The aim of this work was to evaluate different models in which the random effects of litter and maternal genetic (correlated or not with the direct additive genetic effect) were added in sequence to the direct additive genetic random effect. There were on farm records of 17,563 Landrace (LD) and 8679 Large White (LW) animal. The comparison of the models and significance levels of each effect added were determined by the Likelihood Ratio test. Variance components were estimated using the […]

The digestibility of ether extract (EE), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose (HCEL) and cellulose (CEL) of a total ration was evaluated. The ration, composed by 44.3% Brachiaria hay, 55% concentrate and 0.7% mineral mixture, was fed to animals of different genetic groups (Gyr, Nellore, Guzera, Santa Gertrudis and Caracu), using total feces collection and internal marker (acid detergent lignin – ADL). The data were analyzed in a completely randomized design, with three replications […]

The experiment was carried out with 20 intact Holstein male calves, 75 days old, with mean live weight of 76 kg, submitted to the same nursing system before starting the experiment. The objective was to evaluate the relative size of internal organs and viscera of these animals fed diets containing 45, 60, 75 and 90% of concentrate. Diets were composed of coastcross hay, ground corn grain, soybean meal and mineral mixture. The experimental design was a randomized blocks, with four […]

This study was conducted to evaluate methods of balancing climatic demand (ECA = class A tank evaporation and PRP = rainfall) with soil conditions (CAD = water storage capacity) of na Hapludox soil, in order to manage supplementary water of alfalfa cultivar Crioula on field conditions. Therefore, the behavior of alfalfa under three soil water conditions (H1 = no irrigation; H2 = efficient water use at plants full vegetative stage when ECA ¾ PRP ³ 30 mm; H3 = full […]

Two metabolism assays were carried out in order to evaluate the aparent metabolizable energy (AME) and true metabolizable energy (TME) values of 11 feedstuffs (corn and corn byproducts and of the millet samples) by using the traditional method of excreta collection with growing chickens and the forced feeding method, by using adult cockerels (Sibbald method). In the first assay, 540 male Hubbard chickens fed the experimental diets in four replicates with ten birds in each experimental unit and the basal […]

The present work was carried out to evaluate the effect of diets with different protein sources of ruminal degradability and corn silage prepared with or without the inoculant PIONEER 1174 on animal performance. A factorial experiment was conducted, where the protein sources (meat and bone meal, urea and a mixture of both [50:50]) were combined with two types of silage, composing six treatments. Thirty six 3.5 years old Santa Gertrudis steers were randomly assigned to the treatments. There were no […]

With the objective of determine the bioavailability of two lysine sources (lysine HCl and lysine sulfate), by a growth trial, 840 one day old male broiler chicks were placed in 56 boxes. Two basal diets were formulated to supply the birds nutritional requirements, one for the starting and the other for the growing period, respectively, deficient only in lysine, which were supplemented 0,08, 0,16 and 0,24% lysine of both lysine sources. Weight gain, feed intake, feed conversion, carcass yield, legs […]

An experiment was conducted to evaluate the effect of environmental temperature on the bullfrog performance in the growing phase. Four hundred and fuve frogs, weighing 37,5±1,5 grams, were assigned to a randomized experimental design with three treatments (20,2±0,7°C, 25,1±0,4°C and 30,2±0,5°C), five replicates (boxes) and 27 frogs in each replicate. The experimental period was of 45 days, being ten days for adaptation of the frogs to the installations and the feeding. The daily feeding comprised one commercial ration of trout […]

This research was carried out, using 15 dairy cows (Holstein x Gyr) full fed isoproteic diets with 60% silage and 40% concentrate in the dry matter (DM) basis and 0, 0.7, 1.4, and 2.1% urea correspondent to 2.08, 4.01, 5.76, and 8.07% of crude protein levels in the form of non protein nitrogen compounds (NNP), with the objectives to a non invasive methodology, to estimate the microbial protein production, using the total excretion of purine derivatives (PD); to evaluate the […]

To study heterogeneity of variances and to estimate the heritability coefficients at different levels of herd milk production and at different levels of standard deviation records on 13,053 lactations of 6,828 Holstein cows, sired by 811 bulls and distributed in 78 herds in the State of Rio Grande do Sul from 1988 a 1997 were analyzed. The herds were grouped by milk production and were stratified by the standard deviation of milk production (305 days) in three levels (low, medium […]