Rossi R.M.,State University of Maringá |
Martins E.N.,Jardim Universitario |
Lopes P.S.,Federal University of Viçosa |
Silva F.F.,Federal University of Viçosa
Pesquisa Agropecuaria Brasileira | Year: 2014
The objective of this work was to present alternative uni- and bivariate modeling procedures for the evaluation of feed conversion (FC) of the Piau swine breed, using Bayesian inference. The effects of sex and genotype on animal FC were evaluated by the Markov chain Monte Carlo (MCMC) and the integrated nested Laplace approximation (INLA) procedures. The univariate model was evaluated using different distributions for the error - normal (Gaussian), t-Student, gamma, log-normal, and skew-normal -, whereas, for the bivariate model, the normal error was considered. The skew-normal distribution was the most parsimonious model to infer on the direct response (univariate) of FC to the effects of sex and genotype, which were nonsignificant. The bivariate model was capable to identify significant differences on weight gain and feed intake in significance levels not detected by the univariate model. Moreover, it was also able to detect differences between sexes, when grouped by NN (male, 2.73±0.04; female, 2.68±0.04) and Nn (male, 2.70±0.07; female, 2.64±0.07) genotypes, and revealed greater accuracy and precision for nutritional inferences. In both approaches, the Bayesian method proves flexible and efficient for assessing animal nutritional performance.
Avaci A.B.,Jardim Universitario |
de Souza S.N.M.,West Parana State University |
Chaves L.I.,West Parana State University |
Nogueira C.E.C.,West Parana State University |
And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2013
One of the biggest sources of energy available in rural areas is biomass and agribusiness. The same appears in the form of plant and animal residues such as crop residues, animal manure, energy crops and agro- industrial effluents. These residues can be used by the farmer or agribusiness for direct burning in order to produce heat or production of biogas. Swine production generates large amounts of wastes causing environmental problems if left untreated. The same has lot of methane. The objective of this study was to evaluate the production cost of electricity through biogas from swine manure. It was found that the best option for the producer is selling carbon credit when the production cost of electricity is viable when sold to utility power. The best condition was found to generate 20 h d-1, when the time for return on investment is 8 years and the production of electricity is R$ 120.11 kWh.
Allelopathy of Crotalaria juncea L. Aqueous extracts on germination and initial development of maize [La alelopatía de extractos acuosos de Crotalaria juncea L. Sobre la germinación de semillas y el crecimiento inicial del maíz]
Araujo da Cruz-Silva C.T.,West Parana State University |
Araujo da Cruz-Silva C.T.,Jardim Universitario |
Matiazzo E.B.,Paranaense University |
Pacheco F.P.,West Parana State University |
And 3 more authors.
Idesia | Year: 2015
The objective of this study was to evaluate the allelopathic potential of sunn hemp extracts on germination and initial development of maize. The trials were carried out in the laboratory and greenhouse with four concentrations (0; 7.5; 15 and 30%) of aqueous extracts obtained by grinding and leaching. In a germination chamber, more concentrated extracts (15% and 30%) inhibited maize germination, while shoot length (SL) was stimulated at 7.5% concentration. Ground extract stimulated root length (RL) at all tested concentrations. Root number (RN) was inhibited at higher concentrations of leached extract and stimulated for seeds exposed to sunn hemp ground extract. In the greenhouse, the longest root length (LRL) of maize was inhibited at the highest concentration (30%) of both extracts. The ground extract inhibited the LS in all concentrations and the 7.5% concentration stimulated the RN. It was concluded that sunn hemp extracts showed allelopathic effect on maize development, which varied according to how the extracts were obtained and concentrations used.
Neves M.P.,Jardim Universitario |
Delariva R.L.,West Parana State University |
Wolff L.L.,West Parana State University
Neotropical Ichthyology | Year: 2015
This study investigated the morphological and dietary relationships of the fish assemblage in a stream with an endemic fauna and low species richness. The ichthyofauna was sampled quarterly from September 2011 to July 2012, through the electrofishing technique. The stomach contents of 419 individuals belonging to seven species were analyzed by the volumetric method, and the ecomorphological traits of 30 specimens of each species were estimated. The main food items consumed were detritus, aquatic and terrestrial insects, and other aquatic invertebrates. We observed low levels of trophic niche breadth and diet overlap between most species. The PCA scores indicated the occurrence of three ecomorphotypes. PCA axis 1 segregated at one extreme, species with dorsoventrally depressed bodies, longer caudal peduncles, and welldeveloped swimming fins; and at the other extreme, species with compressed bodies and peduncles, and relatively larger eyes and anal fins. PCA axis 2 segregated species with elongated bodies and ventrally oblique mouths. The partial Mantel test revealed a significant correlation between diet and morphology, indicating independence from the phylogeny. The patterns observed suggest that the low richness did not result in a broadening of the species’ trophic niches, or in the absence of some of the main ecomorphotypes expected. © 2015 Sociedade Brasileira de Ictiologia.
