Avaliação da eficiência de indutores de enraizamento e bactérias fixadoras de nitrogênio na cultura da soja (Glicyne max (L.) Merrill)

Abstract

Seed Treatment is extremely important from germination to the final stage of the plant where the action of insecticides, fungicides, rooters, and bacteria added to the treatment contribute to the prevention of the seeds against pests attack and diseases. The purpose of this research was to measure physiology and productivity of soybean crop (Glycine max L.) when applied nitrogen-fixing bacteria of the genre Bradyrhizobium sp. e Azospirillum sp. acting isolated and associated with and without using rooting inductors. Seed Treatment was performed on the same day of seeding, which raises the viability of the practice. The experiment was carried out in Completely Randomized Design with eight treatments and four repetitions being T1: Rooting + Bradyrhizobium sp.; T2: Rooting; T3: Rooting + Azospirillum sp.; T4: Rooting + Bradyrhizobium sp. + Azospirillum sp.; T5: Bradyrhizobium sp.; T6: Azospirillum sp.; T7: Bradyrhizobium sp. + Azospirillum sp.; T8: Witness. The first, the second, and the third assessment was done on twenty, thirty, and fifty days respectively after the germination so that in the first assessment was carried out the measuring size of each treatment plant. On the evaluation was verified the height and the number of trifolios of the plant. On the third evaluation at fifty days was rated the height of the plant, number of trifolios, the root size, and the number of viable nodules. Obtained an average of 1.49 kg. Plot -1, equivalent to 3,311 hg / ha-1, an average higher than the other treatments. The t4 also presented the highest number of viable nodules and length of the redicular system, showing that co-inoculation combined with the use of rooting has great potential, being an important alternative in the search for greater production.