Fósforo na qualidade de sementes de soja e consequente desempenho na produção de grãos

• Autor(a) principal: Marin, Rosidelma da Silva Felicio
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFPel - Guaiaca
• Texto Completo: http://repositorio.ufpel.edu.br/handle/ri/1369
• topic: Glycine max; Fósforo; Qualidade fisiológica de sementes; Produtividade; Glycine max; Phosphorus; Physiological quality off seeds; Yield; CNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOS

The objective of this study was to evaluate the effect of application different doses of phosphorus in the seed quality and productivity in the next generation. The experiment was conducted in Itiquira, MT, during the harvest 2009/2010 and 2010/2011. In the season 2009/2010, soybean seeds were sown under different doses of phosphorus in the line from the chemical analysis of soil, in the following proportions in accordance with the recommendation: control - 50%, 100%, 150%, 200% of the recommended dose P2O5. Its was used triple superphosphate as phosphorus source. Fertilization with 100 kg/ha of potassium chloride was distributed broadcast post-emergence. After harvesting, it s was analyzed viability and vigor, and yield components as insertion height of the first pod, number of pods per plant, number of seeds per plant, number of plants per meter, yield and mineral in the seed. Part of the seed was stored with 13% humidity under controlled temperature between 20° and 22°C. In 2010/2011, harvesting the seeds from each treatment for 2009/2010 crop were sown in the field, receiving fertilizer as soil analysis. The floor area for each treatment was 270 m². After the harvesting treatments in the second year, it was evaluated the yield. The experimental design was from blocks at random with five replicates. The average were submitted to analysis of variance. Subsequently subjected to Dunnett's test and polynomial regression. The seeds with higher phosphorus levels influence positively the number of seeds and pods per plant, contributing to the increase of soybean yield. Higher phosphorus concentrations in the line of sowing improve soybean seeds vigor, also they contribute to the increase of phosphorus, iron and zinc of seeds produced, however, manganese concentrations are reduced.