Evaluación de formulaciones potásicas en el rendimiento y calidad del cultivo de brócoli (Brassica oleracea L) var. Itálica. híbrido Avenger.

Abstract

The aim of this research was to evaluate the effect of potassium formulations on the yield and quality of broccoli (Brassica oleracea L.) var. Itálica. This research was carried out in the canton Pujilí at the Hacienda la Campiña with the help of INIAP, Santa Catalina Experimental Station, using a completely randomized block design, with 4 replications and 8 treatments. In the potassium (K) dose factor, a single level of 300 kg K ha-1 was applied with different fertilizers such as Potassium Nitrate (13.5% N, 45% K2O), Potassium Sulfate (52% K2O, 18% S) and Polysulphate (14% K2O, 17% CaO, 6% MgO, 19% S), with a nutritional control where it was not incorporated (0% K) and an absolute control (0% fertilization). The experimental units consisted on 42 m2 plots with a net plot of 16.5 m2 with 10 broccolis (Brassica oleracea L.) var. Avenger plants randomly selected for data recording. The evaluated methods for the effect of the potassium formulations were: plant height, biomass, equatorial diameter, pellet hardness, nutrient extraction, pellet weight, shelf life, pellet yield and an economic investigation was performed using the cost- benefit analysis. For the interpretation analysis of results, an examination of variance was performed, obtaining the best result with the application of T5 450 kg ha-1 of Polysulphate (T5), with which it had a height of 52.78 cm, a biomass of 154.37 g plant, an extraction with an amount of N; 42.68 kg ha-1 of P; 329.12 kg ha-1 of K, kilograms per hectare respectively, and a yield of 24.17 tons per hectare of pellets. It was concluded that the application of 450 kg ha-1 of Polysulphate (T5) directly influences broccoli (Brassica oleracea L.) var. Avenger yield. It is suggested to implement Polysulphate to improve soil fertility and increase yields and in turn economic income.