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Articles by Paulo Eduardo Teodoro
Total Records ( 10 ) for Paulo Eduardo Teodoro
  Rafael Silva Ferreira , Carlos Antonio da Silva Junior , Paulo Eduardo Teodoro , Patricia Paiva da Silva , Gilcelene Medeiros Arima , Nanci Cappi and Francisco Eduardo Torres
  Several studies have shown satisfactory results of swine manure with biofertilizer on the increased production of grasses such as maize and millet. However, there is little information on the response of grassland to this practice. Thus, the objective of this research was to evaluate four concentrations (0, 50, 100 and 150 m3 ha-1) of swine biofertilizer production of two cultivars of forage Brachiaria brizantha (Marandu and Piatã). The experiment was carried out at the State University of Mato Grosso do Sul, where the soil of the area was classified as dystrophic Ultisol. We used a completely randomized design with four replications in a split plots to measure the following morphogenetic characters: plant height leaf length, leaf width at 15, 30, 45 and 60 Days after Seeding (DAS) and quantity of green matter fresh and dry weight of shoots and roots only at 60 DAS. There was an increasing in parameters as a function of plant age, no differences among cultivars. The swine manure with biofertilizer promoted significant increases in these parameters. Doses of 150, 100 and 50 m3 ha-1 swine biofertilizer did not differ for the variables, fresh and dry matter of green shoots and roots which allows us to infer that the use of biofertilizer adequately supplied the nutritional requirements of this forage conditions this research.
  Carlos Antonio da Silva Junior , Francisco Eduardo Torres , Paulo Eduardo Teodoro , Guilherme Fernando Capristo Silva and Eduardo Souza Silva
  In Pantanal South Matogrossense croplands pasture are around four million hectares, subject to flooding in the period of the waters. However, water deficit can lead to dehydration in the plant, reducing its growth and acceleration of senescence of tissues by decreasing the rate of leaf expansion and consequently showing less height and photosynthesis by reducing the leaf area. The objective of this research was to study the development of different cultivars of Brachiaria brizantha, which best thrives under two types of environments (conventional pasture and vereda-type of Cerrado vegetation formation) in periods of drought and rain. The experimental design was of randomized blocks with four repetitions in each environment in the two periods. Every 15 DAE (days after emergence) was rated the height of tiller, stem diameter and width of the leaf blade. Was employed Kruskal Wallis statistical method = {P (x>X2); (α = 0.05)} and for comparisons between the means obtained from the variables was carried out the Mann-Whitney test the probability 0.05. To cultivate larger values presented to Xaraés height of plant, stem diameter and width of the leaf blade in relation to the cultivars Marandu, Piatã and MG-4. Cultivating MG-4 presented the lower plant height, stem diameter, width of the leaf blade and a smaller thatched elongation in respect of other cultivars. Cultivating Xaraés was which adapted better to the region of the Cerrado-Pantanal ecotone, showing superior results to the other cultivars.
  Paulo Eduardo Teodoro , Carlos Antonio da Silva Junior , Caio Cezar Correa , Larissa Pereira Ribeiro , Elisa Pereira de Oliveira , Miriam Ferreira Lima and Francisco Eduardo Torres
  The objective of this study was to identify the primary and secondary components that are directly or indirectly related to grain yield and this relationship depends on the type of hybrid (single or triple). The maize experiment was conducted in the agricultural year 2011/12, in the State University of Mato Grosso do Sul, with eighteen treatments, consisting of eleven simple hybrids and seven triple hybrids arranged in a randomized block design with four replications. The variables evaluated were plant height and first ear of corn, length and diameter ear, number of rows per ear, number of kernels per row, weight of hundred grains and productivity. The data of simple hybrids and triple hybrids were grouped for comparison by test t at 5% probability. Subsequently, were estimated Pearson correlation coefficients between the parameters evaluated for each genetic class, proceeding the diagnosis of multicollinearity. Then, the correlations between other features and productivity (dependent variable) were split into direct and indirect effects, establishing relations of cause and effect between them. The results show that the relationship between direct and indirect effects on productivity depend on the genetic class. The variable number of grains per row and weight of hundred grains are directly correlated to grain yield and are indirectly influenced through the effects of the length and ear diameter, respectively.
