Evaluación de la extracción de n, p y k en el cultivo de Brócoli Var. Avenger

Abstract

The increase in the consumption of broccoli Brassica oleracea worldwide, for Ecuador in recent years represents a crop of great economic importance. The lack of studies in the country on the requirements demanded by the crop for correct fertilization significantly affects the productivity and quality of broccoli. The objective of this study was to identify the level of N, P and K extraction in the broccoli Brassica oleraca var. Avenger. It was developed in the parish of Mulaló, in the province of Cotopaxi. The research was developed in an open field crop, under a quantitative approach in a non-experimental type of research at a descriptive level. The methodology for the extraction levels and obtaining N, P and K extraction curves, a cultivation area of 2 ha was established, with a sowing density of 55,000 plants ha-1, for the analysis 12 elite plants were selected At 35, 56, 75 and 95 dat, they were sent to the laboratory for analysis, the extraction results of the main macronutrients demanded by the plant were N 348.6 kg ha-1, P 61.7 kg ha-1, and K 295.2 kg ha-1, and the mathematical models of each nutrient were determined with a confidence level for N of 0.95, P of 0.96 and K of 1.0. It is recommended to consider that at 75 dat the accumulated extraction level of 251.8 kg ha-1 of K and 213.2 kg ha-1 of N influences the formation and development of the pellet.