Action of bioactividor and bio-stimulator in the germination of seeds and vigor of peanut seedlings

Abstract

The adoption of techniques that promote higher germination rates and physiological quality of seeds is essential to increase the productive potential of plants in the field. In this context, the use of bioactivating and biostimulating substances is an alternative for the optimization of seed germination and seedling vigor. Thus, the objective was to evaluate the germination of seeds and the vigor of peanut seedlings, after direct application of the bioactivator Fertiactyl® LEG and the biostimulant Stimulate®. The experiment was completely randomized, with three replications, with treatments arranged in a factorial scheme [(2 x 4) + 2]. The seeds were treated by direct application of Fertiactyl® LEG and Stimulate®, with the following treatments: T1 (4.0), T2 (8.0), T3 (12.0), T4 (16.0) mL of Fertiactyl® kg^-1 seeds, T5 (6.0), T6 (12.0), T7 (18.0), T8 (24.0) mL of Stimulate® kg^-1 seeds, T9 - absolute control (TAB) , T10 (5 mL of water kg^-1 seeds). Then, the seeds were distributed on germination paper and kept in a germinator, at a temperature of 27ºC ± 3º and a photoperiod of 12 hours. Seedling vigor test was carried out simultaneously with the standard seed germination test, as well as the study of the speed index and percentage of seedling emergence in sand, which were recorded daily through direct seedling counting. Data were subjected to analysis of variance and averages by regression analysis to assess the effect of product doses. Fertiactyl® LEG promotes a higher percentage of germination up to a dose of 12.0 mL of Fertiactyl® kg^-1 seeds. Meanwhile, Stimulate® increases seedling vigor, with higher values "‹"‹of total length, total dry matter mass and seedling emergence speed index.