The objectives of the present work were to determine nitrogen compounds flow into the abomasum, total carbohydrate and organic matter ruminal degradation, microbial efficiency, N-NH3 concentration and ruminal pH in cattle fed with diets based on corn silage, elephant grass silage and Tifton-85 bermudagrass hay. Six ruminal and abomasal fistulated cattle were utilized in a double 3 × 3 latin square. Abomasal digesta dry matter of and microbial dry matter flows were determined by use of indigestible neutral detergent fiber […]

The body composition and protein and energy requirements for growth of steers of four genetic groups finished in feedlot were evaluated in this experiment. comparative slaughter method was used in a completely randomly experimental design, with four treatments: Nellore (NE), ½ Aberdeen Angus + ½ Nellore (AN), ½ Canchim + ½ Nellore (CN) e ½ Simmental + ½ Nellore (SN). Forty-seven steers averaging 310 kg initial shrunk body weight (SBW) and 22 months were fed during 101 days in a […]

The objective of this work was to evaluate the effect of the levels concentrate of the diet on meat quality of no castrated male kid Saanen goats. Fifteen male goat with initial 16 ± 0.3 kg BW and four months old were fed diets formulated with 80, 65 e 50 of concentrate up to the animals reached a final a 22 kg BW. The rations were formulated to promote a weight gain of 150g/anim.day. Centesimal composition, colour, texture, lipid and […]

The objective of this trial was to study the effects of substituting corn silage by cassava foliage silage in the diets of non lactating, pregnant dairy cows. The levels of substitution of corn silage by cassava foliage silage were 0, 20, 40 and 60%. Intake and apparent digestibilities of dry matter, organic matter, crude protein, neutral detergent fiber, total carbohydrates, no fiber carbohydrates were evaluated, and pH and ruminal ammonia nitrogen before and 2, 4, 6 and 8h after the […]

Twelve Nellore of three sexual categories (four heifers, four bulls and four steers) averaging 15 months of age and body weight of 235, 249, and 239 kg, respectively, were assigned to a completely randomized design with a 2 × 3 factorial arrangement (two levels of concentrate – 25 or 50% and three sexual categories) to evaluate intake, partial and total digestibility of nutrients, microbial protein synthesis and ruminal metabolism. The collection of ruminal fluid was done before and at 2, […]