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| Trintinalha, Marcos Antonio; Gonçalves, Antônio Carlos Andrade; Tormena, Cassio Antonio; Costa, Antonio Carlos Saraiva da; Folegatti, Marcos Vinicius; Freitas, Paulo Sergio Lourenço de; Rezende, Roberto. |
| TDR technique has been intensively applied around the world to measure volumetric soil water content. Although its good results, this system is rather expensive. Other systems have been developed to measure soil dielectric constant or electric potential under lower cost conditions. ECHO system has been used on some soil conditions with good results. For tropical soils conditions, there is no investigation about its application. This work was carried out to evaluate TDR and ECHO applications on a tropical soil Typic Paleudalf, which presents 73% of clay, commonly found at the Northeast region of Paraná, Brazil, and on a “washed sand” material. Mathematic models were fit, by linear regression analyses, to describe relations between soil volumetric water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.00.00.00-4 Ciências Agrárias TDR; Umidade do solo; ECHO; Calibração 5.00.00.00-4 Ciências Agrárias. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1841 |
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| Wenneck, Gustavo Soares; Saath, Reni; Araujo, Larissa Leite de; Pereira, Gustavo Lopes; Rezende, Roberto; Wenneck, Guilherme Soares. |
| Crop biomass plays an important role, especially in tropical and subtropical crops that adopt the no-tillage system, whose decomposition is related to material composition and environmental conditions. The objective of this work was to analyze the decomposition of straw remaining from autumn/winter crops in the development of soybean in succession in the Midwest region of Paraná. The experiment was conducted between 2019 and 2021 in a completely randomized design, with eight treatments (spontaneous, black oat, brachiaria, corn, wheat, oilseed radish, corn + brachiaria, and black oat + oilseed radish) and four replications. After autumn/winter cultivation, biomass samples were dried and placed in nylon bags, returning to the original plot during soybean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Land cover; Organic matter; No-tillage system; Cobertura de solo; Matéria orgânica; Sistema plantio direto. |
| Ano: 2021 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6534 |
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| Dallacort, Rivanildo; Freitas, Paulo Sergio Lourenço de; Gonçalves, Antonio Carlos Andrade; Rezende, Roberto; Bertonha, Altair; Silva, Frederico Fonseca da; Trintinalha, Marcos. |
| This work aimed at adjusting the Angstron’s equation coefficients, on monthly and annual basis, to the region of Palotina (24º17'S, 53º50'30'' W and 333m of altitude), Paraná, Brazil. The purpose was to determine the global solar radiation on a daily basis. Climatic data of global solar radiation and total daily sunshine, from 1982 to 2002 were used to fit the equation. Lower values (7,82MJ m-2) of global solar radiation were verified at months with north solar declination and higher values (22,07MJ m-2) at months with south solar declination, with annual mean value of 14,27MJ m-2. The radiation that reached the atmosphere top presented similar annual trend, with a lowest value of 21,58MJ m-2 on June 24th and highest value of 44,51MJ m-2 on January 1st.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.00.00.00-4 Ciências Agrárias Angstron; Coeficientes da equação; Irradiação solar global; Insolação 5.00.00.00-4 Ciências Agrárias. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1831 |
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| Lorenzoni, Marcelo Zolin; Rezende, Roberto; Souza, Alvaro Henrique Cândido de; Seron, Cassio de Castro; Gonçalves, Antônio Carlos Andrade; Saath, Reni. |
| This study aimed to evaluate the benefits of irrigation with magnetically-treated water and replacement depths based on ETc, in plant growth and development of bell pepper grown in a protected environment in two cultivation seasons. The experiment was carried out in a protected environment, in the Centro Técnico de Irrigação (CTI), at Universidade Estadual de Maringá (UEM), in Maringá - PR. Two experiments were performed: summer (2017-2018) and winter-spring (2018). The experimental design adopted was randomized blocks in factorial scheme 3 x 2 (six treatments) with four replications in the summer season and 2 x 2 (four treatments) with six replications in the winter-spring season. The first factor consisted of water replacement depths (50, 75 and 100% of... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2020 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/4173 |
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| Seron, Cássio de Castro; Rezende, Roberto; Lorenzoni, Marcelo Zolin; Souza, Álvaro Henrique Candido de; Gonçalves, Antonio Carlos Andrade; Saath, Reni. |
| The work aimed to evaluate the effect of irrigation with magnetically treated water on development, growth, and yield of the scarlet eggplant (Solanum gilo Raddi) cv. Morro Grande, in two growing seasons (autumn and spring). A completely randomized design in a 3x2 factorial scheme with three replications for the first growing season and 2x2 with five replications for the second growing season was used. Each experimental unit consisted of four plants spaced 0.75 m between plants and 1.00 m between rows. Factors consisted of irrigation using magnetically treated water, untreated water, three replacement of the crop evapotranspiration (50%, 75%, and 100% ETc) for the first growing season and two replacement of the crop evapotranspiration (75% and 100% ETc)... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2019 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/3809 |
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| Souza, Renan Soares de; Rezende, Roberto; Hachmann, Tiago Luan; Lozano, Cláudia Salim; Andrian, André Felipe Barion Alves; Freitas, Paulo Sérgio Lourenço de. |
| The objective of this study was to evaluate the effect of nitrogen and potassium silicate on the productive and commercial aspects of curly lettuce, Vera cultivar. The experimental design was completely randomized (CRD), with ten treatments and three replications. The treatments, arranged in a factorial design according to the Plan Puebla III matrix (Turrent & Laird, 1975), consisted of the combination of five doses of nitrogen (9; 54; 90; 126 and 171 kg ha-1) and five doses of potassium silicate (1.15; 6.90; 11.50; 16.10 and 21.85 kg ha-1). A control treatment without application of nitrogen and potassium silicate was also inserted. The crop was grown in a greenhouse and the doses were applied as sidedressing using drip micro-irrigation system. Total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.03.00-8 Lactuca sativa L. protected cultivation micro drip irrigation silicon. Fitotecnia; Fertirrigação Lactuca sativa L.; Protected cultivation; Micro drip irrigation; Silicon.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32897 |
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| Lorenzoni, Marcelo Zolin; Rezende, Roberto; Seron, Cássio de Castro; Souza, Álvaro Henrique Cândido de. |
| The application of magnetically treated water is a valuable technique for crop irrigation to enhance the yield and quality of agricultural products. This study aims to evaluate the effect of irrigation water depths and the application of water with and without magnetic treatment on the yield and quality of bell pepper fruits in a controlled environment, verifying the effect of magnetically treated water on soil water retention. Two experiments were conducted in the Irrigation Technical Center of the Universidade Estadual de Maringá, Maringá/PR; the first on Summer 2017-2018, and the second on Winter-Spring 2018. A randomized block design with a factorial scheme 3 x 2 with four repetitions was used for the first experiment and a 2 x 2 scheme with six... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2021 |
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6153 |
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