PARÂMETROS FISIOLÓGICOS E ESTIMULANTES PROMOTORES BIOLÓGICOS BASEADOS EM Ascophyllum nodosum (L.) E BIOATIVADOR NA FASE VEGETATIVA DE Helianthusannuus (L.)

Abstract

The sunflower crop (Helianthus annuus L.) has been gaining prominence among the major crops in Brazil. This work aimed to evaluate genetic parameters and three biostimulants and bioactivators on the vegetative parameters of the Multissol sunflower cultivar, combining two applications (seed inoculation and foliar application). The weight of 100 grains, moisture, germination, germination speed index, electrical conductivity, percentage of emergence and emergence speed index were evaluated for genetic data. The morphological parameters were plant length, root length, aerial and root fresh mass, aerial and root dry mass and number of leaves. The Multissol cultivar presents good genetic parameters for cultivation in the Southwest of Goiás, Brazil. The application of 2.5 mL kg seed-1 of biostimulants by inoculation showed positive effects on most of the parameters evaluated.