  Carlos Antonio da Silva Junior , Paulo Eduardo Teodoro , Guilherme Fernando Capristo Silva , Larissa Pereira Ribeiro , Flavia Alves da Silva , Caio Cezar Guedes Correa , Roque Apolinario Alves da Luz Junior and Francisco Eduardo Torres
  Determining the genetic variability and correlations between traits of interest for selection in a population is one of the stages in a breeding program. The objectives of this study was to evaluate the potential for genetic improvement of a population composed of twelve commercial soybean genotypes, were estimated genetic and phenotypic descriptors and correlations between morphological traits of the population. The experimental design was used in randomized block design with four replications. The descriptors measured were plant height and first pod insertion, number of pods and ramifications, mass of hundred grains and yield grains. The yield grains presented more genotypic coefficient of variation, ratio b and herdability. This descriptor obtained phenotypic correlations significant positive (p<0.01), with number of pods, ramifications and mass hundred grains, indicating that the selection of plants with larger number of ramifications entailed, therefore, more productive genotypes. The genotype correlations had the same sign and in most cases superior to their corresponding phenotypic correlations values, indicating that the phenotypic expression is decreased compared to environmental influences. Environmental correlations between descriptors with differences in magnitude and sign, in relation to the respective genotype correlations, revealed that the environment favored one character over another and that the genetic and environmental causes of variation have different physiological mechanisms, defaulting the indirect selection.
  Paulo Eduardo Teodoro , Carlos Antonio da Silva Junior , Larissa Pereira Ribeiro , Flavia Alves da Silva , Caio Cesar Guedes Corraa , Angelita dos Santos Zanuncio and Francisco Eduardo Torres
  Green manure brings numerous benefits that promote, essentially, the maintenance and conservation of agro-systems and its implementation is fundamental to Brazilian Cerrado region. In this scenario, the present research aimed to determine the sample size for estimation biomass and productivity of sunn and showy rattlebox. The experiment was installed in the experimental area of the State University of Mato Grosso do Sul-Unit University Aquidauana (UEMS/UUA), located in the Brazilian Cerrado. It were randomly selected 45 plants in the experimental area of each crop to determine Fresh Mass (FM), Dry Mass (DM) and yield (YI), being the measures of central tendency, variability, asymmetry and kurtosis were calculated and checked for normality by Lilliefors’s test. In sunn and showy rattlebox, 340 and 197 plants, respectively, are sufficient for the estimation of evaluated descriptors, with confidence interval of 95%. The species evaluated did not differ for the characters FM and DM, both of which are recommended for cultivation in the Cerrado.
  Elisa Pereira de Oliveira , Daniel Makoto Kusano , Arthur Pacheco , Evandro Michel Valero Nardelli , Ricardo Fernando da Rui , Matheus Gustavo da Silva , Paulo Eduardo Teodoro and Carlos Antonio da Silva Junior
  The objective of this research was to evaluate the residual effect of 2,4-D amine on the initial development of soybean plants after its application on the soil at different times before sowing. The experiment was conducted in a greenhouse during the months from April to June 2013, at State University of Mato Grosso do Sul. The experimental design was completely randomized, with four replications. The treatments consisted of eight application times of herbicide 2,4-D amine, seven (3, 6, 9, 12, 15, 18 and 21 days) before sowing, a treatment during sowing (0) and a control treatment (no herbicide application). The dose used was 1080 g i.a. ha–1. It were evaluated he following variables: percentage of emergency, plant height, stem diameter, fresh mass of shoot, fresh mass of roots, dry mass of shoot, dry mass of roots, nodular activity and toxicity. The soybean sowing at time or three days after application of 2,4-D amine causes reduction in the crop development as a result of this residual effect of this herbicide and should occur at least six days after application of this herbicide.
  Gessi Ceccon , Adriano dos Santos , Paulo Eduardo Teodoro and Carlos Antonio da Silva Junior
  This research aimed to identify the relationships between the primary and secondary components of the maize yield using the techniques of canonical correlation and factors analysis. The base population was composed of nine randomized crossing hybrids in an isolated field, in the years 2006-2012. Canonical correlations were estimated between the variable group consisting of primary (GI) and secondary (GII) yield components. To Factor Analysis (FA), we chose a number of common factors equal to the number of eigen values higher than the existing unit in the phenotypic correlations matrix of variables and the orthogonal factor model was opted. Primary and secondary yield components of maize grains are not independent. Inter-group associations are established by plants with higher height, stem diameter, dry weight and lower ear height, which positively influence primary yield components (dry ear weight, ear length and hundred-grain weight). Factor analysis allowed to reduce a large number of original variables observed to a small number of abstract variables and can be used to complement the canonical variables technique.
