The present work was carried out with the objective to evaluate the effects of different energy levels offered in the final third of gestation on the ewe-lambs behavior of animals from the Morada Nova breed. The experiment was divided into three treatments – three groups of eight ewes, fed isoprotein diets containing different energy levels (2.0, 2.4, and 2.8 Mcal ME/kg DM), with eight replicates each. There was effect of the treatment on the maternal behavior evaluated variables (vocalization, act […]

This study was carried out to evaluate the performance and characteristics of carcass of broiler chickens fed diets with reduced levels of CP, available P (aP) and Ca, supplemented with phytase and amino acids. The growth phases evaluated were: Phase1, 1 – 21 days old, phase 2, 22 – 42 days old. A completely randomized design was used, with the treatments constituted of five nutritional plans (NP), with six replicates of 25 birds each. The nutritional plans were: NP1 – […]

The experiment was carried out to evaluate sugar cane silage treated with chemical additive: urea 1.5%, sodium benzoate 0.1%, and sodium hydroxide 1.0% on the wet basis, associated with Propionibacterium acidipropionici + Lactobacillus plantarum and Lactobacillus buchneri, plus control silage in a factorial scheme 4 x 3, with three replications. The gas and effluents losses during the fermentation phase, and dry matter recovery were determined. During the aerobic phase were determined the dry matter recovery and aerobic stability through the […]

This study was aimed at calculating the economic values for milk (MY), fat (FY) and protein (PY) yields for a dairy buffalo production system in São Paulo State. The performance, revenues and costs were estimated based on a bio-economic model developed for a herd of dairy buffaloes raised in a grazing system, with roughage supply during the dry season and concentrate throughout the year. Economic values were calculated from the marginal difference of annual profit resulting from the increase of […]

This study was carried out to identify, by using diagnostic research procedures, characteristics of production systems related to the occurrence of ectoparasites. Data of semi-structuralized interviews in 62 farms were analyzed by multivariate statistical procedures. Greater importance was observed for the property area, pasture management and the frequency of the property visits to his establishment. The used method, the season and the frequency of the applications of tick pesticides differed among the control types of ectoparasites. The results reaffirmed the […]

An experiment was carried out with the objective of evaluating the effect of different lysine levels in diets supplemented or not with ractopamine (RAC) on the performance and carcass characteristics of finishing barrows. Forty commercial hybrid swines were distributed to a randomized experimental block design, in a 2 x 2 factorial arrangement, with two digestible lysine levels (0.67 and 0.87%), with adjustment for the others amino acids to achieve an ideal protein relationship, and two levels of RAC (0 and […]

The experiment was accomplished in a greenhouse from May to August of 2005, with the objective of to evaluate the effect of phosphorus and nitrogen fertilization on morphogenetic and structural characteristicas of Tanzania grass. The morphogenetic evaluations included leaf appearance, leaf elongation rate, and stem elongation rate. The structural evaluations measurements were: number of leaves, number of green leaves, number of tillers per plant, and final leaf length. It was used a complete randomized experimental design in 4 x 2 […]

Carcass composition related to commercial cuts and tissue composition (muscle, bone and fat) from leg, loin and shoulder of kid goats crossbred Anglo-Nubian or Boer were evaluated in 20 kids from two different genetic groups (13 ½ Anglo-Nubian × ½ Undefined Breed – UB and 7 ½ Boer × ½ UB). The animals were slaughtered at 10 months of age and average body weight of 29 kg ± 0.08. After 24 hours of cooling (2ºC), the carcasses were separated in […]

The objective of this work was to evaluate forage nutritive value by determining the crude protein (CP), neutral detergent fiber (NDF), and in vitro dry matter digestibility (IVDMD) from forage submitted to some agro-ecologic practices. Two paddocks, each one with 0.15 ha, were used in the evaluation. The elephantgrass was planted in 2001, spaced 3 m between rows. Mixture of oat and ryegrass during the winter period and spontaneous growing species in the summer period has been planted/left between the […]

This research aimed to estimate the maintenance requirements of net energy (NEm) and metabolizable energy (MEm), and the changes in body and gain composition of confined adults non-pregnant and non-lactant beef cows. Thirty six cows were used, 12 were Nellore (NEL), 12 F1 Brown Swiss-Nellore (BSN) and 12 F1 Red Angus-Nellore (RAN). The comparative slaughter method was utilized to estimate the changes of animal body chemical composition during the experimental period. Four animals from each breed group were randomly allocated […]