Evaluation of Commercial Biostimulants at Three Planting Densities in Roselle (Hibiscus sabdariffa L.) Crop, Guerrero Variety Evaluation of commercial biostimulants in three sowing densities of hibiscus crops grown in greenhouses

Resumen

Objective: The objective was to evaluate the physiological and productive response of roselle crop in the induction of three commercial biostimulants in three greenhouse planting densities.

Design/methodology/approach: The experiment consisted of three treatments and a control; T1 (high density) with Super Hormonal, T2 (low density) with Cito Xplosion, T3 (medium density) with Vitaminum Forte and Control (TES). The physiological variables evaluated were (plant height, stem diameter, number of branches, fresh and dry biomass), yield (fresh and dry weight of calyxes) and quality (titratable acidity, total soluble solids (°Brix), pH and electrical conductivity).

Results: plant heights of 168.3, 187.3, 219.5, 183.3 cm were obtained for T1, T2, T3 and control. For stem diameter, T2 was better with 2.9 cm, while T3 was better in number of branches. T2 presented a greater number of calyxes, however, the best yield was obtained in T1 with 25.9 t ha^-1 of fresh calyxes and 3.86 t ha^-1 of dry calyxes. The control was better with 10.1 in °Brix and 45.8 meq/100 g of titratable acidity, while the T1 was better in pH and electrical conductivity as quality parameters.

Limitations on study/implications: evaluate other biostimulants in other planting densities and modify the concentration of the nutrient solution to know the physiological and productive response of the plant.

Findings/conclusions: The use of biostimulants in combination with agronomic management and nutrition can substantially improve the yield and quality variables of dry calyxes.