TEOR DE PROTEÍNAS EM SEMENTES DE SOJA PRODUZIDAS EM SOLOS DE VÁRZEA COMO USO DE BIOREGULADOR

Abstract

This study aimed to evaluatethe protein content in soybean seeds produced in lowland soil from plant growth regulator applied via seed coating and leaf spraying. The study wasdivided into two experiments: Seeds coating (Experiment I) and leaf spraying (Experiment II) with different Stimulate® doses. Two soybean cultivars were used (BMX Potência RR and Fundacep 64 RR) and the experimental model used was a completely randomized design. For the seed coating, the doses used was0; 250; 500; 750 e 1000 mL 100 kg seeds-1, and for the leaf spraying was 0; 187.5; 375.0; 652.5 e 750.0 mL ha-1. The experiments were carried out during the 2013/2014 season at experimental field and pots. In the maturity period was performed the seed harvest, afterward determined the total and soluble protein content. The bioregulator doses appliedin seed treatment, up tothe highestdose,increase the crude protein content of seeds produced in pots of BMX Potência RRcv.When produced in the experimental field, doses of bioregulator in seed treatment and leaf spraying do not promote difference in the protein content of the seeds. Increases were observed in the total protein content in Fundacep 64 RR cultivar, and reduction in soluble protein content in BMX Potência RR with the use of bioregulator, regardless of the mode of application.