João Dimas Graciano

Incidence and physical properties of PSE chicken meat in a commercial processing plant

It is known that PSE meat present important functional defects, such as low water holding capacity and ultimate pH, which may compromise the quality of further-processed meat products. In this study, L* (lightness), a* (redness), and b* (yellowness) values of 500 chicken breast fillets were determined using a portable colorimeter (Minolta, model CR-400) in a commercial processing plant. Fillets were considered pale when their L* was ≥49. Out of those samples, 30 fillets with normal color and 30 pale fillets were evaluated as to pH, drip loss, cooking loss, water holding capacity, shear force, and submitted to sensorial analysis. An incidence of 10.20% PSE meat was determined. Pale and normal fillets presented significantly different (p≤0.05) pH values, L* and a* values, water holding capacity, drip loss, and cooking loss, demonstrating changes in the physical properties of PSE meat. Shear force and sensorial characteristics were not different (p>0.05) between pale and normal fillets. Despite the significant differences in meat physical properties, these were not perceived by consumers in terms of tenderness, aspect, and flavor. The observed incidence of PSE may cause losses due to its low water retention capacity.

Litter materials and the incidence of carcass lesions in broilers chickens

The aim of this study was to evaluate the effects of different litter materials on litter compaction, broiler feathering and the incidence of carcass lesions. In the experiment, 3240 one-day-old Ross® chicks were selected by sex and distributed according to a completely randomized experimental design in a 2 x 6 factorial arrangement (two sex and six litter materials). The following litter materials were used: wood shavings, rice husks, chopped Napier grass, 50% sugar cane bagasse plus 50% wood shavings, 50% sugar cane bagasse plus 50% rice husks, and pure sugar cane bagasse. Litter compaction was weekly assessed using a penetrometer. On days 21, 35 and 42 of the experimental period, feathering on the back and legs was scored according to a 0 - 10 scale. On day 42, birds were slaughtered and the presence of bruises, scratches and footpad lesions was recorded. Litter material had no effect on bird feathering. Carcass lesions (scratches, bruises and footpad lesions) were influenced by the litter material evaluated. Birds reared on sugarcane bagasse and chopped Napier grass presented more scratches, bruises and footpad lesions than the others. Dermatitis was more evident in birds reared on sugarcane bagasse, chopped Napier grass and the combination of litter materials. It was found that males presented higher incidence of dermatitis and footpad lesions than females. Each litter material presented different compaction degrees, which increased along the experimental period. Sugarcane bagasse, chopped Napier grass and the combination of bedding materials presented the highest degree of compaction, compared with wood shavings and rice husks.

Effect of the litter material on drinking water quality in broiler production

Considering the importance of drinking water and its effect on broiler performance, drinking water quality was studied using six different litter materials. The presence of coliform bacteria and Escherichia coli was investigated. The following litter materials were used in the trial: wood shavings, rice husks, chopped Napier grass (Pennisetum pupureum), 50% sugarcane bagasse (Saccharum L.) + 50% wood shavings, 50% sugarcane bagasse (Saccharum L.) + 50% rice husks, and plain sugarcane bagasse (Saccharum L.). A number of 1620 Ross ® one-dayold chicks were reared in 54 pens measuring 4.5 m 2 each, equipped with a bell drinker and a tube feeder. Water samples were collected in sterile tubes on days 28 and 42 of the rearing period, and submitted to the laboratory for analyses. Microbiological data were organized by classes expressed in a logarithm scale, where the lowest contamination corresponds to class 1 and the highest contamination to class 4. Results showed that total coliform contamination was higher on day 28 than in the end of the rearing period, and that E. coli presence was detected during both analyzed periods. The litter materials that presented lower degree of water contamination, predominantly class 1, were sugarcane bagasse and 50% of sugarcane bagasse and 50% of rice husks.

Número de fileiras no canteiro e espaçamento entre plantas na produção e na rentabilidade da beterraba em Dourados, estado do Mato Grosso do Sul

This work had as objective to determine the yield, gross income and gross income minus seed cost of ‘Tall Top Early Wonder’ beet in answer to the use of four and five rows per plot and spaces of 5.0; 7.5 and 10.0 cm between plants. Harvest was done at 116 days after sowing, when the height of plants, fresh mass of leaves, diameter and length of roots and fresh mass of commercial and non-commercial roots were evaluated. The validation of this work was done by determination of gross income and gross income minus seed cost obtained per cultivated hectare. None of the evaluated characteristics was influenced significantly by the interaction of number of rows/spaces between plants. The highest gross income (R

Número de fileiras no canteiro e espaçamento entre plantas na produção e na rentabilidade da beterraba em Dourados-MS

6,700.00) came from the treatment with five rows per plot and 5.0 cm among plants, and the highest gross income minus seed cost (R

Número de fileiras no canteiro e espaçamento entre plantas na produção e na rentabilidade da beterraba em Dourados-MS - DOI: 10.4025/actasciagron.v30i3.3550

5,654.00) was from the treatment with five rows and 10.0 cm between plants. It was concluded that to obtain the greatest yield of beet, five rows of plants per plot and 5.0 cm between plants must be used, but to obtain the highest gross income minus seed cost, five rows per plot and 10.0 cm between plants must be used.

Efeito da cobertura do solo com cama-de-frango semidecomposta sobre dois clones de mandioquinha-salsa

This work had as objective to determine the yield, gross income and gross income minus seed cost of ‘Tall Top Early Wonder’ beet in answer to the use of four and five rows per plot and spaces of 5.0; 7.5 and 10.0 cm between plants. Harvest was done at 116 days after sowing, when the height of plants, fresh mass of leaves, diameter and length of roots and fresh mass of commercial and non-commercial roots were evaluated. The validation of this work was done by determination of gross income and gross income minus seed cost obtained per cultivated hectare. None of the evaluated characteristics was influenced significantly by the interaction of number of rows/spaces between plants. The highest gross income (R

Produção e renda bruta de quatro clones de taro cultivados em Dourados, Estado do Mato Grosso do Sul

6,700.00) came from the treatment with five rows per plot and 5.0 cm among plants, and the highest gross income minus seed cost (R

Espaçamento entre fileiras e entre plantas na produção da mandioquinha-salsa 'Branca'

5,654.00) was from the treatment with five rows and 10.0 cm between plants. It was concluded that to obtain the greatest yield of beet, five rows of plants per plot and 5.0 cm between plants must be used, but to obtain the highest gross income minus seed cost, five rows per plot and 10.0 cm between plants must be used.

Produtividade de mandioquinha-salsa sob diferentes densidades de plantio e tamanho das mudas

This work had as objective to determine the yield, gross income and gross income minus seed cost of ‘Tall Top Early Wonder’ beet in answer to the use of four and five rows per plot and spaces of 5.0; 7.5 and 10.0 cm between plants. Harvest was done at 116 days after sowing, when the height of plants, fresh mass of leaves, diameter and length of roots and fresh mass of commercial and non-commercial roots were evaluated. The validation of this work was done by determination of gross income and gross income minus seed cost obtained per cultivated hectare. None of the evaluated characteristics was influenced significantly by the interaction of number of rows/spaces between plants. The highest gross income (R