The morphogenetic and structural characteristics and herbage accumulation were assessed of Panicum maximum cv. Tanzania subjected to two cutting heights (25 and 50 cm) and three cutting intervals (corresponding to the appearance of two, three and four leaf per tiller). A 2 × 3 factorial arrangement was used in a randomized complete block design with three replications. Leaf appearance rate decreased and phyllochron increased with low cutting frequency. In general, the final leaf length was shorter for the 25 cm […]

This study was carried out to determine and compare the apparent digestibility of dry matter (DM), crude protein (CP), crude fat (CF), gross energy (GE), and the apparent availability of minerals (P, Ca, Mg, Mn, Cu, and Zn) of emergent (leaf and petiole), submerged (root and rhizome) and total biomass meal of water hyacinth for Nile tilapia. Four diets were prepared, containing 0.10% chromic oxide-III, one being the reference diet (purified) and the others containing 30% of each ingredient. The […]

With the objective of assessing the development of organs of the digestive tract and the enzymatic profile α-amylase, lipase and trypsin, an experiment lasting 21 days was carried out using one-day-old male Avian Farm broiler chicks, reared in heated batteries and fed ad libitum with water and purified diets containing all L-essential amino acids, glutamic acid (nonspecific nitrogen source), minerals and vitamins. A randomized complete design was used with four replications of ten birds. At one, seven, 14 e 21 […]

This study was carried out to evaluate 14 genotypes of six winter species for yield and nutritive value of early forage and silage or regrowth grain. The experiment was in a randomized complete block design with three replications, so that the plots consisted of seven 5.0 m-long rows spaced at 0.2 m. The seeding date was April in the three study years and fertilization followed the recommendations for the crops. During the tillering period and after cutting, urea was applied […]

The experiment was conducted to evaluate the effects of urea addition and two storage periods on the nutritive value and fermentation profile of sorghum silage. A randomized complete design was used, in a 4 × 2 factorial arrangement, with urea doses (0; 2.5; 5.0 and 7.5% in DM) and two storage periods (30 and 60 days). The PVC silos, 50 cm high and 10 cm in diameter, were used to ensilage the sorghum. Urea doses had a quadratic effect on […]

The objective of this study was to evaluate the effects of ractopamine and enzyme phytase on the performance and carcass characteristics of finishing pigs. Three hundred and fifty-four commercial type barrows were used from a single source with 94.1 ± 5.7 kg initial body weight in a randomized complete block design, with six treatments and five replications with 11 or 12 animals per experimental unit evaluated. The following feeds were: control diet based on tables of nutritional requirements; (A) diet […]

The objective of this study was to estimate the genetic correlations between visual scores and the carcass traits measured by ultrasound, in Nellore breed cattle, using the bayesian statistics by Gibbs Sampling, in the linear-threshold model. The morphological categorical traits of musculature, physical structure, conformation and sacrum were studied, evaluated at 15 and 22 months. The carcass traits of the longissimus muscle area, backfat thickness, rump fat thickness and hip height were evaluated. Visual scores should be used as selection […]

The objectives of this study were to analyze the economic viability of meat lamb production systems and identify the components with greatest influence on production cost. The study was carried out in two stages. Stage 1: comparison of finishing lamb production systems: (1) lambs weaned at 60 days and finished on pasture; (2) lambs with mother on pasture; (3) lambs with mother on pasture plus concentrate (1% BW/day) in creep feeding; and (4) lambs weaned at 60 days and feedlot. […]

The study verified the influence of different nutritional levels of the dams, before parturition, the weaning age of the lambs and the finishing system on lamb muscle fiber morphology and meat quality. Ile-de-France × Bergamacia crossbred dams grazing on natural grassland were divided into two groups: 1) nutritional supplement 30 days before the parturition (SUPL), and 2) no nutritional supplement (NS). These groups were further subdivided by weaning age of the lambs, which corresponded to either 45 or 60 days. […]

The objective of this study was to evaluate the influence of body condition at birth on Alpine goat productive parameters in early lactation. Sixty-eight females were assigned to three groups according to the body condition score (BCS) – low (1.00 – 2.75); intermediate (2.75 – 3.50) and high (3.50 – 5.00) and evaluated from kidding to the eighth week of lactation. The feed intake and milk production were recorded on a daily basis and the body weight, body condition score […]