Desempenho de plantas de soja em função do vigor das sementes e do estresse hídrico em Balsas/MA

• Ano de defesa: 2013
• Autor(a) principal: Rodrigues, Denilson da Silva
• Orientador(a): Schuch, Luis Osmar Braga
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Pelotas
• Programa de Pós-Graduação: Programa de Pós-Graduação em Ciência e Tecnologia de Sementes
• Departamento: Faculdade de Agronomia Eliseu Maciel
• País: BR
• Palavras-chave em Português: Sementes; Soja; Glycine max; Produtividade; Desempenho de plantas; Qualidade fisiológica
• Palavras-chave em Inglês: Seeds; Soybean; Glycine max; Productivity; Plant performance; Physiological quality
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
• Link de acesso: http://repositorio.ufpel.edu.br/handle/ri/1402

This work aimed to evaluate the components of soybean yield from different levels of vigor determined by the method of accelerated aging in an official laboratory of seed analysis, in two sowing seasons, the first one being after the first rains, so that the field passed through a period of hydric stress, and the second after the rains have stabilized and there was hydric sufficiency. An experiment was conducted where two batches of high vigor were used, one with a 96% of viability and 92% of vigor and the other with 96% of viability and 91% of vigor. It was also used two batches of middle vigor, one of 91% of viability and 70% of vigor, and the other of 92% of viability and 71% of vigor. We evaluated the following variables: plants per linear meter, plant height, number of seeds per pod, seed number per plant, thousand seed weight and the yield. It was concluded that plants from high vigor seeds showed better performance in all variable component of the yield, except in the thousand seed weight, which was worse, and the use of soybean seeds of middle vigor cause further reduction in yield occurs when more environmental stress.