The experiment was conducted over two years to evaluate the residual effect of phosphate fertilizer application on the DM yield and the soil P critical levels for maintenance of elephantgrass (Pennisetum purpureum Schum. cv. Napier) crop. The experimental treatments were arranged according to a 2 x 2 x 5 factorial treatment combination of: two forms of P application (located on the bottom of the furrow or mixed with the soil in the furrow), two spacing of the planting lines (0.5 […]

It was investigated the effects of fibrolytic enzymes (cellulase and xylanase) on the microbial protein synthesis efficiency and enzymatic activity of b-1,4-endoglucanase (cellulase) in animals receiving diets with corn silage and Tifton 85 hay (Cynodon spp.). Eight bovines fitted with rumen and duodenum cannulas were randomly assigned to two replicated 4 x 4 Latin squares with a 2 x 2 factorial arrangement of treatments (two forage sources with or without fibrolytic enzymes). The commercial enzymatic complex used in this trial […]

The objectives of this trial were to estimate gain composition and energy and protein requirements for weight gain of purebred and crossbred Nellore. Sixty young bulls averaging 10 to 11 months of age from four genetic groups: Nellore, F1 Nellore x Angus, F1 Nellore x Brown Swiss and F1 Nellore x Simental and initial average body weights of 286, 309, 333 and 310 kg, respectively, were used in this study. A completely randomized design was adopted and bulls from the […]

In this study different energy supplements for feedlot calves weaned at 80 days of age and averaging 90 kg of body weight were evaluated. The following energy sources were used: corn grain (CG), rice bran (RB), soybean hulls (SH), corn grain + rice bran (CG + RB), soybean hulls + rice bran (SH + RB) or corn grain + soybean hulls (CG + SH). The diets were isonitrogenous (13% crude protein) with a 50:50 forage:concentrate ratio. Sorghum silage (AG-2005E) constituted […]

The objectives of this trial were to determine the apparent digestibility coefficients (ADC) of crude protein and amino acids for two species of free floating aquatic macrophytes (Eichhornia crassipes and Pistia stratiotes) by Nile tilapia (Oreochromis niloticus) and to determine the water quality of digestibility aquariums in relation nitrogen and phosphorus concentrations. Tree feeds were developments, containing 0.10% of chromic oxide – III, one being the reference diet (purified) and the others containing 30% of aquatic macrophytes. The Nile tilapias […]

The objective of this study was to estimate (co)variance components and genetic parameters, such as heritabilities and correlations, and genetic and phenotypic trends for birth weight (PN), weaning weight (PD) and 205 day adjusted weight gain (GNDA). A total of 23,369 records on animals, born from 1980 through 2000, collected by PROMEBO – beef cattle improvement program of Associação Nacional de Criadores Herd Book Collares, were used. Of these animals, 16,593 had record of PN, 22,530 had of PD and […]

This research aimed to compare dry matter digestibility coefficient (DMDC) of horse diets by total feces collection (TC) and internal markers, indigestible cellulose (iCEL), indigestible acid detergent fiber (iADF) and acid insoluble ash (AIA). Sixteen adult mares of Mangalarga Marchador breed averaging from 3.5 to 18.4 years and 394.80 ± 46.22 kg were assigned to a randomized block design with four replicates. Diets were formulated to be isoprotein and isoenergetic and composed of coastcross hay (Cynodon dactylon cv. Coast cross) […]

Two inoculated corn silage experiments are reported. In the first one, pH value, ammonia nitrogen in total nitrogen (N-NH3/Total N), chemical composition and in vitro drymatter digestibility of corn silages with or without enzymatic-bacterial inoculants were evaluated in laboratory silos. A 6 x 3 factorial arrangement of treatments, with six fermentation periods (01, 03, 07, 14, 28 and 56 days) x three inoculants (control and two commercial inoculants: Maize All (Alltech of Brazil) and Biomax (Christian Hansen) was used in […]

Production of 56 feedlot bulls from three different genetic groups averaging 18 months of age and fed ad libitum or restricted was evaluated in this trial. Twelve animals were slaughtered at the beginning of the study and were used as references. The remaining 16 genetically selected Nellore, 12 ordinary Nellore, and 16 genetically selected Caracu with initial average weights of 404, 345 and 434 kg, respectively, were assigned to a completely randomized design with a 2 x 3 factorial arrangement […]

This study was carried out to evaluate the productivity, utilization and sward structure of a mixed massaigrass (Panicum maximum x P. infestum, cv. Massai) and forage peanut (Arachis pintoi Ac 01) pasture, intermittently stocked at three daily herbage allowance levels (9.0, 14.5 and 18.4% of live weight). In each grazing cycle, dry matter (DM) accumulation rates, defoliation intensity (%), grazing depth (%) and grazed horizon (cm) were evaluated. The structure of massaigrass tussocks was characterized in both dry and rainy […]