The objective of this experiment was to evaluate the fermentative and chemical parameters of four different bulk densities of marandugrass (Brachiaria brizantha) silages. The forage was harvested with 60 days of vegetative growth and 32% of DM. The bulk densities used were 100, 120, 140 and 160 kg DM/m3. Treatments were distributed in a completely randomized design with four replicates. Gas production data were analyzed by repeated measures model. The lower density silages showed greater gas production. Low effluent production […]

Semen samples of five specimens of Prochilodus lineatus (Valencienes, 1847) were used to test the toxic and cryoprotectants effects of six solutions based on BTS (Beltsville Thawing Solution®) 4.5%: A – BTS 4.5% + Methanol 10%; B – BTS 4.5% + DMSO 10%; C – BTS 4.5% + KCl 0.072% + Methanol 10%; D – BTS 4.5% + KCl 0.072% + DMSO 10%; E – BTS 4.5% + KI 0.036% + Methanol 10% and F – BTS 4.5% + KI […]

This study was carried out to evaluate the performance of Nile tilapia, cultured in net pens, and fed diets containing 27.0 (control), 25.2, 24.3, and 22.7% of digestible protein. Crystalline amino acids (L-lysine, DL-methionine and L-threonine) were added to keep amino acid levels according to the ideal protein profile and to simulate amino acid levels of the control diet. Fish (34.63±1.19 g) were hand-fed one of the four isoenergetic (3,075 kcal of digestible energy/kg, as fed basis) experimental diets until […]

The objective of this study was to identify and quantify benchmarks of milk production systems in the region of Extremo Sul da Bahia. Technological profile and indicators of size, livestock productivity and economy of nine farms were analyzed. It were also determined the correlation coefficients between these indicators and the rate of retun. Indicators with significant correlation were regressed on rate of return in order to quantify the benchmarks with the following rates of return: 4, 6, 8 and 10% […]

The objective of this trial was to evaluate the apparent total tract digestibility of nutrients on sheep fed diets containing ammoniated elephantgrass silage plus cocoa meal or palm kernel cake, which partially replaced corn and soybean meal in the concentrate. Eighteen non-castrated Santa Inês sheep averaging 22.6 kg of body weight were assigned to a completely randomized design with a 2 x 3 factorial arrangement of treatments. The experiment lasted 77 days with 14 days for diet adaptation and three […]

Four Corriedale wethers averaging 45 kg of body weight were randomly assigned to a 4 x 4 Latin square to evaluate the effects of two carbohydrate sources (soybean hulls and corn grain) and two dietary forage levels (40 and 70%) on nutrient digestibility, N balance, and portal nutrient flux. Animals were fitted with catheters in the mesenteric and portal veins and in the mesenteric artery. Digestibility of nutrients and N balance were determined by total collection of feces and urine. […]

The objective of this trial was to develop simple regression equations for estimating the chemical body composition of Nellore steers by using the chemical composition of the 9-10-11th ribs cut. Twenty-seven feedlot Nellore steers varying from 338.0 to 503.6 kg of BW and from 21 to 31 months of age were used. Six reference animals were slaughtered at the beginning of the trial to estimate the initial chemical body composition. Contents of water, protein, EE, and ash of the 9-10-11th […]

The objective of this trial was to use n-alkanes to estimate dry matter intake (DMI) and DM digestibility in sheep. It was also of particular interest to compare two methodologies of fecal collection (total collection vs. grab samples) as well as to identify which n-alkanes best estimate DMI and DM digestibility. Twenty animals were assigned to a completely randomized design and were fed diets containing different proportions of forage peanut (Arachis pintoi Koprov & Gregory cv. Amarillo) and signalgrass hays […]

The objective of this trial was to compare the effect of different feeding strategies with or without ionophore (monensin) supplementation on performance of dairy heifers. Twenty Brown-Swiss heifers averaging 200 kg of body weight and five months of age were used in a completely randomized design with a 2 x 2 factorial arrangement of treatments. Treatments were: two feeding regimes (conventional vs. compensatory growth) with (200 mg/animal/day) or without monensin supplementation. Animals in the conventional feeding regime were fed ad […]

The objective of this study was to evaluate the effects of increasing levels of rumen-degradable protein (RDP = 47, 52, 57 and 62%) associated to starch sources of low (corn) and high (cassava by-product (CBP) ruminal degradability on in vitro DM digestibility (IVDMD) and average daily gain of growing steers. In vitro DM digestibility was determined by using the Tilley and Terry (1963) technique. The in vitro data was submitted to analysis of variance and regression analysis in function of […]