This work aimed to evaluate the effect of neutral detergent fiber levels from forage (NDFf) in diets for lactating goats. Five goats were distributed in a 5 × 5 Latin square design, using five NDFf levels (19, 27, 35, 42 and 48%) as independent variable. Intakes of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), nonfibrous carbohydrates (NFC), total digestible nutrients (TDN) and net energy (NE) linearly decreased as NDFf levels increased. NDF intake was not […]

Two Nellore herds were compared, one selected for greater postweaning weight and the other, control, selected for average postweaning weight, to evaluate the effects of 29 years of selection on feed efficiency. Sixty Nellore males (41 selected and 19 control) averaging 205 kg and 267 days of age were evaluated in individual pens during performance test. Performance and dry matter intake were used to determine the following feed efficiency traits: feed conversion; residual feed intake; residual gain; partial growth efficiency; […]

It was evaluated in this study the effect of the type of the diet on duodenal flow of long-chain fatty acids in steers. The tested diets were the following: conventional (feedlot diet composed of 60% corn silage and 40% of concentrate); winter forage silage – rye grass (Lolium multiflorum, Lam); or tropical forage silage – association of millet (Pennisetum americanum, Leeke + alexander grass, Brachiaria plantaginea). Six Charolais × Nellore crossbred steers with cannulas in duodenum were used in a […]

This study evaluated the response of dairy heifers fed corn based silage with 1.3 kg/day of concentrated in comparison with three sugar cane-based diets corrected with 1% of urea + ammonium sulphate (9:1) (urea), with 1.3; 2.0 and 2.7 kg/day of concentrate. A total of 20 heifers were used (12 Holstein breed and 8 Brown Swiss breed heifers) in a randomised block design, with 5 blocks formed on the basis of initial live weight and breed. The consumption of dry […]

Eight Holstein cows with body weight 570 ± 43 kg and 60 ± 20 lactation days were distributed in a double Latin square design with four 21-day periods to determine the effects of feeding ground or whole flaxseed with or without monensin supplementation (0.02% on a dry matter basis) on fatty acid profile of butter stored for 15 and 45 days. Ground flaxseed supply, in comparison to whole flaxseed, reduced relative percentages of 16:0, cis7-16:1, 17:0, and cis10-17:1 but it […]

In order to study the effect of pH on defaunation in the rumen, four rumen fistulated steers were fed a basal roughage diet for a 4-week adaptation period followed by 17 weeks of feeding with three diets and two feeding levels of high concentrate diet. Rumen outflow fluid rate was evaluated in both ration levels. Rumen protozoa population was monitored weekly and when animals became defaunated, protozoa were reinoculated with rumen contents from one of the faunated steers. At every […]

Forty Holstein cows, with previous reproductive problems, empty, at second or more lactations, with an average milk production of 9,200 kg in the previous lactation and a dry period over than 50 days were distruibuted in two groups to evaluate two protocols of milking induction. It was given to group 1, on days one, eight and 21 recombinant bovine somatotropin-bSTr (500 mg); from day two to eight, estradiol cypionate (0.075 mg/kg BW) and medroxi progesterone acetate (0.25 mg/kg BW); from […]

The objective of the present study was to evaluate the nutritional value of elephant-grass silages containing annato byproduct. Twenty intact rams were distributed in a complete randomized block design with five diets (0; 4; 8; 12 and 16% annato byproduct in the silage) and four replications and used to estimate the intake, apparent nutrient digestibility, content of total digestible nutrients and nitrogen balance. The addition of annato byproduct raised the intakes of dry matter (DM), organic matter (OM), crude protein […]

It was used 80 Santa Inês ewes with average body weight 47.79 ± 3.76 kg, mated with Dorper rams and fed concentrated diet with 15.20; 22.48; 26.52 and 35.65% crude protein (CP) on the initial third of pregnancy. Sheep were kept on aruana grass (Panicum maximum cv. Aruana) pasture during the day. At birth, biopsy on the left Semitendinosus muscle were done on male lambs to evaluate the number and diameter of muscular fibers. During finishing phase, lambs were distributed […]

The objective of this work was to evaluate the effect of sugar cane hydrolysis with calcium oxide (CaO) on nitrogen balance, concetrations of urea in the urine and in the plasma and synthesis in microbial protein in goats. Eight castrated male Saanen breed goats, with 22.6 kg average body weight and at four months of age were used distributed in two 4 õ 4 Latin squares, during four 14-day experimental periods. The rations which were formulated to be isoprotein, with […]