Eficiencia de utilización de nutrientes por posturas de cafetos producidas en tubetes.

In order to evaluate application effect of doses of controlled release fertilizers on the efficiency of the use of nitrogen, phosphorus and potassium by coffee seedlings variety Isla 6-14 produced in tubes, the experiment was developed in the nursery of the Institute for Agro-Forestry Research UCTB Tercer Frente, from November 2018 to May 2019. In a completely randomized design, seven doses of the controlled release fertilizer Multicote (0; 1; 2; 3; 4; 5 and 6 g tube-1) were studied. The fertilizer was applied at the time of preparing the Brown soil substrate-bovine manure in a 1:1 ratio. The absorption of nitrogen, phosphorus and potassium, the efficiency of use of these macronutrients and their relationship with the seedling's quality index were evaluated. The data were subjected to a simple classification analysis of variance and Duncan's test was applied at 5 % probability to compare the means. The nutrient utilization efficiency was higher for phosphorus followed by nitrogen and finally potassium, regardless of the applied fertilizer dose. When applying the dose of 2 g tube-1 of the fertilizer, the highest efficiency values were found. The seedling's quality index increased with the efficiency of nutrient utilization. [ABSTRACT FROM AUTHOR]