DOSES DE BIOESTIMULANTE NA QUALIDADE FISIOLÓGICA DE SEMENTES DE MILHO

Abstract

Corn is very susceptible to the occurrence of abiotic and biotic factors in the field, which can interfere with the germination, establishment and development of the crop. Therefore, there are technologies that seek to help the plant in an attempt to mitigate these factors, favoring the development of the root system and aerial part, as well as accelerating germination. In this sense, biostimulants with algae extract act as stress relievers and provide adaptive advantages, especially in the early stages of development. Thus, the objective of this work was to evaluate the effect of different doses of the biostimulant based on algae extract on the germination and vigor of corn seedlings. of corn seeds. For this, the experiment was conducted at the Instituto Federal Goiano Campus Posse in the Sample Preparation laboratory. The seeds of hybrid corn cultivar NS 73 VIP3 were subjected to treatment with a biostimulant, which has in its composition: 40% total amino acids, 10% Ecklonia Maxima algae extract, 10% salicylic compounds, 0.005% auxin, 0.009% cytokinin and 0.005% gibberellin; at doses: 20 µl/g, 59 µl/g and 98 µl/g and a control, which was the absence of the product. The design was completely randomized with four treatments comprising the control, underdose, ideal dose and overdose with four replications. The acquired data were subjected to qualitatively described averages. The variables evaluated were: germination potential, vigor and emergence speed, length of the shoot and root, dry mass of the shoot and dry mass of the roots of the seedlings. Treatments with extract-based biostimulant showed lower averages for the variables aerial and root length, aerial part dry matter, emergence speed index and vigor. The biostimulant did not provide higher germination averages. In view of the work carried out, the importance of studying different doses to avoid initial damage in the establishment of corn crops is evident.