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| Registros recuperados: 1.635 | |
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| Resende, Osvaldo; UNIR; Corrêa, Paulo César; UFV. |
| Os objetivos do presente trabalho foram estimar e avaliar as curvas de hidratação do feijão (Phaseolus vulgaris L.), ajustar o modelo de Peleg aos valores experimentais e determinar o coeficiente de difusão na hidratação em diversas temperaturas. Foram utilizados grãos de feijão com teor de água inicial de 0,18 (b.s.) submetidos à embebição em água destilada nas temperaturas de 20, 30, 40 e 50°C. O coeficiente de difusão foi determinado pela solução analítica da segunda lei de Fick, considerando a forma geométrica esférica, com e sem a expansão volumétrica dos grãos. Conclui-se que a taxa de absorção de água do feijão aumenta com a elevação da temperatura de embebição, sendo o modelo de Peleg capaz de representar a cinética do fenômeno. A relação entre o... |
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Palavras-chave: 5.00.00.00-4 Ciências Agrárias difusão líquida; Modelos matemáticos; Absorção de água. |
| Ano: 2007 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/387 |
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| Horta, Andrea Carla Skraba; UEM; Santos, Humberto Silva; UEM; Scapim, Carlos Alberto; UEM; Callegari, Osni; UEM. |
| Beet root planting methods and the most appropriated type of trays for the production of beet-root seedlings, Beta vulgaris var. conditiva (Chenopodiaceae) are analyzed. Experiment evaluated characteristics of seedling growth and production. Treatments consisted of direct sowing, bare-root seedlings and seedlings grown on 128, 200 and 288-cell trays. Cells with the smallest substratum volumes showed an inferior performance in number of leaves and dry matter weight of the seedlings' aerial part. However, no effect of the substratum volume was reported in the root development. When all treatments were harvested at the same date, direct sowing resulted in larger total and commercial production. However, when the cycle was prolonged until the plants of each... |
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Palavras-chave: 5.00.00.00-4 Ciências Agrárias Beta vulgaris var. conditiva; Métodos de plantio; Produção de mudas 5.00.00.00-4 Ciências Agrárias. |
| Ano: 2001 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2607 |
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| Pavlu, Franz Arthur; Molin, José Paulo. |
| Sphenophorus levis has become a major pest of sugarcane plantations in Brazil, causing significant losses in productivity. Few studies have been conducted on the spatial distribution of this pest in the field, which is essential for the development of sampling plans. We aimed to characterize the spatial distribution of S. levis in sugarcane, defining a reliable, practical and feasible sampling plan, as well as generating application maps for production areas, allowing for comparison of the consumption of inputs in a conventional system with site-specific application. The study was conducted in areas around Piracicaba, Brazil. First, we conducted sampling to evaluate the best sampling density to characterize the spatial dependence. The results showed that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.03.01.00-4 eostatistics; Site-specific application; Precision agriculture; Entomology; Soil pests; Sugarcane weevil Máquinas e Implementos Agrícolas. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28599 |
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| Mariano, Daiane Cinque; Faria, Rogério Teixeira; Freitas, Paulo Sergio Lourenço de; Lena, Bruno Patias; Johann, Andre Luiz. |
| Generally, standard lysimeters include a lever-load cell scale, which has become expensive compared to new electronic equipment available for experimental purposes. Currently, lysimeters containing weighing bars with up to 4 load cells are economically feasible. This goal of this study was to present the construction and calibration of four weighing lysimeters built using two rectangular tanks, with a surface area of 1.35 m2 (1 m by 1.35 m) and a depth of 1.5 m, loaded on two weighing bars. Each bar had two high accuracy loading cells connected to a junction box and a datalogger by a coaxial cable. Calibration of each... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.03.02.00-0 evapotranspiration; Water balance; Soil water engenharia de água e solo. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19368 |
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| Sá, João Carlos de Moraes; Universidade Estadual de Ponta Grossa; Ferreira, Ademir de Oliveira; Universidade Federal de Santa Maria; Briedis, Clever; Universidade Estadual de Ponta Grossa; Vieira, Ângelo Marcio; Coamo Agroindustrial Cooperativa; Figeuiredo, André Gradowski de; Monsanto do Brasil Ltda.. |
