Bioestimulantes no tratamento de sementes de milho

Abstract

The objective of the present work was to evaluate the biostimulating effect of several commercial products on the initial development of the maize crop, using two evaluation methodologies. The work was conducted out at the Technical School of Poxoréu, a unit of the State Secretariat of Science and Technology (SECITEC) in Mato Grosso. Seeds of hybrid maize P3431H. In the methodology 1, the commercial products Awaken, Orgamon, Stimulate, Fortseed, Nicomo, and Improver were used, where the treatments consisted of the different doses: 0; 0.5; 1; 2 and 4 times the commercially recommended dose of the product. The doses were obtained by dilution in water to form a solution with a total volume of 300 mL. The maize seeds were immersed in the solution for a period of six hours. After that time, six corn seeds were sown in 2 dm3 volume vessels containing washed sand. After sowing, the solution that was not absorbed by the seeds was divided and evenly distributed in the pots where sowing was carried out. In Method 2 (without solution reuse) three experiments were carried out, using the commercial products Orgamon, Stimulate and NiCoMo. Similar to methodology 1, except for the non-reuse of the solution that remained after the period of imbibition of the seeds. The evaluations were: maximum root length and dry mass of shoot, root and total seedlings. The design was randomized blocks. Each experiment (product) had five treatments (doses) and four replicates each. The Stimulate growth regulator applied in seeds with solution reuse shows beneficial action on the initial development of maize plants. Applied to seeds, the NiCoMo, Awaken and Acaplus mineral fertilizers have an unimpressive effect on the initial performance of maize plants, while the organomeric fertilizers Orgamon and Improver have a positive effect on the initial development of maize seedlings.