The experiment in a complete randomized design aimed to test the effect of two packing densities, 500 kg (medium) and 600 kg (high) of silage mass per cubic meter, on silage quality as compared to the original fresh material. Silages were prepared on May 18th, 2004 from a late season harvest of a maize crop at the half milky half dough kernel stage. Chopped materials with 1.2 cm theoretical particle size were packed manually in 30 liters mini-silos, in four […]

A genome of 3.000 centimorgans was simulated for a single quantitative trait governed by 800 loci with two alleles per locus. According to the genomic structure proposed, 1,500 males and 1,500 females constituted the base population which was used to form two (small and large) initial populations. Two types (only additive genetic variance and both additive genetic and environmental variances) and three variability levels (high, medium and low) of heterogeneity of variances were inserted in the initial populations. Variance components […]

Economic values were calculated to evaluate the economic importance of possible traits to be included in breeding goals, for different production systems of Nelore cattle. Two types of production systems (cow-calf and complete breeding cycles) were simulated for two types of herds. Herd 1 was defined as a nucleus herd (where selection was carried out and a percentage of animals were also raised for commercial purposes), with cow-calf (Cc), complete breeding cycle (Cbc) and complete breeding cycle with sales of […]

An experiment was carried out to verify the effect of different dietary Na levels on the performance and egg quality of laying Japanese quail during the peak of production (69 to 132 days old). A total of 300 laying Japanese quails aged 69 days was allocated to 30 experimental units with ten birds each. The quails were assigned to a completely randomized design, with five treatments, six replicates. The Na levels studied were 0.017, 0.083, 0.149, 0.215, and 0.281% corresponding […]

An experiment was conducted with the objective to evaluate the type of whole soybean processing to be used in the feeding of growing-finishing swine. Sixty pigs, gilts and barrows, with initial average weight of 24.96 kg and age of 70 days, were distributed to a complete randomized block design, with five treatments, each one with 12 replicates, and six per each sex. The experimental unit was composed by one animal in an individual box. Experimental diets were isonutritious and based […]

An experiment was conduced to evaluate crude protein (CP) levels and amino acid supplementation for gilts from 30 to 60 kg maintained in a high environmental temperature (air temperature of 30ºC; relative humidity of 66.1% and BGHI of 79.7). Fifty crossbreed gilts (Landrace X Large White) with an average initial weight of 30.2 kg were allotted to a randomized experimental design with five treatments and five replications and two animals per experimental unity. The treatment consisted of five levels o […]

Two experiments were conducted to evaluate the influence of water and feed restriction during the pre-starter phase on the broilers performance and organs development (heart, liver, gizzard and intestines). In each experiment, a 480 males Ross chicks was allotted to a five levels (0, 10, 20, 30 and 40%) of water or feed restriction during the first seven days of age. The broilers were fed with the same diet, in nutritional composition, in all treatments. With water or feed restriction, […]

The objective was to study the effects of partial replacing of corn silage by corn gluten feed (CGF-21) dehydrated on milk production and composition of milk and in the blood parameters of dairy cows, beyond the economic evaluation. Inclusion levels of 0, 8 and 16% of CGF-21 (% DM) to the diets were evaluated. Thirty cows were used for study of milk production and composition and fifteen cows for blood parameters study. A 3 x 3 Latin Square experimental design […]

This research was carried out with the objective to evaluate the raising systems in deep-bedding (wood shavings and rice husk) and the traditional system of concrete floor, and its influence in the thermal environment (BGTHI [Black Globe Temperature and Humidity Index] and surface temperature of both floor and bed), and swine animal performance from 25 kg to 120 kg. Two hundred sixteen animals were used (Landrace x Large White), 72 per raising system (18 pigs/pen). For comparison, the animals were […]

The trial aimed to evaluate the effect of particle size (small: from 0.2 to 0.6 cm or large: from 1.0 to 2.0 cm) and cutting height (low cut: 15 cm or high cut: 39 cm) of the corn plant on the dynamics of the silage fermentation process and feed-out period. The treatments were: T1 – small particle size with low cutting height; T2 – large particle size with low cutting height; T3 – small particle size with high cutting height; […]