O Brasil sacrifica muitos bezerros de origem leiteira ao nascer, o que pode se tornar um problema mercadológico bastante sério. O objetivo deste experimento foi avaliar a composição física da carcaça e as características qualitativas da carne de bezerros holandeses terminados em confinamento ou em pastagem com suplementação, abatidos aos 140; 180; 220 ou 260 kg de peso corporal. No início da terminação, os bezerros apresentavam em média 57 kg e 58 dias de idade. Os animais confinados foram alimentados com volumoso (silagem de milho) e concentrado, na proporção de 40:60 e os da pastagem suplementados com concentrado a 1% do peso corporal. O delineamento experimental foi o inteiramente casualizado, em arranjo fatorial 2 x 4 (dois sistemas de terminação x quatro pesos de abate). Foi observada interação significativa entre peso de abate e sistema de terminação somente para a textura da carne. Os animais terminados em pastagem apresentaram melhor textura com o aumento do peso, enquanto que os animais confinados o peso não influenciou. Animais terminados a pasto apresentaram maior percentagem de músculo (69,48% contra 66,57%), menor percentagem e quantidade de gordura (9,58% e 9,75 kg contra 13,20% e 13,08 kg respectivamente) em relação aos animais do confinamento. Houve crescimento linear para a quantidade total de músculo, osso e gordura, relação músculo/osso, relação porção comestível/osso, palatabilidade e suculência quando se elevou o peso de abate. O percentual de osso e a cor da carne decresceram linearmente com o aumento do peso de abate. A percentagem de músculo e gordura apresentaram comportamento quadrático. Os animais de raças leiteiras são excelentes produtores de carne magra, com boa maciez, palatabilidade e suculência.

The Brazil sacrifices many dairy calves at birth, which can become a very serious problem merchandising. The objective of this experiment was to evaluate the physical carcass composition and meat quality characteristics of Holstein calves in feedlot or pasture with supplementation, slaughtered at 140, 180, 220 or 260 kg body weight. In the early termination calves had on average 57 kg and 58 days of age. The confined animals were fed forage (corn) and concentrated, in the ratio of 40:60 and concentrated pasture supplemented with 1% body weight. The experimental design was completely randomized in a factorial 2 x 4 (two feeding systems x four slaughter weights). It was observed a significant interaction between slaughter weight and finishing system only for the texture of the meat. The finished animals on pasture showed improved texture with increased weight, whereas the confined animals did not affect the weight. Animals finished on pasture had higher muscle percentage (69.48% vs 66.57%), and lower fat percentage (9.58% and 9.75 kg vs 13.20% and 13.08 kg) compared to confined animals. There was a linear increase in the total amount of muscle, bone and fat, muscle / bone ratio, compared edible portion / bone, palatability and juiciness when increased slaughter weight. The percentage of bone and meat coloring decreased linearly with the increase of slaughter weight. The proportion of muscle and fat, showed quadratic behavior. The animals of dairy breeds are excellent producers of lean meat, with good smoothness, flavor and juiciness.

O objetivo, deste trabalho, foi avaliar o desempenho agronômico de genótipos de milho, no município de Dois Vizinhos, Paraná, Brasil, em condições de restrição hídrica. Foram avaliados 36 genótipos pertencentes ao ensaio Sul Super Precoce quanto aos caracteres relacionados com a produção de grãos. Os genótipos utilizados foram fornecidos pela Embrapa Milho e Sorgo e fazem parte dos Ensaios de competição de cultivares de milho do Brasil. O cultivo foi realizado em condições de sequeiro, sendo o fornecimento de água limitado à ocorrência de precipitações pluviométricas. O experimento foi realizado na área experimental da Universidade Tecnológica Federal do Paraná, no delineamento experimental látice simples. As condições climáticas ocorridas durante o experimento foram de deficiência hídrica severa, interferindo negativamente no rendimento de grãos, assim como na variabilidade de resposta dos genótipos avaliados; mesmo nessas condições foi possível classificar os materiais quanto à maioria dos caracteres avaliados, sendo ‘30P34’ o mais produtivo com 4,73 T ha-1.

The aim of this study was to evaluate the agronomic performance of maize genotypes in the municipals of Dois Vizinhos, Paraná, Brazil, in conditions of water restriction. We evaluated 36 genotypes belonging to the Early Super South test regarding the characters related to grain production. The genotypes used were supplied by Embrapa Maize and Sorghum and are part of the competition trials of maize cultivars in Brazil. The culture was grown under rainfed conditions, with limited water supply to the occurrence of rainfall. The experiment was conducted at the experimental Universidade Tecnológica Federal do Paraná, the experimental design were simple lattice. The climatic conditions that occurred during the experiment were of severe drought, negatively affect the yield and variability of response of genotypes, even in these conditions it is possible to classify materials for most of the traits, being ‘30P34’ the most productive with 4.73 t ha-1.

In order to evaluate the effect of the different percentages of zebu blood in the genotype of crossbred steers on carcass traits, a meta-analysis was carried out, using 30 studies conducted in Brazil that have been published since the year 2000. The parameters evaluated were hot carcass weight (221 estimates), cold carcass weight (232), hot carcass (236) and cold carcass yield (223), subcutaneous fat thickness (238) and the percentages of saw cut (233), forequarter (234) and sidecut (246 estimates). Initially, exploratory analysis was performed for each of the variables for detection of publication vices through the dispersion of observations by pointing out the outliers eliminated. Normality tests were normal and the data were subjected to analysis of variance for the regression study, which were assessed to the third degree. Weights of hot carcass and cold carcass, hot and cold carcass yield and the percentage of saw cut had a quadratic effect on animals with the presence of zebu blood, indicating superiority of crossbred animals. The regression equation showed that 66; 50; 72; 81 and 59% of zebu in crossbred animals showed higher hot and cold carcass weight, hot and cold carcass percentage and saw cut, respectively. Fat thickness was not influenced by the degree of zebu in the genotype. The percentage of forequarter has a positive response by increasing the degree of zebu in the genotype, while the sidecut has a negative answer. The crossbreeding between zebu and European breeds provides carcasses with better quality than purebred animals.