The traditional method of total collection was used to determine the values of apparent metabolizable energy (AME), corrected apparent energy (AMEn), true metabolizable energy (TME) and corrected true energy (TMEn) of eleven feedstuffs and the respective coefficients of metabolizability of GE. The feedstuffs were as follows: three samples of poultry by-product (PBP), three of feather meal (FM), two of meat and bone meal (MBM), two of swine viscera meal (SVM) and one of viscera and feather meal (VFM) of different […]

Data from Hereford and Nelore breeds and their crosses were used to estimate the effect of genotype and environment interaction on weaning and yearling weights. The statistical analyses were performed by the least-squares method using models that included region, contemporary group within region, month of birth and sex of the calf, linear and quadratic effects of age of the calf and age of the cow, both nested within sex, and the genetic group and genetic group × region interaction effects. […]

The effect of different methionine + cystine (Met+Cis):total lysine (Lis) ratios on performance and egg quality for semi-heavily laying hens was evaluated. One hundred and twenty Lohmann Brown hens with 44 weeks old were allotted to a completely randomized design with with five replicates and four treatments, as follows: T1= 0.76 Met+Cys:total Lys ratio or 0.70% of Met+Cys and 0.92% of total Lys; T2 = 0.83 Met+Cys: total Lis ratio or 0.71% of Met+Cys and 0.85% of total Lys; T3 […]

This experiment was carried out in a greenhouse during the spring to study combinations of nitrogen and sulphur rates on Brachiaria brizantha cv. Marandu growing in nutrient solution and using ground quartz as substrate. It was set in a fractionated 52 factorial arrangement, with five rates of nitrogen and five rates of sulphur. The resulting 13 combinations were, in mg L-1: 14 and 3.2, 14 and 32, 14 and 80, 126 and 12.8, 126 and 64, 210 and 3.2, 210 […]

The objective of this study was to develop and validate a model to estimate the EE apparently digestible fraction from different cattle diets. True digestibility coefficients and metabolic fecal contribution were the main parameters fitted to the model. The estimation method for both parameters was based on the Lucas test. The dataset used to build the model contained 48 and 60 experimental means for lactating cows and growing and finishing cattle, respectively. Data were taken from 24 experiments (12 experiments […]

The objectives of this trial were to analyze the skin histology and to evaluate the influence of tanning technique and the direction removal of samples on skin quality of silver-plated carp (Hypophtalmichthys molitrix). Twenty-three fishes were sacrificed and the skin was removed for tanning. Samples of three fishes were settled in formol 10% and, after inclusion in paraffin, the samples were cut with approximately 5 mm of thickness and colored by the hematoxylin-eosin technique (HE). After skin tanning, the samples […]

Twenty crossbred bulls (1/2 and 3/4 Bos taurus x Bos indicus) averaging 24 months of age and 532 kg of body weight at the beginning of the experiment were used. Animals were randomly assigned to five treatments (four replicates/treatment) in a completely randomized design to evaluate the effect of replacing corn grain with a wet byproduct of cassava starch extraction on apparent digestibility of nutrients. Bulls were fed diets containing sorghum silage and one of the following levels of cassava […]

The objective of this work was to evaluate the effects of combined rates of N and S on signalgrass (Brachiaria decumbens) productive characteristics. This grass was collected in cylinders with soil + plants in a degrading pasture established in an Entisol. The experiment was carried out in a greenhouse, at Piracicaba, SP, Brazil, from November 2003 to March 2004. Five rates of N (0, 100, 200, 300 and 400 mg/dm3) were combined with five rates of S (0, 10, 20, […]

Two experiments (EXP) were carried out with 49 and 65 kg barrows (EXP 1 and 2, respectively) to determine digestible energy (DE) values of three sources of blood meals (EXP 1): conventional (CBM), flash dried (FDBM) and spray dried red blood cells (SDRBC), and of three poultry by-product meals (EXP 2) (PBM-10.1, PBM-12.7, and PBM-16.7% of ash content) by an alternative method to the replacement method (SbM). The method was based on the starch basal diet replacement with increasing levels […]

The objectives of this trial were to evaluate carcass characteristics and production costs of ½ Dorset Santa Inês lambs finished at two finishing systems. Forty-four weaned ½ Dorset Santa Inês lambs were distributed to one of the following two finishing systems: 1) feedlot lambs were fed concentrate (4% BW) containing 15.56% CP and 4.32 Mcal GE/kg DM or 2) lambs were on pasture and received a supplement (1.5% BW) containing 27.01% CP and 4.51 Mcal GE/kg DM. Concentrate and supplement […]