A trial was carried out to determine lysine requirements for castrated males during finishing phase of two genetic swine groups, based on the ideal protein concept. Sixteen animals from genetic common group (GCG) were used and another sixteen, from the genetic improved group (GIG) were allotted to four treatments. The treatment consisted on a basal diets, based on corn and soybean meal containing 0.60% of lysine and other three diet, adding increasing lysine levels to achieve 0.75, 0.90 and 1.05% […]

Seventy two piglets weaned at 21 days of age with live weight of 5.01 ± 0.90 kg were allotted to a randomized block design, replicated six times with four animals per experimental unit. The treatments were constituted of diets with the following protein sources: soybean meal, macerated full fat soybean and micronized soybean. The diets were fed from weaning to 42 days (initial-1 phase) and from 43 to 56 days of age (initial-2 phase). The residual effects of the treatments […]

Thirty pregnant Canchim cows were maintained in a rotational grazing system of Marandu grass and received supplemental feed to body weight maintenance during the dry season. With the aim to evaluate the Agricultural and Food Research Council recommendations about supplying dietary substrate to ruminal microbial growth, the animals were allotted to a completely randomized design (3 treatments x 10 replications), according to the following treatments: control (without restriction of microbial requirements of degradable protein and fermentable energy); restriction of microbial […]

The carcass quantitative characteristics of feedlot finished Red Angus steers, with initial age of eight months and 189 kg, slaughtered with 340, 370, 400 or 430 kg (SW), were evaluated. The number of days to reach the respective weight was 114, 144, 173 and 213 days. The diet contained 13.13% crude protein, 2.7 Mcal digestible energy/kg DM and a roughage:concentrate ratio of 56:44. Carcass dressing percentage and conformation were not affected by the slaughter weight. The saw cut weight although […]

The feedlot performance of Red Angus steers, with initial age of eight months and 189 kg of initial live weight, fed to reach the slaughter weight (SW) of 340, 370, 400 or 430 kg, was evaluated. The number of days to reach the respective weight was 114, 144, 168 and 209 days, with 12, 13, 14 and 15 months of age. The animals were fed with a 13.13% crude protein diet, and roughage:concentrate ratio of 56:44. The average daily gain […]

The objective of this study was to evaluate the performance of growing steers, during the dry season, fed supplements with different protein sources. The treatments were constituted of: mineral mixture (control) (MM), and supplements including the protein sources soybean meal (SBM), cottonseed meal (CM), corn gluten meal, (CGM) and wheat bran (WB). The supplements were supplied ad libitum, by using urea end sodium chloride as intake controller, adjusted at the level that allow to intake 1 kg supplement/day. The average […]

In order to evaluate the in situ degradability of the dry matter and crude protein of silages of six sorghum genotipes in different stages of maturation, four fistulated crossbred holstein-zebu steers, fed with grass hay ad libitum, were utilized. The silage samples were dried and milled at 5 mm screen and 5 g of each sample were placed in 12 x 18 cm naylon bags and 50 µm porous size, and were introduced through the fistulas. After different times of […]

Thirty ¾ Canchim + ¼ Nelore young bulls with 417 kg of body weight and 15 months of age, were confined during 84 days. The animals were fed with diets composed with corn silage, corn grain, cottonseed meal, soybean meal, whole soybean and mineral mix, adjusted in agreement with the recommendations of the Metabolizable Protein System (MP), Cornell Net Carbohydrate and Protein System (CNCPS) and Intestine Digestible Protein System (PDI), for predicted body weight gain of 1.3 kg/head/day. The daily […]

Thirty two Canchim suckling calves, maintained on rotational grazing system of Brachiaria brizantha cv. Marandu, were divided in three groups corresponding to three evaluated treatments: control (without creep-feeding); SAL5 (addition of 5% of NaCl to concentrate fed in creep-feeding); and SAL10 (addition of 10% of NaCl to concentrate fed in creep-feeding). Feeding in a creep-feeding system lasted 90 days, divided in three subperiods of 30 days. The body weight gain was greater in the subperiods 1 and 2 for SAL10 […]

The objective of this experiment was to study different levels of energy supplementation on the carcass and meat qualitative characteristics of beef cull cows of different ages, under temporary grazing on cultivated pasture of ryegrass (Lolium multiflorum) plus triticale (X triticosecale). Fourty Charolais cows were divided into four age classes: four, five or six, seven or eight and nine or more years, and randomly alloted to four levels of supplementation (SL): 0, .3, .6 and .9% of live weight. The […]