Doses de bioestimulante no desenvolvimento inicial de plântulas de trigo

Abstract

The establishment of agricultural crops and their initial development is one of the main phases for determining the productive potential of a plant species and it is during this phase that many of the efforts aimed at introducing new technologies have been concentrated. The aim of this study was to evaluate the effect of using different doses of biostimulant on the germination and initial development of wheat seedlings. The experiment was conducted in the seed laboratory of the Instituto Federal Farroupilha, Campus Alegrete/RS, using the TBIO Audaz wheat cultivar. The experimental design used was completely randomized design (CRD), with five (5) treatments and four (4) replications. The treatments (T) were doses of the commercial product Pullseed G - Microxisto®: 0.0 (T1); 0.5 (T2); 1.0 (T3); 1.5 (T4) and 2.0 (T5) mL kg-¹ of seeds. In the laboratory, the experimental units consisted of Germitest paper rolls with 50 wheat seeds, in order to assess the variables first germination count, germination, germination rate index, length of roots and aerial part of the seedlings and fresh and dry matter of roots and aerial part. Increasing the dose of the biostimulant in the seed treatment increased the germination and emergence rate of the wheat seeds. The higher doses of the biostimulants resulted in greater root length, but did not influence the length of the aerial part of the seedlings. In terms of mass production, the highest doses of the biostimulant resulted in the highest values of fresh and dry matter in the roots and aerial part. The use of Pullseed G - Microxisto® between 1.5 and 2.0 mL kg-¹ of seeds provided the best results for the growth and initial development of TBIO Audaz wheat seedlings.