Fitotecnia - Artigos
URI permanente para esta coleçãohttps://locus.ufv.br/handle/123456789/11742
Coleção de Artigos publicados por Docentes, Técnicos e Discentes vinculados ao departamento de Fitotecnia da UFV.
Navegar
4 resultados
Resultados da Pesquisa
Item Physiological quality of dynamically cooled and stored soybean seeds(Journal of Seed Science, 2013) Zuchi, Jacson; França-Neto, José de Barros; Sediyama, Carlos Sigueyuki; Lacerda Filho, Adílio Flauzino de; Reis, Múcio SilvaStorage is an important step in the production of soybean seeds, mainly in tropical regions, where high temperatures can drastically reduce seed quality. The storage at cooler temperatures may be a feasible alternative to preserve seed quality during storage. The objective of this study was to evaluate the physiological quality of soybean seeds artificially cooled by a dynamic process and stored in an environment, with non controlled temperature and relativity humidity. Two seed lots of cultivars Monsoy 8757, TMG 115 RR and BRS Valiosa RR were used. After processing and during packaging the seeds were cooled to 18 oC by a dynamic process. Seed samples were collected after 0, 60 and 120 days of storage, using the following parameters germination, accelerated aging, seedling emergence in sand, speed of emergence index, electrical conductivity, tetrazolium and seed health. Although soybean seeds artificially cooled by the dynamic method may have slightly superior performance in maintaining physiological quality during storage in non-refrigerated warehouse, for lots of high physiological quality, these advantages are not observed.Item Physiological quality of soybean seeds of cultivars submitted to harvesting delay and its association with seedling emergence in the field(Journal of Seed Science, 2013) Reis, Múcio Silva; Dias, Luiz Antônio dos Santos; Araújo, Eduardo Fontes; Sediyama, Tuneo; Sediyama, Camilla Atsumi; Diniz, Fábio OliveiraWith the aim of studying the relationship between the physiological quality of soybean seeds submitted to three harvest times and seedling emergence in the field, seeds of cultivars UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia and Celeste were harvested at stages R8, R8+15 and R8+30 days. The following tests were performed: accelerated aging, electrical conductivity, emergence in sand, emergence speed index and seedling emergence in the field. Germination and vigor were reduced in seeds harvested at 30 days after stage R8 in all the tests, except for the accelerated aging test, which showed a decline in vigor seeds harvested with a delay of 15 days. Seeds of cultivars UFV-16, Confiança and Garantia showed lower physiological quality in most tests, while the seeds of cultivar Celeste had higher physiological quality than the others. There was similarity between the test results of seed quality and seedling emergence in the field.Item Incidence of pathogens and field emergence of soybean seeds subjected to harvest delay(Journal of Seed Science, 2013) Reis, Múcio Silva; Araújo, Eduardo Fontes; Dias, Luiz Antônio dos Santos; Sediyama, Tuneo; Sediyama-Bhering, Camilla Atsumi Zanuncio; Diniz, Fábio OliveiraThis study aimed at evaluating seed health quality, as well as seedling emergence in the field, of eight soybean cultivars (UFV-16, Splendor, Vencedora, Confiança, UFV-18, UFV-TN 105, Garantia, and Celeste) subjected to different harvest periods. To this, seeds were harvested at the growth stages R8, R8+15 days, and R8+30 days, and then submitted to health test and to the test of seedling emergence in field. Results showed that although seeds harvested at 15 and 30 days after the stage R8 had shown a significant increase of fungi infection, especially by Fusarium spp., Phomopsis spp., and Epicoccum spp., the percent seedling emergence in the field was reduced only to seeds harvested 30 days after the reproductive stage R8. Cultivars have shown differentiated behavior between each other in relation to the percent incidence rate of fungi and seedling emergence in the field; and the seeds least infected by fungi were those allowing the highest percent emergence of seedlings in the field.Item Adaptabilidade e estabilidade de genotipos de soja avaliados no estado do Mato Grosso(Revista Ceres, 2010-03) Barros, Hélio Bandeira; Sediyama, Tuneo; Teixeira, Rita de Cássia; Fidelis, Rodrigo Ribeiro; Cruz, Cosme Damião; Reis, Múcio SilvaEste trabalho teve o objetivo de avaliar o desempenho, a estabilidade e a adaptabilidade de 20 genótipos de soja [Glycine max (L.) Merrill], em seis ambientes no Estado do Mato Grosso. O delineamento experimental foi blocos ao acaso, com três repetições. Os ensaios foram conduzidos nos anos agrícolas de 2004/05 e 2005/06 nos municípios de Rondonópolis, Campo Verde e Vera. Para avaliação da adaptabilidade e estabilidade, utilizaram-se os métodos de Lin & Binns (1988) modificado por Carneiro (1998) e Centróide (Rocha et al., 2005). A produtividade média de grãos variou de 2.372 kg.ha-1 (Rondonópolis IV) a 3.539 kg.ha-1 (Vera), com média geral dos ambientes de 2.994 kg.ha-1. Em ambas as metodologias, as linhagens BCR 02 57, BCR 02 25, e BCR 02 20 e os cultivares Tabarana e SL 88102 foram classificados como os mais produtivos, adaptados e estáveis, havendo, portanto, coerência entre tais metodologias. Foram recomendadas as linhagens de soja BCR 02 57, e BCR 02 25, BCR 02 20 para amplas condições ambientais, tendo em vista a produtividade de grãos superior.