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| Registros recuperados: 53 | |
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| Corlett,Francisco M.F; Rufino,Cassyo de A; Vieira,Jucilayne F; Tavares,Lizandro C; Tunes,Lilian V.M; Barros,Antonio C.S.A. |
| Seed coating is a process in which a thin and uniform polymer layer is deposited on the surface of a seed. The objective of this study was to evaluate the vigor of barley seed coated with a commercial polymer and various combinations of calcium, silicon and fungicide. In addition to a control with only the polymer coating, a total of 17 seed coating treatments were used in a completely randomized factorial design (18 treatments × 4 replicates per treatment). Calcium and silicon were applied at concentrations of 0, 25 or 50 g kg¹ of seed, and 0 or 3.0 mL of fungicide was applied. The means were compared using a Duncan test (P≤0.05). The results showed that a coating of polymer, fungicide, calcium and silicon did not affect the physiological... |
| Tipo: Journal article |
Palavras-chave: Seed protection; Physiological quality; Seed quality. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100013 |
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| Menezes,Nilson Lemos de; Marchezan,Enio. |
| O presente trabalho teve como objetivos avaliar a qualidade fisiológica e sanitária de sementes de girassol (Helianthus annuus L.), provenientes do Ensaio Regional de Cultivares de Girassol, instalado na área experimental da Universidade Federal de Santa Maria (UFSM), em Santa Maria - RS, nas safras 1984/85 e 1985/86. Foram testados 15 genótipos e duas épocas de colheitas; a primeira quando as sementes atingiram, pela primeira vez, 14 - 13% de umidade e a segunda oito dias após. A qualidade fisiológica das sementes foi avaliada através dos testes de germinação e vigor (envelhecimento acelerado, strictu sensu), peso de mil sementes e conteúdo de matéria seca. O estudo patológico foi feito pelo método de papel de filtro, com congelamento, assepsia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sunflower seeds; Physiological quality; Sanitary quality; Harvest delaying. |
| Ano: 1991 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781991000300003 |
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| Alencar,Karina Margareti de Castilio; Rodrigues,Adriana Paula D'Agostini Contreiras; Pereira,Silvia Rahe; Laura,Valdemir Antônio. |
| It is estimated that 60% of the area of cultivated pasture, in the Brazilian Savannah, is degraded or in process of degradation, due to, among other causes, the lack of nitrogen. The Stylosanthes genus is the legume which has the greater number of cultivars used in tropical pastures, however, its seeds have characteristics which can difficult the formation of an adequate stand of plants on pasture. In this research the aim was to evaluate the effects of priming in the speed and uniformity of the Stylosanthes capitata, S. macrocephala and S. guianensis seeds germination. The seeds were kept for 12, 24, 36 and 48 hours in aired media PEG 6,000 at 0.0, -0.5, -1.0 and -1.5MPa. Afterwards, they were sent to the germination test. The variables analyzed were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forage; Physiological quality; Legume; Priming. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000400008 |
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| Harter,Fabio Schaun; Harter,Leticia dos Santos Holbig; Meneghello,Geri Eduardo. |
| ABSTRACT: In the present study, the objective was to evaluate the production and quality of rice seeds of four cultivars under conditions of saline stress caused by irrigation water. The work was carried out at the EliseuMaciel Agronomy College of the Universidade Federal de Pelotas, with four rice cultivars, IRGA 417, Avaxi CL, Inov CL and IAS 12-9 (Formosa). In the experiment, the following saline concentrations were used: 0; 12.5; 25; 37.5; 50; 75 and 100mM. After completing the crop cycle, the following agronomic characteristics were evaluated in each of the plants: number of panicles, total weight of panicles, percentage of full seeds, percentage of seedlings and weight of a thousand seeds. The physiological quality of the seeds harvested from the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa L.; Saline stress; Physiological quality; Agronomic characteristic.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900250 |
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| Santana,Elza Brandão; Valente,Maria da Conceição da Costa; Corumbá,Lorena Gomes; Andrade,Elisangela Lima; Costa,Cristiane Maria Leal; Faria,Lênio José Guerreiro de. |
| ABSTRACT: Processing of particles in a moving bed, such as a fluidized bed or a spouting bed, is commonly used in the operations of drying, coating, and granulation of particulate systems. This process has applications in the chemical, pharmaceutical and, presently, agronomical industries, especially for seed treatment/coating. This research aimed to analyze the fluid-dynamic behavior of fluidized and spouting beds with different air temperatures and loads of flaxseeds (Linum usitatissimum L.), with estimates of the fluid-dynamic parameters correlated to each process. The parameters were compared with the values obtained from classical correlations in the literature, with indications of associated percentages of deviation. Influence of fluid dynamics on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Linum usitatissimum L.; Dynamic bed; Physiological quality; Germination; Fluid-dynamic parameters. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000207 |
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| Bernardi,Alexandre; Ramos,Alexandre Rogério; Silva,Antonio Waldimir Leopoldino da. |
