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Aplicação de reguladores vegetais na cultura de arroz de terras altas

2007; Editora da Universidade Estadual de Maringá (Eduem); Volume: 29; Issue: 2 Linguagem: Inglês

10.4025/actasciagron.v29i2.258

1807-8621

Rita de Cássia Félix Alvarez, Carlos Alexandre Costa Crusciol, João Domingos Rodrigues, Angela Cristina Camarim Alvarez,

Silicon Effects in Agriculture

The present work aims to identify the vegetal regulators and optimum dose to reduce plant height and layering and their influence on production and productivity components in sprinkler-irrigated highland rice grains. Treatments consisted of three vegetal regulators and four doses. Mepiquat chloride (Pix) and ethyl-trinexapac (Moddus) were applied at doses of 0, 2000, 4000 and 8000 mg L-1, while paclobutrazol (Paclobutrazol) was applied at 0, 1000, 2000 and 4000 mg L-1, commercial product. The vegetal regulators were applied during the profiling state, utilizing Primavera cultivar. Results showed that ethyl-trinexapac reduced the plant height and influenced negatively grain production and productivity components. No optimum dose was identified to reduce plant height and increase grain productivity.