The objective of this was to evaluate the effect of chemical treatments with urea (3 or 5% DM) and anhydrous ammonia (3% DM) applied to the post-harvest hay residues of Brachiaria brizantha cv. Marandu that contained different moisture contents (15, 25 or 30%). A randomized block design was used with eight treatments and four replications (defined as the bale layers within the hay stacks). The hay treated with 3% anhydrous ammonia and 15% moisture content reduced the levels of neutral […]

The objective of this study was to evaluate the effect of digestible threonine levels on performance and carcass composition of barrows of high genetic potential for meat deposition. Eighty barrows with initial weight of 95.87 ± 1.26 kg were distributed in a randomized block design, with five treatments (0.470; 0.497; 0.528; 0.557; 0.587%, corresponding to digestible threonine:digestible lysine ratio of 58.0; 61.0; 65.0; 69.0 and 73.0%, respectively) with eight replications and two animals in each experimental unit. The experimental feeds […]

Two experiments were performed to determine the effects of replacing the neutral detergent fiber from sugarcane bagasse with soybean hulls neutral detergent fiber in high concentrate diets on lamb feeding behavior and apparent nutrient digestibility. In the first experiment, 60 ram lambs with 16.4 ± 0.3 kg body weight and 67 ± 2 days old were allotted to a complete randomized block design as a 2 × 2 + 1 factorial arrangement of treatments, consisting of two neutral detergent fiber […]

The carcass and meat characteristics were assessed of Devon steers finished in feedlot (CONF), temperate pasture ( ryegrass pasture – Lolium multiflorum Lam -PTEM), or tropical pasture (association of millet pasture – Pennisetum americanum (L.) Leeke and Alexander grass – Brachiaria plantaginea –PTRO). At the beginning of finishing the average weight of the steers was 320 kg and the age was 15 months. The animals in feedlot were fed feeds with 60:40 roughage:concentrate and slaughtered with similar weights of 388.3; […]

The influence was assessed of protein and mineral supplementation on the ingestive behavior of pregnant heifers on a native grassland dominated by capim-annoni-2 (Eragrostis plana Ness) supplementation with common salt, mineral salt, protein salt and protein salt and reproduction salt (1:1). The hypothesis was tested that different mineral and protein salt supplements could promote alterations in the animal grazing ingestive behavior. The study was carried out in a 37 ha area of native pasture invaded by capim-annoni-2, divided into 8 […]

The objective of this study was to assess the bionutritional efficiency of crossbred F1 Red Angus × Nellore (½ RA ½ N) and F1 Blonde D’Aquitaine × Nellore (½ BA ½ N) young bulls finished on feedlot and slaughtered at 480, 520 and 560 kg body weight. A completely randomized experimental design in a 2 × 3 (genetic group × slaughter weight) factorial arrangement with six replicates was used. The ½ BA ½ N young bulls showed higher kidney, pelvic […]

The effect was asessed of adding glutamine, nucleotides and spray-dried swine plasma on the performance, intestinal mucosal structure and immune response of piglets weaned at twenty one days. Two hundred and fifty two piglets, initial weight 6.35 ± 0.80 kg, were used placed in a randomized complete block deaign conducted in seven treatments, six replications and six animals per experimental unit. The initial weight of the animals was considered in the formation of the blocks. The treatments consisted of: the […]

The objective of this study was to verify the stage of sexual maturity, occurrence of the testicular format and the relationship among reproductive characteristics. Data were used from 5903 Nellore bulls averaging 21 months submitted to the soundness evaluation from 1999 to 2003. At the time of the evaluation, the following characteristics were recorded: scrotal circumference at soundness evaluation (31.99 ± 2.23 cm), left testicular length (11.21 ± 0.98 cm) and right testicular length (11.26 ± 0.97 cm), left testicular […]

The aim of this work was to verify if the presence of trees and its height in formed silvipastoral systems with eucalyptus planted in rank can modify the microclimate and improve the environment for bovine raising during the day in summer. It was evaluated the microclimate of the environment in formed silvipastoral systems in rank of eucalyptus with 8 m, 18 m and 28 meters of height, compared to a system no shade in the summer. The experimental design was […]

The objective of this study was to evaluate the effect of monensin, yeast complex, unsaturated fatty acids and amino acids on dry matter and nutrient intake, total and partial digestibility and ruminal parameters of ruminal fermentation (pH, ammonia nitrogen concentration and short chain fatty acids), the protozoa population and methane production. Six castrated steers, body weight 530 ± 15 kg were used, receiving yeast complex, polyunsaturated fatty acids and amino acids (5 g/dia), monensin (5 g/dia), caulim (5g/dia, used as […]