Propriedades fisiológicas e físico-químicas durante armazenamento de soja e milho com diferentes tecnologias de semente

• Autor(a) principal: Prado, Priscylla Martins Carrijo
• Data de Publicação: 2020
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/10839
• topic: Composição centesimal; Glycine max (L. Merr); Pós colheita; Vigor; Zea mays (L.); Centesimal composition; Glycine max (L.); Merril; Postharvest; Vigor; Zea mays (L.); CIENCIAS AGRARIAS::AGRONOMIA

Soy and corn, as they are of great importance in the Brazilian economy, are genetically improved (transgenic) in order to facilitate crop management and provide greater yields for the producer. However, post-harvest information on these technologies is still scarce, since transgenic seeds have been showing a significant decrease in their quality during storage, compared to conventional cultivars. Based on this information, the objective of this research was to evaluate changes in the physiological and physical chemical properties of soybean and corn seeds during storage under controlled conditions (temperature of 12 ° C ± 2 and relative humidity of 70% ± 5) and without control (environmental conditions). Periodic analyzes of germination, tetrazolium, electrical conductivity, humidity, ash, lipids, protein, pH, acidity, water and color activity were carried out during 360 days. The storage time and condition caused changes in most of the physicochemical characteristics and in all the physiological properties evaluated of the soybean seeds of cultivars NS 7780 IPRO, BRS 284, Desafio RR and corn of cultivars 30S31, 30S31 VYHR and AG 5055 PRO. The environmental conditions in which the seeds were submitted preserved the germination of the soybean cultivar NS 7780 IPRO and of the corn cultivars 30S31 VYHR and AG 5055 PRO for only 90 days; BRS 284 and Desafio RR cultivars for 180 days; and the conventional corn cultivar (30S31) was not affected during the 360 days of storage. Under controlled conditions, the physiological properties of the soybean cultivar NS 7780 IPRO, the viability and germination of the soybean cultivar Desafio RR and the corn cultivars 30S31 and AG 5055 PRO were maintained throughout storage. But the viability of the seeds of the soybean cultivars BRS 284 and corn AG 5055 PRO and the vigor of the soybean cultivar Desafio RR were preserved for 180 days, the germination of the seeds of the corn cultivar 30S31 VYHR was maintained for 270 days; while the other physiological properties remained below that required for commercialization since 90 days.