Bioestimulantes no desenvolvimento inicial de milho

Abstract

Brazil is the third largest corn producer in the world, and this cereal is the third most cultivated in the world. In this way, numerous technologies are created for the culture, with the purpose of increasing the productivity and final quality of the product. One of the technologies present on the market are biostimulants, which are plant and/or synthetic growth regulators, which enhance the development of the crop. The present work aimed to evaluate the effect of commercial biostimulants on the initial development of maize, cultivar Morgan 607 PWU. The work was carried out in a greenhouse, located on the Campus Glória of the Federal University of Uberlândia - UFU. The design used was in randomized blocks, composed of 8 treatments, using a combination of Stimulate in seed treatment, Phylgreen Gemma in seed treatment and Stimulate applied via foliar application, in addition to the control, involving four replications. To carry out the experiment, 32 pots with a capacity of 8 dm-3 of soil were used, which were exposed to chemical fertilization 32 Kg ha-1 of N, 112 Kg ha-1 of P2O5 and 64 Kg ha-1 of K2O before the sowing. The implantation took place on October 27, 2022, in which ten seeds were sown per pot at three centimeters deep and after fifteen days of emergence, six plants were thinned, leaving four plants in each pot to be expected as expected. In the period of 15 days after emergence, the first evaluation of fresh shoot mass, dry shoot mass, fresh root system mass, dry root system mass, plant height and stem diameter of the plants was carried out. The application of Stimulate foliar was performed right after the first evaluation, estimating plant height and stem diameter at 0, 4, 7, 10 and 14 days after application. After 30 days after emergence, a second evaluation of fresh shoot mass, dry shoot mass, fresh root system mass, dry root system mass was performed. It is concluded that: in the establishment of plants, the Phylgreen Gemma applied in the treatment of corn seeds presents better performance than the non-use, considering the mass production of the dry aerial part; the application of Stimulate and Phylgreen Gemma in the treatment of seeds associated with the application of Stimulate foliar presents an unexpected better response to witness, considering the mass production of the dry aerial part, in the development of the plants; the use of Stimulate and Phylgreen Gemma in seed treatment, associated or not with Stimulate via the foliar route, does not contribute to an increase in mass of the root system, plant height and stem diameter.