Obtenção de mudas de diferentes tratamentos pré-germinativos em sementes de ervilha
DOI:
https://doi.org/10.18041/1900-3803/entramado.1.11944Palavras-chave:
Cobertura plástica, Estratificação de sementes, Giberelinas, Leguminosas, GerminaçãoResumo
O cultivo de ervilha é importante para a economia local na agricultura camponesa. Porém, o processo de obtenção de mudas apresenta baixa uniformidade tanto na germinação quanto no tamanho, o que dificulta o agendamento das tarefas de cultivo na produção. Foi avaliado o efeito de diferentes tratamentos pré-germinativos como refrigeração, cobertura e diferentes concentrações de giberelina na germinação e obtenção de mudas de ervilha. Foi utilizado o delineamento inteiramente casualizado, cujo critério de classificação foi a cobertura da bandeja de germinação (com ou sem cobertura plástica preta calibre 2). Cada bloco teve quatro tratamentos, que são a combinação de dois fatores, temperatura de armazenamento das sementes (com dois níveis 4 ou 16 °C antes da semeadura) e giberelinas (0 ou 100 mg.L-1). A utilização da cobertura plástica preta na bandeja de germinação e a imersão das sementes antes da semeadura em 100 mg.L-1 mostraram a porcentagem de germinação, o potencial de germinação e o tempo médio de germinação (TMG) nas sementes de ervilha var. Santa Isabel. O resfriamento das sementes a 4 °C antes da semeadura aumentou a porcentagem de germinação e reduziu o TMG. A cobertura plástica, refrigeração a 4°C e imersão em 100 mg.L-1 de giberelinas aumentaram a massa fresca e seca dos colmos, e a altura das mudas, porém, a refrigeração a 4°C, sem giberelinas, e sem cobertura, gerou os maiores valores de massa seca e fresca de raízes e folhas.
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