A trial was carried out to verify the effects of the addition of fumaric acid, oligosaccharide mannose (BIO-MOS®), acidifiers (ACID-ALL® ) and oligosaccharide + acidifiers in diets growing rabbits on performance. One hundred NZW rabbits, 50 males and 50 females from 39 to 75 days old, distributed in a randomized experimental design with five treatments, 10 replications and two animals by experimental unit. In the period from 39-50 and 39-75 days of experiment none of these performance characteristics was affected […]

A simulation model was used to evaluate productivity and efficiency of beef cow-calf systems in Rio Grande do Sul State with different heifers first calving age (CA, years) and calving rates (CR): “Traditional System” (TS) CA=4; “Improved System (IS)” CA=3; “One Year System (OYS)” CA=2. In each system it was studied the effect of CR varying from 50 to 90%. A statistic deterministic model was used. The effect of reducing CA on productivity and efficiency was dependent of CR. IS […]

Thirty Canchim cows, averaged 471 kg of body weight and 50 months old, were fed with supplement during the dry season of 1998, in order to evaluate the precision of the predicted performance for different systems of diet evaluation. The supplements were composed of corn silage, corn grain, citrus pulp, cottonseed meal, soybean meal and whole soybean, in agreement with the recommendations of the Metabolizable Protein System (MP); Cornell Net Carbohydrate and Protein System (CNCPS); and Intestine Digestible Protein System […]

The performance of 32 growing Holstein heifers, with average weight of 84 kg and supplemented with monensin, during four months, was studied. The animals supplemented with monensin presented higher weight and hearth girth at 90 and 120 days of experiment, higher weight gain, with value of 26.56% superior than the control animals. No difference was observed for the corporal length, plasma glucose and the height values. The animals fed monensin presented higher height values. The animals supplemented with monensin showed […]

This experiment was carried out to evaluate the effects of sex (males x females) and four slaughter weights (28, 32, 36 and 40 kg), on carcass morphometry, cuts weights, tissues and offals percentages, from crossbred lambs Ile de France x Corriedale, finished in feedlot. Fourty lambs (20 males and 20 females), were weaned at 60 days of age and were full fed a diet with 16.46% CP and 67.63% TDN. They were divided in 4 male groups (G1M, G2M, G3M […]

The objective of this study was to evaluate the use of corn grains in different forms (corn dry grain, high moisture corn silage, moisturized corn silage) in the diet of confined lambs, and its possible effects on the qualitative and quantitative characteristics of the carcass. Twenty male Bergamacia x Corriedade lambs were used. The animals were confined and fed ad libitum, assigned to five treatments consisted of dry corn: high moisture corn silage or moisturized corn silage (0:100, 50:50, 100:0). […]

The in vitro fermentation of the following food sources were evaluated: corn meal (CM), soybean meal (SM), wheat meaddlings (WM), sorghum (SO), corn gluten feed (CG) and urea (UR), incubated alone or with monensin, pure for analysis or comercial (Rumensin®). The experiment constituted of 18 experimental units (three energetic or proteic food sources ´ three antibiotic (control, monensin or rumensin) ´ two duplicates), and the following fermentation parameters were analyzed: pH, ammonia production, microbial protein, soluble protein and protein degradability. The incubations […]

It was evaluated the caffeine contents of caffeine, tannins, lignin and silica in the hull and pulp of coffee of cultivars Catuaí, Rubi, Mundo Novo. Pulp was obtained by moist pulping in a mechanical pulper and dried in the sun adjusted to 13% moisture. Materials were stored in raffia bag in environment free of moisture and ventilated with samplings every 90 days. The quadratic effect shown increased caffeine content along 360 day storage, this increase was of 11,7% along 12 […]

Dry matter intake (DMI) of coastcross bermudagrass grazing by crossbred Holstein-Zebu and Zebu lactating cows was calculated using in vitro dry matter digestibility from extrusa (four esophageal fistulated cows) and fecal output estimate with mordent chromium by the non linear model. Pasture was managed in a rotational system with three days of occupation and 27 days of resting period, adopting a stocking rate of 1.6 and 3.2 cows/ha respectively during the dry and rainy season. Four different equations based on […]

The effects of supplementation of crossbred steers on pasture during the wet season on dry matter (DMI), forage (FI), neutral detergent fiber (NDFI) and crude protein (CPI) intakes; digestibility of DM (DMD), NDF (NDFD) and CP (CPD); rate of passage of ruminal particles (RPR) and total mean retention time (TMRT) of the digesta; pH and concentrations of amoniacal-N in the rumen, were evaluated. Five F1 Limousin x Nelore steers fistulated in the rumen and esophagus and supplemented on Brachiaria decumbens […]