  Matheus Langhi Alves , Mariana Conceicao de Souza , Gustavo Henrique Gottardo Loff , Rodrigo Araujo Marques , Paulo Eduardo Teodoro , Caio Cezar Guedes Correa , Carlos Antonio da Silva Junior and Francisco Eduardo Torres
  Models to estimate leaf area according to the linear dimensions of leaves have been developed in several green manure crops. The aim of this work was to model and identify the best models for estimating the leaf area determined by digital photos in sun. The trial was installed in the experimental area of the State University of Mato Grosso do Sul-Unit University Aquidauana (UEMS/UUA), Brazil. During the growth and development of plants, randomly 200 expanded leaves of the lower, middle and superior portions were collected in order to obtain the plant canopy representation. These leaves were separated into two samples; the first with 150 leaves was used to generate mathematical models for measuring the leaf area and the second with 50 leaves was used to validate the generated equations and identify the best accuracy. At each collected leaf was measured the length and width. Subsequently, it was calculated the product of length×width. Then, the real leaf area for all 200 leaves was determined by digital photos. The linear model based on the product between length×width is the most appropriate to estimate sunn leaf area, because it had the highest Pearson linear correlation coefficient, lower mean square error and lower root mean square error.
  Jefferson Luis Anselmo , Paulo Eduardo Teodoro , Carlos Antonio da Silva Junir , Flavia Alves da Silva , Caio Cezar Guedes Correa and Francisco Eduardo Torres
  Background and Objective: Upland cotton is one the main crops of economic importance in Brazil. In the face of such morphological traits, there is the need to search for cotton cultivars that are adapted to the smaller row spacing, as these can be grown in succession to soybean without the need to exchange of the seeder. However, few results encourage this practice by farmers. The aim of this study was to evaluate the agronomic performance of 16 upland cotton cultivars grown in two row spacing in the Brazilian Cerrado region. Methodology: The trial was conducted at Fundação Chapadão, in the municipality of Chapadão do Sul, State of Mato Grosso do Sul, Brazil. Experimental design was sub-divided plots with ten lines each, with four replications. The following agronomic traits were evaluated: Plant height, first reproductive branch height, number of bolls per plant, weight of bolls per plant and cotton yield in seed. Results: There were significant differences (p = 0.05) between cultivars for all evaluated traits. Except for the WB, the others traits were influenced by spacing. There was no interaction between factors for any evaluated traits. Conclusion: Spacing of 0.90 m provides better agronomic performance of cotton cultivars. The cultivars FM975, TMG41 and TMG81 stood out among the others for obtaining the highest cotton yield in seed, alternatives to the growing for farmers from Brazilian Cerrado region.
  Elisa Pereira de Oliveira , Paulo Eduardo Teodoro , Carlos Antonio da Silva Junior , Simone Botelho Benites , Larissa Pereira Ribeiro and Francisco Eduardo Torres
  Objective: The aim of this study was to evaluate the influence of seed type and sampling times in the agricultural year 2011/2012 on the production of Dry Mass (DM) of cultivars of Panicum maximum. Methodology: The experiment was carried out at the Universidade Estadual de Mato Grosso do Sul, Campus Aquidauana-MS. The statistical design was a randomized block in a split plot with four replications. The plots consisted of three cultivars of Panicum maximum: Tanzânia, Mombaça and Massai. The subplots comprised two seed treatments: Conventional seed with high purity and seed encrusted, who went through the process of chiseling, fungicide and subsequently received péleti containing macro and micronutrients. The first cut occurred on 22 October, 2011 the remaining forage cuts were 60 days of regrowth, which it was assessed the following parameters: Dry mass of leaves, culm and roots and leaf/culm ratio (L/C). Results: The seed coating did not affect the production of DM. Mombaça showed greater DM and leaf/culm ratio in relation to Tanzânia and Massai. Conclusion: In the region of Aquidauana-MS, Panicum maximum cultivars showed low forage production during the winter season, characterizing the summer as the best period of forage production for the three cultivars of this species.
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