Effect of BIOBRAS-16® biostimulant on coffee hypocotyledonary graft attachment

Abstract

The experimental work was developed in the coffee graft acclimatization nursery of the Third Front Agro-Forest Experimental Station, Santiago de Cuba province at 150 meters above sea level, with the objective of evaluating the effect of different concentrations of the biostimulant BIOBRAS-16^® on the budding. of hypocotyledonary graft of Coffea arabica L grafted on rootstock of Coffea canephora P. The average temperature ranged between 25 and 26 °C and the relative humidity was maintained at 90%. Four treatments were carried out, soaking for 3 hours depending on the treatment. The morphoagronomic indicators evaluated were: attachment percentage, plant height (cm), dry mass (g), root volume (cm³), stem diameter (cm). The study of the data was carried out through a descriptive analysis for the variable percentage of attachment and color, the rest of the variables were verified to meet the theoretical assumptions, a simple classification ANOVA and the comparison test of means were carried out. by Duncan for p<0.5 with the statistical package Statistic version 8.0. The Cuban biostimulant BIOBRAS-16^® favors the efficiency of graft take, as well as the subsequent survival of the grafted plants. Imbibition in BIOBRAS-16^® prior to grafting Coffea arabica L. buds on Coffea canephora P. rootstocks increases the morphoagronomic indicators evaluated (plant height, stem diameter, total and root dry mass), the most promising being T3 (imbibition the buds for three hours in 0.5 x10^-3 mg/L of the biostimulant).