| Em um Latossolo Vermelho argiloso, localizado no município de Ponta Grossa, Estado do Paraná, foi avaliada a extração de nutrientes e a produtividade de genótipos de milho, submetidos a níveis de palha no sistema plantio direto. O delineamento experimental foi o de blocos ao acaso dispostos em parcelas subdivididas com três repetições. A parcela foi constituída por três níveis de palha na superfície do solo (sem palha; 5,0 e 10,0 t ha-1) e a subparcela foi constituída por genótipos de milho (13 genótipos). A ordem do ganho relativo na extração total de nutrientes em relação a 5,0 e 10,0 t ha-1 de palha foi K > P > N, cujos valores foram de 30,4 e 47, |
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Palavras-chave: Ciência Agrárias; Ciência do solo; Nutrição de plantas cobertura do solo; Zea mays; Plantio direto Nutrição de plantas soil cover; Zea mays; No-tillage. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3979 |
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| Alves, Gleina Costa Silva; Barbosa, Victor Hugo Silva; Giband, Marc; Barroso, Paulo Augusto Vianna; Rodrigues, Fabrício; Rocha, Mara Rubia da. |
| Cotton producers worldwide suffer with the losses caused by the presence of phytonematodes. The aim of the present study was to investigate the inheritance of resistance to Meloidogyne incognita race 3 in Gossypium hirsutum variety punctatum accession TX 25. Accessions of Gossypium sp. were obtained from the germplasm bank of Embrapa Cotton. Two experiments were performed in two consecutive years. In the first experiment, a susceptible parental line, FiberMax 966, a resistant parental line, TX 25, and their F1, F2 and backcross generations were tested. In the second experiment, parental lines FiberMax 966 and TX 25, their F2 generation, and genotypes M315 (resistant), LA887 and DeltaOpal (moderately resistant) were tested.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fitossanidade Gossypium hirsutum; Gall nematode; Gene segregation; Nematologia. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32563 |
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| Souza, Cíntia Ribeiro; Sarmento, Renato Almeida; Venzon, Madelaine; dos Santos, Gil Rodrigues; Silveira, Marcela Cristina Agustini C. da; Tschoeke, Paulo Henrique. |
| The objective of this study was to evaluate the impact of oil extract of neem, Azadirachta indica, on the watermelon aphid Aphis gossypii and its natural enemy Cycloneda sanguinea. Toxicity bioassays were conducted with the commercial product DalNeem (1,475 g L-1 azadirachtin) at 0.0037 µg a.i. mL-1, 0.0074 µg a.i. mL-1 and 0.0148 µg a.i. mL-1, Malathion at 1 µg a.i. mL-1 and distilled water as a control treatment. The products were sprayed to watermelon leaf discs, and the insects were exposed to the product residues. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.02.00-1; 5.01.02.02-8 Citrullus lanatus; Azadirachta indica; Coccinellidae; Aphididae Entomologia. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19517 |
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| Cato, Stella Consorte; ESALQ - USP; Terra, Maurilo Monteiro; IAC; Botelho, Renato Vasconcelos; UNICENTRO; Tecchio, Marco Antonio; UNESP; Paioli-Pires, Erasmo José; Unicentro; Carvalho, Cassia Regina Limonta; IAC; Piedade, Sônia Maria Stefano; ESALQ - USP. |
| O experimento foi desenvolvido em 1999/2000, em um vinhedo de ‘Niagara Rosada’, com o objetivo de avaliar o efeito do ácido giberélico e do anelamento de ramos nas características dos cachos de uva em duas safras. Na primeira, os tratamentos consistiram na imersão dos cachos em solução a 0; 10,0; 22,5; 35; 47,5; 60 e 72,5 mg.l-1 de ácido giberélico isoladamente ou em conjunto com o anelamento, aos quinze dias após o pleno florescimento. Na segunda safra, repetiram-se os tratamentos, acrescentando-se as doses de 85 e 97,5 mg.l-1 de ácido giberélico. Analisaram-se o comprimento, largura e massa dos cachos, bagas e engaço, e o diâmetro do pedicelo. O delineamento estatístico foi em blocos ao... |
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Palavras-chave: 5.01.00.00-9 Agronomia Vitis; Videira; Giberelina; Anelamento; Regulador de crescimento; Qualidade de frutos 5.01.00.00-9 Agronomia. |
| Ano: 2005 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2141 |
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| Guimarães, Isaías Porfírio; DoVale, Júlio César; Antônio, Rafaela Priscila; Aragão, Fernando Antônio Souza de; Nunes, Glauber Henrique de Sousa. |
| The aims of this study were to i) identify the influence of the GxE interaction in the selection of inbred lines of melon, and ii) test the efficiency of different indexes in the selection of inbred lines with a higher yield potential and better quality fruit. For these purposes, 98 inbred lines of yellow melon and two commercial controls, Vereda and AF-646, were evaluated in a randomized block design with two replications, at the conditions present in Mossoró and Baraúna. Analyses of the following traits were performed: fruit yield, mean fruit weight, pulp thickness, pulp firmness and soluble solids content. A complex portion of the GxE interaction was predominantly detected for all traits. The recommendation in this case is to promote selection in each... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.03.05-9 Cucumis melo L; Segregant populations; Genetic gains; Inbred lines extraction; Hybrids; Selection indexes Melhoramento Vegetal. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/26045 |