| ABSTRACT: The use of larger seeds may improve the initial development, plant stand, and mass productivity in forage crops. The present study aimed to evaluate the effect of the size of seeds of Sudan grass (Sorghum sudanense L.), standardized on density, on parameters of physiological quality and crop productivity. Seeds were processed in a gravitational table in order to become uniform in terms of density and then submitted to sieves with apertures of 1.75 or 2.00 mm. Three different treatments (seeds without size classification, seeds with diameter between 1.75 mm and 1.99 mm, and seeds with diameter above 2.00 mm) were compared. This study consisted of a laboratory stage for the analysis of physiological variables of seed, and a stage in field plots... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sieves; Seed processing; Forage yield; Physiological quality. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400653 |
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| Lima,Juliana Joice Pereira; Freitas,Marcella Nunes de; Guimarães,Renato Mendes; Vieira,Antônio Rodrigues; Ávila,Maria Alice Bento. |
| The aim of this study was to adapt the methodology of the accelerated aging and electrical conductivity tests for determination of physiological potential in crambe seeds. Six seed lots of crambe (cv. FMS Brilhante) were subjected to determination of moisture content, germination test, first count germination, emergence, and emergence speed index. For the accelerated aging test, the traditional methodology was used with water, and with a saturated potassium chloride and sodium chloride solution in three periods of exposure (24, 48, and 72 hours) at 41°C; the electrical conductivity test was performed with four pre-soaking treatments (0, 2, 4, and 8 hours) and four soaking periods (4, 8, 16, and 24 hours) at 25°C. The accelerated aging test with water for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crambe abyssinica; Vigor; Physiological quality. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000100007 |
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| Coelho,Stefânia Vilas Boas; Rosa,Sttela Dellyzete Veiga Franco da; Fantazzini,Tatiana Botelho; Baute,Júlia Lima; Silva,Luciano Coutinho. |
| ABSTRACT Coffee is one of the main agricultural commodities in the country, and it is important to conservation of plant material for breeding programs. Cryopreservation is a promising alternative for preserving in the long-term the germplasm of species considered recalcitrant. However, studies should be performed to achieve maximum survival of seedlings after immersion in liquid nitrogen. The objective of this work was to find a cryopreservation protocol for storing seeds of Coffea canephora, studying two methods of cryopreservation, slow and fast cooling. Seeds were subjected to drying in silica gel up to the water content of 0.25 g g-1. In the first experiment, dried seeds were subjected to treatments of slow cooling at speeds of -1 ºC min-1,-3 ºC min-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drying in silica gel; Recalcitrant seeds; Ice crystals; Isoenzymes; Physiological quality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000600588 |
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| Carvalho,Tereza Cristina de; Krzyzanowski,Francisco Carlos; Ohlson,Osvaldo de Castro; Panobianco,Maristela. |
| The tetrazolium test is widely used for seed vigor assessment of various plant species. For wheat, however, there is no methodology specifically recommended. This study aimed at determining an efficient procedure to evaluate vigor of wheat seeds by this test; besides allowing the establishment of seed quality classes. Thus, four different wheat seed lots were assessed by determining the moisture content and through tests of germination, accelerated aging, and field seedling emergence. The following methodologies were assessed: 1) longitudinal bisection of seed, with subsequent placement of the two halves on filter paper moistened with a 1.0% tetrazolium solution, at 30º C, for 2 h; 2) longitudinal bisection, with subsequent immersion of one seed half into... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Physiological quality; Viability. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600002 |
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| Rocha,Debora Kelli; Carvalho,Everson Reis; Pires,Raquel Maria de Oliveira; Santos,Heloisa Oliveira dos; Penido,Amanda Carvalho; Andrade,Dayliane Bernardes de. |
| ABSTRACT The use of an appropriate method that accurately expresses physiological seed quality and minimizes possible phytotoxicity by chemical products in laboratory testing with soybean seeds is relevant. The objective of this work was to evaluate the influence and infer the method adequacy for the representative evaluation of physiological quality of soybean seeds treated with phytosanitary products. Two experiments were carried out in a completely randomized design, with trial 1 in a 9×5 factorial scheme involving nine seed treatments, including fungicides and insecticides, and solutions with five osmotic potentials (0, -0.25, -0.5, -0.75 and -1.0 MPa) for wetting a paper substrate in a germination experiment, with evaluation of the normal seedlings at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seed analysis; Toxicity; Glycine max; Physiological quality; Seed treatment.. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100209 |
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| Grzybowski,Camila Ribeiro de Souza; Silva,Rosemeire Carvalho da; Vieira,Elisa Serra Negra; Panobianco,Maristela. |
| ABSTRACT Vernonanthura discolor is a native species with potential for reclamation of degraded lands, and the manufacture of wood panels. This study has aimed to evaluate the process of maturation and germination of Vernonanthura discolor seeds, determining the harvest time, and conducting the germination test. A periodic monitoring of the reproductive development of sources of Vernonanthura discolor was conducted, located in the municipality of Bocaiúva do Sul, PR, Brazil; and starting from the anthesis, weekly collections of seeds were performed to evaluate the percentage of dry matter, germinating power, and vigor, in order to identify the physiological maturity of the seeds. In the germination test, two combinations of four temperatures (20, 30, 20-30... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physiological quality; Dry matter; Seed harvest. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200164 |
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| Registros recuperados: 53 | |
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