The objective of this experiment was to evaluate the effects of different dietetic physical profile on the performance of lactating dairy cows. Ten Holstein dairy cows (avg. 550 kg) were allotted to a switch back experimental design in three successive periods. The animals were individually housed in a tie stall and fed with total mixed rations constituted by Tifton hay (50,4%) and concentrated (49,6%). The Tifton hay was ground in commercial miller and sieved at 3,2; 4,8; 7,9; 15,9 and […]

This work was conducted with the objective to study the quantitative and qualitative traits of carcass and meat of two Hereford categories, two years old steers and cull cows with average age of eight years. Twelve animals of each categorie were randomly taken from the same herd, and feedlot finished during a 112 days period, being the roughage (sugar cane) : concentrate ratio of 69 : 31 during the first phase of 56 days and 57 : 43 during the […]

The performance, during the summer of beef steers grazing elephantgrass (Pennisetum purpureum Schum.), alexandergrass (Brachiaria plantaginea (Link) Hitchc), sorghum (Sorghum bicolor (L.) Moench) and millet (Pennisetum americanum (L.) Leeke) was evaluated. The grazing period for the elephantgrass occurred from 12/04/93 until 04/26/94, and for the other grasses occurred from 01/04/94 until 04/12/94. The total period of grazing was of 143 days for the elephantgrass and of 98 days for the other pastures. The continuous grazing system with variable stocking rate […]

The experiment was conducted with the objective to evaluate the parameters of dry matter intake, weight gain, feed conversion and energy efficiency of young feedlot steers, fed with two diets that included the AG-2006 sorghum silage harvested with different cutting heights: low cut (14 cm) and high cut (45 cm). Twelve Braford calves with an average age of seven months and average live weight of 208 kg, were used. The feedlot period was 126 days, divided in two period of […]

This study offers information on the morphology (in live and in carcass), commercial characteristics, components of the liveweight, quality of the carcass and meat in no castrated lambs derived from the crossing between Border Leicester rams and Corriedale and Polwarth ewes, grazing on native pasture in Rio Grande do Sul, Brazil. Twenty-four lambs slaughtered at 6.5 months of age were used, from which 11 were from Border Leicester rams x Corriedale ewes and 13 were from Border Leicester rams x […]

Twenty-one lambs were used, nine of the Bergamácia and 12 Santa Inês breed, were confined individually for 75 days, and fed diets containing 24% of swine wastes, in the form of biju (obtained by the scratching and sweeping of the floor of the growth and termination stalls) or DSW – dry sifted wastes (constituted by the solid part of the material contained of the water of wash of the stalls, obtained through sieves of fine mesh). There was no diet […]

Twenty-one lambs of the Santa Ines and Bergamacia breeds were confined by a period of 75 days and fed diets containing 24% of swine wastes, in biju form (obtained by the scratching and sweeping of the floor of the growth stalls and termination) or dry sifted wastes – DSW (obtained through the sifting of the solid part of the material contained in the sheet of water and in the water of the wash of the stalls). The animals were slaughtered […]

Similar to other living animals, the cells of the birds also synthesize small proteins (heat shock protein, Hsp), which increasing levels can be induce by stress. The Hsp have a relevant function in maintaining the integrity of the cell, and we question if they are involved in the mechanism of the cellular protection of target organs affected by ascites syndrome (AS). The objective of this study was to evaluate the body temperature, and the Hsp70 levels in the heart and […]

The research was carried out to evaluate the ileal (ILEALDC) and total (TOTALDC) digestibility of the starch and the activity of the enzymes amylase (ACAMY) and maltase (ACMAL) in rabbits of 35 and 45 days old, fed with starch from the corn or cassava. In each assay 20 New Zealand White rabbits were used, being ten males and ten females, housed individually in wire cages and distributed in an entirely random arrange. At the end of the experimental period, the […]

One experiment was carried out using 120 laying Isa Brown chickens fed diets containing sugar-cane yeast, to determinate the methionine+cystine (met+cys) requirements. The birds were 51 weeks old at the beginning of the experiment, with the duration of 84 days, with three periods of 28 days each. A completely randomized block design with five treatments and four replications was used. The treatments consisted of a basal diet supplemented with five levels of DL-methionine in order to obtain diets with 0.45, […]