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 […]

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 […]

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 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 […]

The ammonia is a highly irritant gas which cause stress to the birds, leading to weight losses, or even their death. For that reason, there is a great interest on determining the amount of ammonia liberated from the litter, as well as the factors which influence the production of this substance, but most methods require expensive equipment or are relative complex. Therefore, the present work was idealized with the aim of develop and standardize a simple and unexpensive methodology, usefull […]

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 the perfomance, carcass traits and economic results from crossbred lambs, finished in feedlot. Fourty ½ Ile de France x ½ Corriedale 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 four male groups (G1M, G2M, G3M […]

The experiment was conducted to evaluate the performance of beef heifers with average age of ten months and average initial weight of 200 kg, grazing cultivated annual temperate grasses mixtures supplemented with salt plus lasalocid or salt. Spread sowing ocurred on 04/21/95, being the area fertilized with 200 kg/ha of 05-30-15. Nitrogen fertilization in the form of urea (175 kg/ha of N) was subdivided in four applications. The establishment of the pasture occured from 04/21 to 06/08 and the experimental […]

The present experiment was conducted to evaluate the effect of protein or energy restriction from 8th to 14th days of age, on growth and carcass composition of broiler chickens raised at different environmental temperatures. It was used 900 day-old, male chickens from Ross strain, reared in three environmentally controlled rooms where ambient temperature were maintained at 18, 25 and 33°C up to 42 days of age. For each temperature, a split-plot design was used with feed program as the main […]

Using a linear statistical model (GLM/SAS) the reproductive performance and growth of 480 Nellore heifers were evaluated from the age of 7.5 to 17/18 months under four feeding systems during the dry period (96/05 to 96/10): Brachiaria brizantha cv. Marandu pasture (B); Brachiaria brizantha cv. Marandu pasture + Anipro (BA); Pennisetum americanum cv. (L.) Leeke (Pearlmillet) (M) and Brachiaria brizantha cv. Marandu pasture + Sal Ouro (BS). At the end of supplementation all heifers were moved to a paddock of […]

The objective of this trial was to evaluate the performance of veal calves fed whole milk or milk replacers. Thirty Holstein calves from birth up to 160-170kg of body weight were randomly allotted to the following experimental treatments: I-whole milk; II- whole milk up to 100kg of body weight, and from this weight on, the supply of more liquid diet was from a commercial finishing milk replacer, added to the milk, up to slaughter; III-whole milk up to the 10th […]