O uso de estimulante afeta ou não o desenvolvimento inicial da cana-de-açúcar?

Sugarcane (Saccharum officinarum) is one of the most important socioeconomic crops in Brazil, playing an important role in the production of sugar and alcohol. The intensive search for techniques that maximize productivity in the cultivation of sugarcane points to the application of plant regulators or bioregulators aiming at quantitative and qualitative increases in production. In view of the above, the present study aims to evaluate different doses of stimulant in order to verify the initial development of the roots. The experiment was conducted in the city of Cosmorama / SP. We used sugarcane billets from of the RB86 - 7515 variety, which were accommodated in tubes for application of the treatments that correspond to the installment of the dose recommended by the manufacturer: T0 - 0%, T1 - 50%, T2 - 100% (dose recommended by the manufacturer), T3 - 150% and T4 - 200%). Tiller height (AP), tiller number (NP), tiller diameter (DP) and dry mass of tiller with its roots (MSPR) were evaluated. The treatments T0, T1 and T2 didn’t present significant differences in relation to AP and DP. There weren’t statistical differences between treatments when analyzing DP and MSPR. With this study it can be concluded that the use of 50% of the recommended dose of 4-indole-3-ylbutyric acid + gibberellic acid + kinetin influenced mainly the tiller height, however, for the other parameters evaluated, the application of biostimulants in the initial development of the root didn’t present a satisfactory result.