Resposta inicial de plantas de arroz (Oryza sativa L.) tratadas com insumos biológicos

Abstract

In order to reduce the environmental impacts caused by the excess of synthetic products in agriculture, the use of biological inputs has become essential to combine productivity and sustainability in agricultural practice. The goal was to evaluate the initial growth of rice plants that received seed treatment with biological inputs based on bacteria. The experimental design was in randomized blocks, with four treatments and four replications. The treatments were: T1 - Control treatment; T2 - Pseudomonas fluorescens and Azospirillum brasilense; T3 - Bacillus subtilis, B.amyloliquefacien and B.pumilus; T4 - Pseudomonas fluorescens, Azospirillum brasilense + Bacillus subtilis, B.amyloliquefacien and B.pumilus. Sowing took place on October 25, 2022, in the amount of 80 kg ha-1, being converted to the area of 20 m2, reaching the amount of 0.160 kg that were divided into the repetitions of treatments. The evaluations were carried out 30 days after sowing and related to the variables: length of the shoot, root length, largest leaf, fresh and dry mass of the shoot and fresh and dry mass of the root. All treatments inoculated with biological inputs showed an increase in comparison with the control treatment. T4 was the one that presented the most satisfactory results, showing more positive increments in the analyzed variables. There was no significant difference for the largest leaf, as all treatments were similar to the control treatment in this variable.