An experiment was conducted to evaluate the effects of different combination of levels of ammonia (0.0, 2.2, 3.2, 4.2% by weight of dry matter) and sodium sulphide (0.0, 2.1, 3.1, 4.1%) on chemical-bromatologic composition and “in vitro” dry matter digestibility (IVDMD) of coffee peel with 30% of moisture. The crude protein (CP) content increased due to the crescent levels of anhydrous ammonia. The nitrogen retention (NR) decreased as the ammonia and sulphide levels increased. The contents of insoluble nitrogen in […]

Milk yield adjusted for 305 days and for age of Holtein cows were used to verify the effectiveness of including sire-by-herd interaction in the model of analysis as an adjustment factor for heterogeneous variances between herds. The herds were classified in three classes of phenotypic standard deviation: high, medium and low. Variance component estimates were obtained by Restricted Maximum Likelihood methodology, for classes of phenotypic standard deviation, considering each one as a different trait, using a multiple trait analysis. Two […]

Yield records of Holstein cows were used to verify the interaction effect on accuracy of sire breeding values. The records of milk yield were adjusted to 305 days of lactation and age of the cow. Variance components for milk yield were estimated using restricted maximum likelihood methodology through two animal models, either not fitting or fitting a sire-by-herd interaction term. Likelihood ratio test was used to verify the effectiveness of including a sire-by-herd interaction effect in the model. Average milk […]

Forty-eight female pigs were used to determine tissue growth curves after slaughter of the animals at 50, 60, 70, 80, 90, 100, 110 and 120 kg and dissection of the carcasses. The lean cuts in carcass were made according to that used by Brazilian pork slaughters. In each cut it were separated muscle, fat, bone and skin amounts. The expanded allometric function was used to estimate and to fit the growth curves. The muscle amounts in carcass increased to 41.9% […]

This trial was conducted at National Beef Cattle Research Center of Brazilian Agricultural Research Corporation (Embrapa Beef Cattle). Forty five F1 Aberdeen Angus-Nellore steers were used to evaluate the effects of different dry seasons feeding schemes on carcass characteristics. The treatments were: control, without supplementation (S/S); supplementation in 2nd dry period (S2S); supplementation in 1st dry period (S1S); supplementation in 1st and 2nd dry periods (S12S) and supplementation in 1st dry period and confinament in 2nd one (S1C2). Animals were […]

The objective of this study was to evaluate the effect of increased environmental temperature on physiological traits of Morada Nova (MN) and Santa Ines (SI) sheep breeds in the Federal District, Brazil. Two groups (25 MN and 25 SI) were selected for study and included both pregnant (EP) and non-pregnant (EPN) ewes, aged betwen 2 and 4 years. The fifty ewes were recorded, once a month, for six months, at 8 am and 2 pm, and measurements included body weight […]

The main objective of this work was to evaluate the Nellore breed in Brazil with respect to the phenotypic and genetic variation of the mature size of cows. The observations were taken from 34 herds of eleven different beef cattle production regions in the country. There were considered cows of the horned and polled varieties, raised on pastures, from herds that had at least 50 cows. With these restrictions it was formed a general file with 6,867 cows with valid […]

The body composition, in terms of percentages of muscle, fat and bone of carcass or empty body weight (EBW), was estimated in a sample comprised of 44 bulls, born in 1995, from the selected herds for weight at 378 days (W378) at Sertãozinho Experiment Station (SP-Brazil) and finished in a feedlot until slaughter. The sample of each herd, representing it’s mean for W378, was 9 for each group, Gir (Gi); Nellore (NeS); Control Nellore (NeC), Caracu (Ca) and 8 for […]

Eight hundred Avian Farms chicks (50% males; 50% females) from 1 to 21 days of age, averaging 40.5 g, fed a basal diet (3.000 kcal ME/kg and 21.1% CP) deficient in sodium (0.017%) and supplemented with NaCl, corresponding to the levels of 0.077, 0.137, 0.197, 0.257 and 0.317% total sodium, were used to determine the sodium requirement. A completely randomized design, in a 5×2 (sodium levels x sex) factorial design, with four replicates and 20 chicks per experimental unit, were used. […]

This work was conducted aiming to evaluate the effect of the addition nicarbazin and lysine levels in the diet of broilers from 1 to 21 days of age and its residual effect on the period from 22 to 49 days of age. The broilers were created in high environmental temperature. Four hundred and eighty male broilers Ross brand were used, in a completely randomized experimental design, in a 2×4 factorial arrangement (addition or not of nicarbazin and level of lysine), […]