Resposta do capim zuri sob ação de bioestimulantes

Abstract

In recent years, ranchers have been implementing the development of intensive systems for the production of ruminants on pasture, enabling plausible alternatives to increase productivity. In this context, the use of biostimulants is a viable opportunity for this increase in several cultures, mainly for forage crops. The objective of this study was to evaluate the productivity and response of forage grass to the application of biostimulant, with a view to reducing abiotic stress, resulting in greater productivity and quality of the forage mass, in the final third of the wet season (summer) until entry during the dry season (winter). The pasture used was Megathyrsus maximus grass (Syn. Panicum maximum) cv. BRS Zuri, established 3 years ago. The experimental design was in randomized blocks, with three treatments and four replications, in a total of 12 plots with dimensions of 3 x 4 m. The treatments were two commercial biostimulants (ExpertGrow and Bioativador Raiz) and a witness control. Initially, a uniformization cut of the plants was performed at 25 cm in height. At seven days of age of regrowth (02/28/2022) foliar application was made in a single dose at the beginning of the experiment, with measurement of pasture growth every seven days, and cuts for evaluation, at 28 days after application of the treatments. Two evaluation cuts were performed. The ExpertGrow and Bioativador Raiz treatments showed significant results (P<0.5) for forage dry mass (MSF/Kg/ha) and forage canopy height (cm), only in the first growth cycle, when compared to the control treatment, with emphasis on ExpertGrow with an increase of 77% compared to Bioativador Raiz. There was no significant influence (P>0.5) of biostimulants on qualitative forage attributes (PB, FDN and FDA) for any of the two growth cycles evaluated.