The objective of the present study was to evaluate the aerobic stability and losses during the fermentation process of triticale silages in single crop or in mixtures with oats and/or legumes. The following crops were used for silage production: triticale (X. Triticosecale Wittimack), triticale intercropped with forage pea (Pisum arvense) and triticale intercropped with oats (Avena strigosa Schreb), forage pea and vetch (Vicia sativa). The dry matter content and its recovery did not differ among the silages. Buffer capacity was […]

The objectives of this work were to evaluate different models, regarded to considered maternal effects, for growth traits and to estimate genetic parameters for these traits in Canchim breed bovine, by one, two and multitrait analyses. The weight traits at birth, at weaning, standardized weight for 12, 18, 24 and 30 months of age in males and females, and mature female weight were analyzed using four models with random effects added in sequence. Maternal effects influenced birth weight at 2 […]

The present study aimed to evaluate the possibility of reducing the dietary protein content for post-larvae of Pacific white shrimp (Litopenaeus vannamei) through diet supplementation with taurine amino acid. Six practical isoenergetic (15.48 kJ ME/g) diets were formulated to contain two protein concentrations (35% and 45% crude protein, CP) and 3 levels of taurine supplementation (0, 5 and 10 g/kg) in a 2 × 3 factorial scheme, with four replicates. One hundred post-larvae (initial weight 0.14 ± 0.01 g) were […]

The experiment was conducted to determine fractioning of carbohydrate and protein of elephantgrass silage containing cassava meal, coffee hulls and cocoa meal. A completely randomized experimental design was used in a 3 × 4 factorial scheme, composed of three byproducts added to elephantgrass at four levels (0, 10, 20 and 30% of natural matter), each one with five repetitions. The material was ensiled in PVC silos, which remained closed for 60 days. Cassava meal contributed to reduce the content of […]

This study aimed at mapping QTL (quantitative trait loci) using linear combinations of characteristics of economical interest in Gallus gallus. A total of 350 F2 chickens from an initial crossing among males from a broiler line (TT) with females from a layer line (CC) were used. It was conducted a QTL mapping in chromosomes of Gallus gallus (GGA1, GGA3, GGA5, GGA8, GGA11, and GGA13) for 20 performance and carcass traits. For detecting QTL, it was used the likelihood ratio test […]

The objective of this work was to evaluate the effect of increasing levels of concentrate and crude protein in the diets, in which intakes of dry matter and nutrients, coefficients of digestibility, milk production and composition and efficiency of food use were evaluated. Twenty cows in lactation were distributed in a random block design, with five replicates per diet, defined according to milk production. The experimental diets were constituted of sorghum silage as roughage and concentrate at the following levels: […]

Genetic parameters and genetic and phenotypic trends were estimated for weight at weaning (WW) and visual scores (VS) of conformation (C), precocity (P), musculature (M) and navel (N) for Angus × Nellore crossbred calves. It was used 39,676 records from pre-weaning phase of animals born from 1992 to 2002 in mid-western, southeastern and southern Brazil. The components of covariance were estimated using REML, in animal model, considering as random the maternal and direct additive genetic effects, and as fixed, the […]

This work aimed at evaluating egg production in Isa Brown hens fed diets with different levels of digestible lysine and chelate zinc. It was used 720 brown laying hens, in two evaluation periods, from 24 to 36 and from 48 to 60 weeks of age. The diets were evaluated in a completely randomized design in a 5 × 3 factorial scheme composed of five levels of digestible lysine (0.482; 0.527; 0.582; 0.644 and 0.732%) and three levels of chelate zinc […]

It was tested the effects, in a medium term, of four methods to control undesirable plants on forage production and dynamic of vegetation in a representative area of natural pasture in the transition between Serra do Sudeste and the Depressão Central in Rio Grande do Sul. The control methods were the following: without control, mechanical control with spring mowing, mechanical control with autumn mowing and chemical control with Tordon commercial herbicide based on Picloram + 2,4-D at the dosage 5 […]

This study evaluated the response of dairy heifers fed corn based silage with 1.3 kg/day of concentrated in comparison with three sugar cane-based diets corrected with 1% of urea + ammonium sulphate (9:1) (urea), with 1.3; 2.0 and 2.7 kg/day of concentrate. A total of 20 heifers were used (12 Holstein breed and 8 Brown Swiss breed heifers) in a randomised block design, with 5 blocks formed on the basis of initial live weight and breed. The consumption of dry […]