Effect of vegetal regulators on sprinkler-irrigated highland rice - DOI: 10.4025/actasciagron.v29i2.258

Abstract

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.