Qualidade fisiológica de sementes de soja submetidas a aplicação de bioestimulantes

Abstract

The vegetal biostimulants, such as algae extract, are being used on a recurring basis in agriculture, due to the benefits they can provide, contributing to the development of plants and to the production of quality seeds. The objective of this work was to evaluate the productivity and quality of soybean (Glycine max L) seeds obtained in different parts of the plant (upper, middle and lower thirds) translated with biostimulants. A 3×3 factorial scheme was carried out. The first factor was composed by the application of biostimulants based on Ascophyllum nodosum algae (C-Weed®), Solieria filiformis (Algo Mel Push® + Algo Mel ProAct®) and witness without application; the second factor was composed by the position of the pods in the plant, of the upper, middle and lower thirds. The application of biostimulants was carried out at the phenological stages V4 and R1. The harvest was carried out manually, in which the separation of the thirds of the plants was carried out. The data was submitted to analysis of variance (ANOVA), and when significant differences were observed, Tukey's test was performed at 5% probability, with the assistance of R Studio® software and the ExpDes statistics package. The use of the algae-based product A. nodosum resulted in increased seedling dry matter weight and also resulted in a lower percentage of not-germinated seeds. The product based on algae Solieria filiformis did not improve any analyzed variable. Regarding the position of the pods, the upper third showed better results in the germination test, higher percentage of vigor and percentage of normal seedlings. The A. nodosum extract showed benefits in some attributes of physiological quality of soybean seeds. The seeds located in the upper third of the plants have higher physiological quality.