Weberte Alan Sombra

Desempenho produtivo e características de carcaça de ovinos em confinamento alimentados com rações contendo torta de mamona destoxificada em substituição ao farelo de soja

The objective of this study was to evaluate the influence of four substitution levels (0; 33; 67 and 100%) of soybean meal by detoxified castor cake on performance and carcass characteristics of 20 non-castrated male crossbred Morada Nova lambs, with mean body weight of 18.7 kg, in a randomized blocks design with four treatments and five replicates. Performance, carcass weight, carcass yield and relative composition of the commercial cuts were evaluated. The substitution levels of soybean meal by detoxified castor cake had no effect on final live weight or total weight gain in feedlot, but it caused decreasing linear effect on average daily gain and feed conversion ratio was observed. There was no effect of the substitution levels of soybean meal by detoxified castor cake on final body weight, live weight at fasting, empty body weight, hot carcass weight or cold carcass weight. The hot carcass yield was affected by substitution levels; the same behavior was observed for cold carcass yield. Rib weight and yield and shoulders yield had linear decrease of substitution levels of soybean meal by detoxified castor cake, whereas weight and yield of other regions did not present any effect for the substitution levels. Detoxified castor cake can be utilized in levels of up to 67% in substitution of the soybean meal in sheep diets.

Efficiency of metabolizable energy utilization for maintenance and gain and evaluation of Small Ruminant Nutrition System model in Santa Ines sheep

This study was carried out to estimate efficiencies of the utilization of metabolizable energy for maintenance (km) and weight gain (kg) and to evaluate the Small Ruminant Nutrition System (SRNS) model in predicting dry matter intake and average daily gain of growing Santa Ines sheep. Twenty-four non-castrated Santa Ines sheep, at 50 days of age and with average body weight of 13.00 ± 0.56 kg, respectively, were used. After a 10-day adaptation period, four animals were slaughtered to be used as reference for estimating initial empty body weight and body composition of the other animals. The remaining animals were distributed in a random block design, with the treatments consisting of diets containing different levels of metabolizable energy (2.08, 2.28, 2.47 and 2.69 Mcal/kg of DM), with five replicates. The metabolizable energy use efficiencies for maintenance and for weight gain were calculated from the relationship between the dietary net energy for maintenance and gain and ME concentration in the diets. Evaluation of the SRNS model was performed by adjustment of simple linear regression model between the predicted (independent variable) and observed (dependent variable) values. The estimated energy use efficiency for maintenance (km) was 0.70; and for gain weight (kg) it showed to be inversely proportional to the increase of metabolizable energy concentration in the diet. The dry matter intake predicted by the SRNS model did not statistically differ from that observed, but the model overestimated the average daily gain by 5.18%. Those results can contribute to the construction of a database, which could be condensed into several others in a predictive model of performance and feed planning for sheep reared in Brazil.

Uso de mesa vertical como parâmetro para regulagens de turboatomizadores

O consumo excessivo de agrotoxicos na agricultura brasileira e preocupante, e um dos fatores que contribuem para este excesso e o uso incorreto dos equipamentos de aplicacao, causando grandes problemas de contaminacao ambiental. O sucesso de uma aplicacao agricola somente e efetivado quando se consegue atingir o alvo com a menor contaminacao ambiental possivel. O objetivo deste trabalho foi comparar o perfil da distribuicao vertical de um turboatomizador com e sem fluxo de ar e o numero de bicos utilizados nos ramais, utilizando-se de uma mesa vertical como parâmetro de avaliacao. O conjunto utilizado foi um trator marca VALTRA, modelo BM-120 4x2 TODA, e um turboatomizador da marca Jacto, modelo ARBUS 400 GOLDEN, com pontas do tipo J5-2, pressao de 1378 kPa e velocidade do ar de 35 m s-1. O numero de bicos nao influenciou no perfil de distribuicao volumetrico. O fluxo de ar influenciou no perfil de distribuicao volumetrico tanto para o lado direito quanto para o lado esquerdo. Os maiores volumes ocorreram abaixo de 1,16 cm com o turboatomizador utilizando ou nao o fluxo de ar, com 12 ou 6 pontas.