de Lima G.P.,Jardim Universitario |
Nobrega L.H.P.,Jardim Universitario |
Coelho S.R.M.,Jardim Universitario |
Mauli M.M.,Jardim Universitario |
Rosa D.M.,Jardim Universitario
Journal of Food, Agriculture and Environment | Year: 2012
It is known that cover crops can influence on seed quality, as well as on yield cropping. This trial analyzed possible allelopathic interferences of black oat (Avena strigosa Schreb.) remains and a consortium of black oat, forage turnip (Raphanus sativus L.) and vetch (Vicia sativa L.) on cropped seeds quality and soybean yield according to different intervals between the drying of some cover crops with Glyphosate 480 (3 L ha -1) herbicide and seeding with BRS 232 cultivar. Plots of 5.0 m x 2.5 m were established, plus 1 m of edge between each of them. The cover crop was sown in August, 2006, with 0.15 m of width among rows; the parcels were dried in intervals of one, ten, twenty and thirty days before the soybean seedling. Four treatments were arranged for black oat cover, four for consortium and one control for each cover, all randomized, with five replications. The soybean was seeded in November, 2006, with 0.45 m width among seeding rows. Data as yield, adjusted to 13% of moisture content on cropped seeds; seedling rate; weight of 100 seeds; moisture content and seeds vigor were recorded by the accelerated aging test. All the tests were submitted to an experimental design, with subdivided plots (split plot), completely randomized; the averages were also compared using Scott-Knott test at 5% of probability. The data showed a possible allelopathic interference of cover crops on soybean seed quality. The greatest weight of 100 seeds was obtained when soybean was sown under black oat cover compared to the consortium. On the other hand, when it was sown under consortium, it showed the best vigor, evaluated by the accelerated aging test. The yield did not differ between both covers. The intervals between drying and sowing interfered on weight of 100 seeds and soybean yield. The interval between drying and sowing of one day had a positive effect on weight of 100 seeds, but soybean yield decreased. Hence, it is not well recommended to sow soybean next to the drying management of a cover crop.
Caovilla F.A.,West Parana State University |
Sampaio S.C.,Jardim Universitario |
Smanhotto A.,São Paulo State University |
Nobrega L.H.P.,Jardim Universitario |
And 2 more authors.
Revista Brasileira de Engenharia Agricola e Ambiental | Year: 2010
In this work the distribution was evaluated "in situ" of phosphorus (P), organic matter (MO), potassium (K), calcium (Ca), magnesium (Mg), cation exchange capacity (CEC), aluminum (Al), sum of bases (S), base saturation (V) and pH of a soil cultivated with soybean and irrigated with swine wastewater in the 0, 25, 50 and 75% levels. The factorial scheme was constituted by the 20, 40 and 60 cm soil depths and four wastewater levels with five repetitions. The results showed that significant difference occurred only for P, K and CEC in the soil profile. However, in all parameters, the 60 cm soil depth showed that the concentrations levels are similar to before the aplication of treatments.
Do Nascimento Jr. J.R.A.,Jardim Universitario |
Capelari J.B.,Jardim Universitario |
Vieira L.F.,Jardim Universitario
Revista da Educacao Fisica | Year: 2012
This study investigated the impact of physical activity on the level of stress and life satisfaction of elderly people. The subjects were 187 members of the Open University of Third Age of a city in the northwestern Paraná State. As instruments it was used the Perceived Stress Scale and the Scale for Assessing Attitudes Toward Aging. For data analysis, it was applied Kolmogorov-Smirnov, Mann-Whitney, Spearman correlation, Chi-square and Poisson regression (p < 0.05). The results showed that physically active individuals had higher life satisfaction, and lower level of stress and feelings of loss in comparison to non-practitioners (p = 0.001); the physical activity was associated with all variables (p = 0.001), indicating the impact of the physical activity on stress and life satisfaction. In conclusion, the physical activity is a key element to perceive the stress and the life satisfaction, contributing to a healthy aging.
Brandelero Jr. S.,West Parana State University |
Bonfleur M.L.,West Parana State University |
Ribeiro R.A.,Federal University of Rio de Janeiro |
Vanzela E.C.,University of Campinas |
And 4 more authors.
