In order to study the influence of the economic factor on the objectives used to select the animals, production data of a payment program by milk quality implanted by a milk industry of Rio Grande do Sul were used. The criteria of quality of the referred program consisted of minimum contents of 3.1% of fat, 2.85% of protein and a maximum 500,000 units of somatic cells. The data were stratified in three levels, in agreement with the volume of milk […]

Fifteen crossbred cows (Holstein-Zebu) from EPAMIG-Leopoldina Experimental Farm with an average weight of 511.8 kg were allocated into an experiment in a complete randommized design, in four treatments, with four animals in the treatments 1, 2, and 4 and three in the treatment 3. The treatments were cosntituted of diets with corn silage and concentrate (60:40) and were fed individually and ad libitum and their contents in percentage of urea were: T1=0.0; T2= 0.7; T3= 1.4 and T4=2.1 corresponding to […]

To estimate nutrient and energy digestion with animal from in vitro variables it is necessary to control factors that may interfere on digestion such as: source and concentration of digestor substance, as well as the origin and processing of test ingredients. In this study there were performed five laboratory assays, two with poultry and finally regression equations were established based on variables generated with twelve vegetable ingredients. The results showed that there is greater solubility of proteins with NaOH than […]

One experiment was conducted to study the effect of the substitution of dry skim milk for isolated soybean protein in diets of piglets from 21 to 35 days of age. It was used 80 piglets in a experimental design involved 5 treatments, 4 blocks of 4 animals each in a total of 16 piglets per treatment. The treatments constituted the levels of substitution (0%, 25%, 50%, 75% and 100%) of the protein furnished by dry skim milk for isolated soybean […]

The experiment was conducted to evaluate protein sources and levels in the initial diets, for piglets weaned at 21 days of age. The animals were allotted in a completely randomized design in a factorial 2 x 2 x 2, with type of diets ( dried whey and fish meal + lactose), levels of crude protein (20 and 24%) and piglet weight at weaning (<6,0 and > 6,0kg), in a total of 8 treatments and four replications each. In the experimental […]

An experiment was conducted to evaluate the effect of dietary energy level on performance, carcass yield and abdominal fat of broiler chickens. Two thousand and four hundred day-old Ross 308 chicks were raised until 42 days of age in floor pens. The experimental design was a completly randomized in a 6 x 2 factorial design (energy x sex). The treatment was consisted of combinated levels of energy: 2900, 2960, 3020, 3080, 3140 and 3200 kcal/kg ME and sex, with four […]

The feedlot performance of Aberdeen Angus (AA) and Hereford (HE) steers submitted to two energy levels, in a 2 x 2 factorial scheme, being the lower level of 3.07 (12% of concentrate in the diet) and the higher of 3.18 Mcal of digestible energy/kg of DM (32% of concentrate in the diet), was evaluated. Eight steers of each breed were used, with nine months of age and average initial weight of 220.31 kg. The animals were confined until the estimated […]

This experiment was carried out to evaluate the effect of sex and parturition type (simple or double) on live weight, body length, thoracic diameter at birth and at weaning of agouti, as well as total weight gain and daily mean weight gain, to obtain subsidies that contribute to preservation and rational exploration of these animals. Fourty-one animals (26 males and 15 females) were allotted to a completely randomized a design. Animal weight, thoracic diameter and body length of agouti at […]

The present study had the objective of identifying different management systems related to newborn dairy calves morbidity and mortality, with emphasis on colostrum feeding. It was used 211 herds in the South Center Region of Minas Gerais State, separated into three production categories: category A, from 200 to 600 L/day; category B, from 601 to 1000L/day; and category C, >1001 L/day. The dairy farmers were interviewed through a questionnaire that embraced the production aspects, herd management and newborn performance, focusing […]

Ninety-six young beef males were allotted to a completely randomized design in a 4×3 factorial scheme, four genetic groups, Nellore (N), ½ Simmental ½ Nellore (SN), ½ Red Angus ½ Nellore (AN) and ½ Red Angus ¼ Simmental ¼ Nellore (ASN), and three sex conditions (SC), intact (I), castrated (C) and castrated plus Synovex S ® implant (CS). Males were castrated at six months of age, and feedlot started two months later, with the animals being fed with a 70% […]