of one of the following three concentrate mixtures: […]

The objective of this trial was to evaluate the effect of monensin in the apparent digestibility of nutrients in diets with different levels of CP. Twenty-five castrated rams were housed in metabolism cages for 20 days and fed diets with 11.4 or 16.5% of CP (% DM) supplemented or not with 28 mg of monensin/kg of DM. Diets contained 65% of signalgrass hay (Brachiaria decumbens) and 35% of concentrate; a diet containing only signal grass hay was also fed. The […]

Semen samples of five specimens of Prochilodus lineatus (Valencienes, 1847) were used to test the toxic and cryoprotectants effects of six solutions based on BTS (Beltsville Thawing Solution®) 4.5%: A – BTS 4.5% + Methanol 10%; B – BTS 4.5% + DMSO 10%; C – BTS 4.5% + KCl 0.072% + Methanol 10%; D – BTS 4.5% + KCl 0.072% + DMSO 10%; E – BTS 4.5% + KI 0.036% + Methanol 10% and F – BTS 4.5% + KI […]

The aims of this study were to estimate heritability coefficients and genetic trends for visual scores of conformation (C), finishing precocity (P) and musculature (M) in Nelore beef cattle. Variance components and heritability coefficients were estimated by restrict maximum likelihood and breeding values were predicted by an animal mixed model using data from 56,076 animals born between 1990 and 2002. Genetic trends for each trait were estimated by the regression of breeding values on animal birth year. Heritability estimates for […]

The objective of this trial was to evaluate the effect of different dietary fat sources on weight gain, feed conversion, and feeding costs in feedlot water buffalo steers. Thirteen castrated Murrah steers averaging 297±9 kg of body weigh were assigned to one of the following three treatments: no added fat (control), soybean oil or whole soybean in a completely randomized design. The experiment lasted 84 days with three experimental periods of 28 days each. Samples of feeds, orts and feces […]