The aim of this study was to evaluate the effect of genetic groups and diets with different sources of nonprotein nitrogen (NPN) on the carcass and meat characteristics of beef heifers. The meat from 40 heifers (20 ½ Angus ½ Nellore (A × N) and 20 ½ Charolais ½ Nellore (L × N)), finished in feedlots, was used. The heifers were fed diets containing different sources of NPN—(1) a diet with livestock urea and protected urea (LPU) and (2) a diet with extruded urea (EU)—in a completely randomized design with a 2 × 2 factorial arrangement. Carcass, composition and meat quality evaluations were carried out. There were no significant interactions between diet and genetic group for most of the variables evaluated (p > 0.05). The A × N heifers had higher hot carcass weights (305.73 vs. 279.80 kg), loin eye areas (80.87 vs. 75.45 cm²), subcutaneous fat thicknesses (8.69 vs. 6.35 mm) and lower shear forces (6.98 vs. 7.7 kg) compared to the C × N heifers (p < 0.05). The meat from the A × N heifers had higher proportions of saturated fatty acids (49.41 vs. 47.95%), with no effects on the proportions of monounsaturated (47.57%) and polyunsaturated (4.01%) fatty acids. The A × N heifers had better carcass and meat characteristics, while the C × N heifers had meat and fat with better fatty acid profiles.

This study proposes to undertake an economic assessment of the inclusion of different levels of distillers dried grains with solubles (DDGS) in diets for pigs in different production stages and categories (growing and finishing), namely: barrows fed diets containing 0 or 20% DDGS; and finishing barrows and sows fed diets containing 0, 10, 20, and 30% DDGS. A sensitivity analysis was performed on the price of corn in three simulated scenarios with different revenue systems: an optimistic scenario (lowest price); a regular scenario (medium price); and a pessimistic scenario (highest price). Inclusion of DDGS in the swine diet can reduce feeding costs and improve the profitability of production, about finishing males and females, the profit per kilogram of weight gain (US$/kg) were better in 10% of DDGS inclusion, 0.23, 0.28 respectively, but for growing and finishing, it was smaller in 20% (0.32 US$/kg) of DDGS inclusion than the 0% control treatment (0.33 US$/KG). The inclusion of DDGS must be carefully planned, since its use may depress animal performance and its inclusion is linked to the costs of the other ingredients that make up the diet.

Consumidores de carne bovina: comportamento e preferências / Beef consumers: behaviour and preferences

Aplicabilidade de sistemas de simulação bio-econômica de propriedades rurais de bovinos de leite / Applicability of bioeconomic simulation systems of dairy cattle farms

Fatores relacionados ao consumo da carne de peixe pela população de Campo Grande, MS, Brasil / Factors related to the consumption of fish meat by the population of Campo Grande, MS, Brazil

The objective of this work was to evaluate the composition of macro- and microelements in samples of bee honey (Apis mellifera) produced in different floral resources: aroeira (Myracrodruon urundeuva), cissus (Cissus rhombifolia), eucalyptus (Eucalyptus spp.), orange (Citrus sinensis), and honey of Jataí (Tetragonisca angustula). The content of macro- and microminerals in the honey samples were determined by inductively coupled plasma-optical emission spectrometry (ICP-OES). The results showed concentration levels of macro- (Ca, P, K, Mg, and Na) and microelements (Al, [...] ABSTRACT The objective of this work was to evaluate the composition of macro- and microelements in samples of bee honey (Apis mellifera) produced in different floral resources: aroeira (Myracrodruon urundeuva), cissus (Cissus rhombifolia), eucalyptus (Eucalyptus spp.), orange (Citrus sinensis), and honey of Jataí (Tetragonisca angustula). The content of macro- and microminerals in the honey samples were determined by inductively coupled plasma-optical emission spectrometry (ICP-OES). The results showed concentration levels of macro- (Ca, P, K, Mg, and Na) and microelements (Al,