Biorregulador: influência na germinação, vigor de sementes e na produção de mudas de rúcula

Abstract

The Rocket salad is a leafy vegetable greatly appreciated. The germination capacity and seed vigor are important factors for seedling emergence and seedlings quality. The aim of this study was to determine the effect of the plant growth regulator Stimulate® on seed germination and vigor and rocket seedlings production. The experiment was conducted at the laboratory of seed analyses and Federal University of Pampa Experimental Area, Campus Itaqui, in a completely randomized design with six treatments and four replications. Rocket salad seeds used were Cultivada, Folha Larga and Rokita cultivars. Treatments consisted of doses of 0, 2, 4, 8, 16 and 32 ml Stimulate® L-¹. Effects of treatments on germination and vigor were evaluated by germination test, seedling length and dry mass and seedling production, with assessments at 7, 14, 21 and 28 days after the begging of the test, accounting percentage of emerged seedlings, number of leaves, shoots of seedling height and root length and dry mass of seedlings at 28 days after start of the test. The results were submitted to analysis of variance and when the F test was significant regression analysis was performed. There was no improvement on rocket salad seed germination and vigor treated with Stimulate®. In seedling production, seedling emergence has enhancements in doses ranging from 15,6 to 32 mL L-¹ for Rokita and 26 to 30.5 to cultivar Folha Larga; shoot seedlings height increases by doses ranging from 8 to 24.5 ml L-¹ to Folha Larga cultivar and from 16.8 to 17.6 mL L-¹ for Cultivada cultivar