Emergência de plântulas de abóbora e de trigo a partir da avaliação da qualidade das sementes

Detalhes bibliográficos
Ano de defesa: 2010
Autor(a) principal: Boligon, Alexandra Augusti
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Santa Maria
BR
Agronomia
UFSM
Programa de Pós-Graduação em Agronomia
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://repositorio.ufsm.br/handle/1/3188
Resumo: The great quantity of vigor tests difficult the determination of the estimators of the seedlings emergency of each culture. The aim of the study is to identify the wheat and squash seeds analysis variables that best predict the plants emergency of this cultures. The word was carried out of the Crop Science Departament, in the Federal University of Santa Maria. It was utilized wheat seeds of CEP 30 cultivar and, for the squash seeds of the Caserta, De Tronco, Caravela and Menina Braisleira cultivars.. It was determined for both the cultures, the percentage of normal seedlings in the germination test, first counting of germination, accelerated aging test, cold test without soil and emergency (at 7th and 15th days of the wheat and 21th days of the squash), root length, total plant length and root dry mass. The germination speed index and the aerial part length were determined for the wheat seeds and the sub optimal temperature test, emergence speed index, hypocotyl dry mass, total dry mass, hypocotyls length e hypocotyls length at the emergency for squash seeds.. The seedlings variables had been analyzed through the path analysis and the tests variable through the stepwise multiple regression, considering the seedlings emergency as dependent variable. The data had been submitted also to the factors analysis. The percentage of wheat normal seedlings obtained through the accelerated aging test was the adequate variable for to predict the wheat seedlings emergency, in the sub lots of the low and high physiologic quality. For the squash culture, the percentage of normal seedlings obtained in the sub optimal temperature test was the adequate variable for to predict the squash seedlings emergency, of the four cultivars available.