Large White data set with performance and reproductive traits for a development line were analyzed in order to verify the importance of including maternal and common litter effects in genetic evaluation models, using four different models: model 1 – direct genetic effect; model 2 – the direct and maternal genetic effects; model 3 – the direct and common litter effects; and the model 4 – the direct, maternal and common litter effects. The traits were analyzed by Restricted Maximum Likelihood […]

The objective of the experiment was to determine the chemical composition, crude energy, apparent metabolizable energy (AME) and corrected metabolizable energy (AMEn) from samples of corn submitted to different drying temperatures (environmental temperature and artificial drying with temperatures of 80, 100 and 120ºC) and different storage periods (0, 60, 120 and 180 days). The total excreta collection method was used to determine the values of AME and AMEn, for Avian Farm birds, males, reared from 21 to 30 days of […]

Fifty crossbreed gilts (1/2 Landrace, 1/4 Large White e 1/4 Pietran) with average weight of 154.5 + 2.93 and 175.1 + 8.53 kg at second and third reproductive cycle respectively, were used to evaluate different crude protein (CP) levels in gestation diet. A randomized block design, with five treatments, ten replicates and one animal by experimental unit was used. The treatments corresponded to rations with 10.0, 11.5, 13.0, 14.5, and 16.0% of crude protein. Sow weight gain, piglet average weight […]

One bioassay was carried out using 21-to32-day old broilers chicks to determine the values of apparent metabolizable energy (AME) and nitrogen-corrected apparent metabolizable energy (AMEn) of crude soybean oil, corn oil, canola oil, avian fat, coconut fat, swine lard, beef tallow, crude soybean oil + coconut fat and crude soybean oil + beef tallow, both latter in 1:1 proportion. The method of total excreta collection was used for the trials, which lasted 10 days each: the first five days for […]

This study was conducted to evaluate the effect of the temperature and rearing system on the apparent metabolizable energy requirements for maintenance (MEm) for broiler breeder hens. In the experiment 1, MEm was determined with birds in cages. One hundred-ninety-two birds were housed in climatic chambers at 13, 21 and 30ºC. The birds were assigned to four treatments with four replications of four birds each. The treatments were: ad libitum intake, 70, 50 and 30% of ad libitum intake. Comparative […]

One experiment was conducted to evaluate the effects of sodium levels on performance of laying hens in second phase of egg production. Two hundred and sixteen laying hens (Hy-line W-36), after forced molt at 60 weeks of age, were used. The experimental design was a factorial with three sodium levels (.15, .25, and .35%) during 30 days after fasting period and the same levels on the production period. Four periods of 28 days each were evaluated concerning the following parameters: […]

Two experiments were carried out to determine the nutritional requirement of calcium for broilers in growing (22 to 42 days), and finishing (43 to 53 days) phases. Three hundred and sixty Avian Farm broiler chicks (180 from each sex) were used in both trails. The first experiment lasted 21 days and the second one, 10 days. A completely randomized design was used in both experiments, with six treatments, six replications and 10 birds per experimental unity (five males and five […]

Twenty-four Holstein x Zebu crossbred calves were used to compare the following experimental treatments: 1) calves management every day of the week, 2) absence of calves management on Sundays, with the compensation of the amount of milk fed (6 kg of whole milk given on Saturdays and on Mondays), and 3) absence of calves management on Sundays without the compensation of the amount of milk fed. Calves were fed 4 kg of whole milk/animal/day (except for treatment 2) up to […]

The aim of the experiment was to evaluate the effect of two stocking rates (CA280= 280 kg and CA360= 360 kg of live weight/ha) on natural pasture and of two breed compositions (½ Nelore ½ Hereford and ¼ Nelore ¾ Hereford) on milk production of primiparous beef cows and on growth of their calves. The stocking rate did not affect milk production (CA280 = 6.16 and CA360 = 5.88 kg/cow/day). Breed composition of cows significantly affected milk production, with ½ […]

The acquired immunity by newborns calves is dependent of ingestion and absorption of adequate quantity of colostral immunoglobulins. Supplemental pooled colostrum can be an important procedure to correct miscarried management. This study was performed to evaluate the effect of additional colostrum of super immunological quality at 12 hours of live on total serum protein and immunoglobulin G concentration in newborn calves. Fourty five newborn calves, separated in two treatments: Treatment 1 – additional colostrum 12 hours after birth (10% body […]