Características de carcaça em ovinos alimentados com rações contendo torta de mamona

To evaluate the effects of rations containing castor cake on sheep carcass and non carcass components characteristics, this research was undertaken. Twenty Morada Nova sheep (initial weight of 18,7±1,18kg) were assigned to a complete randomized block design according to sex (whole males and females), with five treatments (castor cake untreated, castor cake treated with limestone, urea, phosphate monodicalcium and autoclaved) and four repetitions. There wasn’t difference in dry matter intake, total weight gain and weight of slaughter between treatments and therefore didn’t occur in most variables between treatments. However, animals fed with rations containing castor cake autoclaved and castor cake treated with phosphate monodicalcium were higher than those fed untreated castor cake. The loss in fast, there was difference between animals fed with rations containing castor cake autoclaved and animals fed with castor cake treated with urea, resulting also in difference in the percentage empty body weight. Animals fed with rations containing treated with phosphate monodicalcium had higher weight of rumen-reticulum in relation to the animals fed with ration containing castor cake treated with urea. The rib eye area was greater on animals fed castor cake autoclaved and treated with phosphate monodicalcium. In general, the castor cake untreated not affect carcass and non carcass components.

Calibration of angles of nozzles and deposition of an axial-flow sprayer on dwarf cashew

The study aimed to determine an optimum angle for the nozzles axial-flow sprayers a deposition for better vertical distribution focused on cashew. In laboratory tests were conducted adjusting the angle of the nozzle axial-flow sprayers. The experimental design was randomized blocks in a 2x3 factorial with four replications. The treatment for this test were two settings (with and without the adjustment of the angles of the nozzles ) and tree application volumes 273, 699 and 954 L ha-¹.The study was conducted in an orchard of dwarf cashew, with eight years of age. It was concluded that the volumetric distribution profile showed better vertical distribution uniformity when the angles of the nozzles were regulated for the canopy, the adjustment of the angles of the nozzles for the canopy provided greater deposition of droplets, the increased volume of application resulted in higher depositions in the leaves of the crop.

Viabilidade econômico-financeira do confinamento de ovinos alimentados com rações contendo torta de mamona

Twenty sheep were placed in a completely randomized block design and submitted to one of five treatments testing castor cake as a ration ingredient (untreated castor cake, treated with limestone, with urea, with mono-dicalcium phosphate and autoclaved) to evaluate their performance and the economic output. The roughage consisted of tifton-85 bermudagrass hay. The market prices of the rations ingredients, body weight (BW) and the carcass weight were considered to identify the minimum conditions for the enterprise to become economically feasible. After obtaining the ration cost and the dry matter intake, the technical, zootechnical and economic indexes were analyzed using the Excel ® program. The daily production (kg of BW or kg of carcass) was higher for sheep eating rations with autoclaved castor cake and treated with mono-dicalcium phosphate, showing the highest production system turnover and providing the highest number of finished animals on a yearly basis. These production systems showed the highest gross income. The animal purchase and feeding were the most representative items on BW production expenses, representing 44.8 and 43.3%/year on average, respectively. Adopting R

Pressão de preconsolidação de um Argissolo Vermelho-Amarelo submetido ao tráfego de trator agrícola

4.70/kg BW and R

VARIABILIDADE ESPACIAL DE ATRIBUTOS FÍSICOS EM SOLO SUBMETIDO À DIFERENTES TIPOS DE USO E MANEJO

13.40/kg carcass as sell prices, the production system containing castor cake treated with mono-dicalcium phosphate showed the best economic output, with a 1.07 benefit/cost, a R

Pontas de pulverização de jato cônico vazio, em função das pressões de trabalho

73,117.34 liquid present value (LPV), 54% internal return rate (IRR) and a R

USO DE UMA MESA VERTICAL COMO PARÂMETRO PARA REGULAGENS DE TURBOATOMIZADORES

4.32 BW total cost. On the other hand, the production system using non-treated cake as the ingredient showed a 1.00 benefit/cost, R