Archives of Oral Biology | Year: 2012
The prevalence of obesity is increasing globally. There is evidence that the uncontrolled energetic metabolism in obese patients can accelerate periodontal disease. Therefore, the aim of this study was evaluate the possible relationship between hypothalamic obesity induced by neonatal treatment with MSG and experimental periodontal disease. Newborn male Wistar rats received subcutaneous injections in the cervical region, of 4g/Kg/day of body weight (BW) of MSG (MSG group) or hypertonic saline solution, 1.25/kg/day BW (control group, CTL). At 70 days of life periodontal disease was induced in these animals. After they were sacrificed, radiographic analyses of alveolar bone resorption and Tumor Necrosis Factor α (TNFα) gene expression in gingival tissue were performed. The neonatal treatment with MSG did not affect the concentration of plasma glucose and cholesterol (CHOL). However, plasma insulin, non-esterified fatty acids (NEFA) and triglycerides (TG) leves were higher in MSG compared with CTL group. The alveolar bone resorption was 44% lower in MSG-obese rats compared with CTL rats. In the presence of periodontal ligature, there was an increase in this parameter in all groups. The TNFα gene expression, an inflammatory marker, in periodontal tissue was similar in obese and CTL rats. The presence of ligature increased TNFα gene expression in both groups, but in a lower extension in MSG-obese rats. In conclusion these results suggested that hypothalamic obesity may produce a protective effect against periodontal disease, however further research is needed to understand the mechanisms involved in this process. © 2011 Elsevier Ltd.
Barcelos R.E.N.,Jardim Universitario |
Coelho S.R.M.,Jardim Universitario |
Afonso A.D.L.,Jardim Universitario |
de Souza E.G.,Jardim Universitario |
Konopatzki M.R.S.,Jardim Universitario
Revista Caatinga | Year: 2012
The aim of this study is to evaluate the Sitophilus zeamais development in maize seeds, under four lightning systems and to find a mathematical model that describes the growth of this insect under the ambient conditions. Four wood cabinets were built, one of them was a natural light and the other ones as it follow: mixed light, sodium steam light and anti-bugs incandescent light. Inside each chamber, there were 18 recipients containing approximately 250g of seeds infested with 25 weevils. After the chambers building, a timer system was built, so the lamps would stay turned on always on the same time, from 6:00 p.m. to 6:00 a.m. to next day, consequently kept on for 12 hours. Every 21 days after the construction of the experiment 3 recipients from each chamber were taken off and weevils there were counted using the Belese funnel, and the seeds moisture was measured. It was not observed any influence on the bug development, who presented the maximum level of growing 84 days after the storage at all lightning systems tested. The humidity level kept constant itself until the 84 th day and it had reduced significantly, indicating environmental changes during the procedure. The growth of S. zeamais can be described by a polynomial model.
Amaral H.F.,Centro Universitario Filadelfia |
Sena J.O.A.,State University of Maringá |
Andrade D.S.,Instituto Agronomico Do Parana |
Jacome A.G.,Instituto Federal Do Para |
Caldas R.G.,Jardim Universitario
Semina:Ciencias Agrarias | Year: 2012
This aim of this study was to examine the effects of vineyard management and spatial heterogeneity of soil on chemical and microbial variables in comparison with an adjacent forest fragment. In 2000, two field experiments with Vitis labrusca (L.) were set up on an Oxisol of North Paraná, Brazil. In 2004, soil samples were taken to evaluate the following factors: (i) conventional (CONV) and organic (ORG) vineyard management and (ii) spatial heterogeneity of soil, row or inter-rows cultivation and at different sampling depths (0-10 cm and 10-20 cm), in a split-plot arrangement fitted to a randomized complete block with six replicates. The forest adjacent fragment was considered as undisturbed agricultural (or control) area. Chemical attributes of the soil in the ORG vineyard were improved in comparison to the soil in the forest, at a depth of 0-10 cm, with the exception of total carbon. To microbial carbon (Cmic) values the both factors (vineyard management and special soil heterogeneity) contributed to changes in the contents this microbiological soil attributes in the areas evaluated. While, the spatial heterogeneity of the soil was the main factor to changes in soil microbial basal respiration, with higher values in the CONV rows. Regardless of the depth, the lowest qCO2 values were observed in the soil from the ORG vineyard and the forest. The cluster analysis showed that, represented on the Axis-X, the CONV vineyards, ORG vineyards and forest clustered from the negative to the positive, progressively, indicating greater similarity between ORG and forest. Moreover, when the spatial heterogeneity of the soil was plotted on the Axis-Y, the 0-10 cm layer appeared in the positive portion, and the 10-20 cm layer appeared in the negative portion. In the short term, it appears that different vineyard management methods affected microbial variables and some similarity between ORG and forest soil.