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| Rodarte, Mirian Pereira; Ufla; Dias, Disney Ribeiro; UNILAVRAS - Centro Universitário de Lavras; Vilela, Danielle Marques; Ufla; Schwan, Rosane Freitas; Ufla. |
| One hundred forty-four microorganisms previously isolated from coffee fruit (Coffea Arabica) were grown on casein agar to evaluate their proteolytic activities. Fifty percent of filamentous fungi, 52.5% of bacteria and 2.6% of yeasts were able to secrete proteases. Positive isolates were further examined in liquid culture for their protease activities by hydrolysis of casein at different pH values (5.0, 7.0 and 9.0) at 30 oC. Bacillus megaterium, B. subtilis, Enterobacter agglomerans, Kurthia sp, Pseudomonas paucimobilis and Tatumella ptyseos demonstrated the highest proteolytic activities at pH 9.0. One yeast isolate, Citeromyces matritensis, had a proteolytic activity of 2.40 U at pH 5.0. Aspergillus dimorphicus, A. ochraceus, Fusarium moniliforme, F.... |
| Tipo: Pesquisa de campo; Laboratório |
Palavras-chave: 5.01.02.04-4 microbial enzyme; Protease; Coffee fermentation Microbiologia Agrícola microbial enzyme; Protease; Coffee fermentation. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6734 |
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| Delbem, Flavia Cristina; Progama de Pós-Graduação em Ciência Animal, Universidade Estadual Paulista, Campus de Araçatuba; Scabora, Márcia Helena; Programa de Pós-Graduação em Produção Vegetal, Universidade Estadual Paulista, Campus de Ilha Solteira; Soares Filho, Cecílio Viega; Universidade Estadual Paulista, Campus de Araçatuba; Heinrichs, Reges; Universidade Estadual Paulista, Campus de Dracena; Ferrari, Tiago Augusto; Progama de Pós-Graduação em Ciência Animal, Universidade Estadual Paulista, Campus de Araçatuba; Cassiolato, Ana Maria Rodrigues; UNESP, Ilha Solteira. |
| The feasibility and increase in the production of new cultivars can be obtained with the practice of nitrogen fertilization. The objective of this study was to verify the effect of sources and levels of nitrogen fertilization, concerning the depths, on the percentage of mycorrhizal colonization and soil fertility when covered by Brachiaria brizantha cv. Xaraés. A randomized blocks design was used and the treatments were under a 3 x 4 factorial scheme, regarding three nitrogen sources (urea, ammonium sulfate, and ajifer-L40) and 4 nitrogen levels (0, 100, 200 and 400 kg ha-1), studied at 2 different depths (0-0.10 and 0.10-0.20 m), with 3 replications. In each plot, the soil samples, composed of 5 simple samples, were... |
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Palavras-chave: 5.01.01.04-8 Ajifer; Sulfato de amônio; Ureia; Pastagem Microbiologia e Bioquímica do Solo Ajifer; Ammonium sulfate; Urea; Pasture. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4002 |
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| Silva, Vanessa Quitete Ribeiro da; Universidade Estadual do Norte Fluminense; Amaral Júnior, Antonio Teixeira do; Universidade Estadual do Norte Fluminense; Gonçalves, Leandro Simões Azeredo; Universidade Estadual do Norte Fluminense; Freitas Júnior, Silvério de Paiva; Universidade Estadual do Norte Fluminense; Ribeiro, Rodrigo Moreira; Universidade Estadual do Norte Fluminense. |
| We examined the heterotic parameterizations of diallel crosses among 10 popcorn inbred lines in two different environments (municipalities of Campos dos Goytacazes and Itaocara, Rio de Janeiro State) and originating from tropical, temperate and subtropical germoplasm. Traits, including grain yield (GY), plant height (PH), ear height (EH), days to silking (FL) and popping expansion (PE), were measured. The inbred lines and the hybrids were evaluated in a randomized complete block design with three replications. The sources of genotypic variation, inbred lines and heterosis had significant effects on all traits. When the sources of heterotic variation were compared separately, estimated mean heterosis was found to be significant for all traits. When inbred... |
| Tipo: Pesquisa Empírica de Campo |
Palavras-chave: 5.02.01.03-4; Zea mays L.; Diallel crosses; Yield and popping expansion 5.02.01.03-4 Zea mays L.; Diallel crosses; Yield and popping expansion. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/9607 |
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| Registros recuperados: 1.635 | |
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