Testes laboratoriais para a avaliação do desempenho germinativo no campo de sementes de lotes de soja (Glycine max (L.) Merrill

• Ano de defesa: 2009
• Autor(a) principal: Salum, Juliane Dossi [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Soja; Merrill; Soja - Desempenho germinativo; Emergência em campo; Glycine max; Field emergence
• Link de acesso: http://hdl.handle.net/11449/96801

This research work was carried out on the campi of Jaboticabal, a unit of the Paulista State University (UNESP), Piracicaba, a unit of the University of São Paulo (USP), and Fernandópolis, a unit of the Camilo Castelo Branco University, the three of them localities of the state of São Paulo, Brazil. The objective of this work was the evaluation of some laboratory tests for the analysis of soybean seeds quality as to their efficiency in forecasting seed lots germinative performance in the field. The environmental conditions in Jaboticabal, Piracicaba, and Fernandópolis were within the limits usually found under normal agricultural practice. Nine commercial soybean seed lots were used whose vigor levels previous laboratory tests showed to be high, medium, and low. The laboratory tests were the following: standard germination, germination first count, accelerated aging, electrical conductivity, cold, seedling length according to procedures found in ISTA (1995), seedling length according to procedures found in ABRATES (1999), seedling dry matter and field emergence at the three localities. The results indicate that soybean seed companies have a reasonably high number of laboratory tests among which to choose, all of them yielding highly trustable results. The accelerated aging, the electrical conductivity, and the cold tests would be those of the highest precision. The electrical conductivity test, in addition to being of high precision, was found to be the fastest one. In addition to those, the seed company still has a high number of tests from which to choose. Among them, those in which seedling length is measured were found to be more efficient than those in which seedling dry matter is measured. The seedling length tests have a duration between 128 and 151 hours. The measuring of seedling length according to... (Complete abstract, click electronic access below)