Bioestimulantes na produção de mudas de Coffea canephora

Abstract

Coffee growing stands out in the national economic scenario, with Brazil responsible for more than a third of world production. To reach the desired level of high productivity, the production of vigorous and well-nourished seedlings is of fundamental importance. The use of biostimulants in the production of seedlings is a promising alternative, algae-based products can provide better root development, with more vigorous and healthier roots, in addition to better use of water and nutrients from the substrate, and can even act as a conditioner for soil, contributing to physical, chemical and biological improvement. . The objective of this study was to evaluate the efficiency of two commercial products with biostimulant action in the production of Coffea canephora seedlings. The experimental design used was in randomized blocks, testing four independent doses for each product plus a control treatment without any product dosage, with four replications and 25 plants per plot, in a total of 900 evaluated seedlings. The liquid product (Vitanica® RZ) was evaluated at doses: (0.75; 1.5; 2.25; 3.0 ml L-1 ) and the mineral product (LithoMicron 3000®) at doses: (0.75 ; 1.5; 2.25; 3.0 g L-1 ), applied every 15 days by soaking the seedlings. Morphological, physiological and nutritional variables were analyzed. The treatment composed of the product Vitanyca RZ® at the lowest established dosage of 0.75 ml L-1 , provided greater stomatal conductance, whereas the treatment composed of the product LithoMicrom 3000® at the dosage of 3.0 g L-1 enabled a higher K content in the root dry matter of Coffea canephora seedlings. The rest of the analyzed variables, including the morphological variables and the leaf nutrient content in the dry matter, were not influenced by the treatments.