Agronomic performance of Marandu grass treated with plant growth biostimulants in the Amazon biome

Abstract

The aim was to evaluate the effect of different doses of two biostimulants on the productivity and canopy structure of Urochloa brizantha cv. Marandu grass in the establishment fase. The study was conducted in Universidade Federal Rural da Amazônia, Parauapebas, Pará, Brazil. One module of 35 plots of 25m² were established. A completely randomized experimental design was used, with seven treatments and five replicates. The treatments included a control, 0.5, 1, and 2kg/ha of biostimulant A (BIOST.A); and 0.25, 0.5, and 1L/ha of biostimulant B (BIOST.B). Three collections were performed. The data for application of the two biostimulants were analyzed separately, using the Dummy variable method and regression analysis. The application of 2kg/ha BIOST.A resulted in increases of 842kg/ha in the forage mass. The application of BIOST.B on Marandu grass resulted in a linear increase in stem mass. The application of 2kg/ha BIOST.A in the establishment of Marandu grass result in higher growth rates, forage accumulation, and stem proportion in the canopy.

Growth bioestimulant in marandu grass cultivated in the amazon biome

“…Similar results were observed with the application of a biostimulant that contained an auxinic complex (400 ppm), with an increase of 5.75% in the accumulated DM production and 6.71% in the production of M ha −1 day −1 in Marandu grass with the application of 2 kg ha −1 (Oliveira et al, 2019).…”

“…Currently, few studies have used biostimulants in forage grasses, being required more studies evaluating applications and doses. An improvement in the Marandu production has already been observed during its establishment using auxinbased biostimulants, reaching values of 5.75% of accumulated DM in the pasture (Oliveira et al, 2019). Another experiment, also with auxin-based biostimulant, presented an increase of 36.34% of accumulated DM in the pasture when applying 1.25 L ha −1 on a hybrid of the genus Urochloa .…”

“…In this sense, biostimulants have been used mainly in systems that aim for precision agriculture (Oliveira et al, 2019;Lima et al, 2019). Biostimulants are complexes that contain substances such as auxins, gibberellins, cytokinins, and their analogs, which act mainly in the regulation of growth, elongation, and cell division (Santos et al, 2017), favoring the expression of the genetic potential of the plant and, consequently, stimulating the shoot and root system growth (Magalhães et al, 2016).…”

Incidence of the shading, bioregulators and biostimulant on the growth and yield of Mombaza grass (Panicum maximum Jacq.)

“…Se han reportado los beneficios de dichos productos en cuanto al establecimiento del cultivo, características morfoestructurales (Rocha et al, 2019), producción y calidad del pasto (Oliveira et al, 2019;Aguilar et al, 2020) y las concentraciones de N, P y K, y de bioproductos (biofertilizantes y hongos micorrízicos arbusculares) en la biomasa aérea del forraje (Plana et al, 2016). Sin embargo, en Mombaza se requieren estudios sobre este tipo de técnicas.…”

“…The benefits of these products have been reported in terms of crop establishment, morphostructural characteristics (Rocha et al, 2019), production and quality of the pasture (Oliveira et al, 2019;Aguilar et al, 2020) and concentrations of N, P and K, and of bioproducts (biofertilizers and arbuscular mycorrhizal fungi) in the aerial biomass of the forage (Plana et al, 2016). However, Mombaza requires studies on this type of technique.…”