Browsing by Author "Cabrera Villa, Patricia Alexandra"

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    Estudio del contenido de nutrientes en la savia del pecíolo de Solanum lycopersicum L en invernadero de Guachapala
    (Universidad de Cuenca, 2025-08-05) Brito Guamán, Tania Maribel; Cabrera Villa, Patricia Alexandra; Bermúdez, Fernando Gerardo
    Tomato (Solanum lycopersicum L.) is a crop of great economic and nutritional importance. In the Guachapala-Azuay canton, its greenhouse production faces limitations due to nutritional deficiencies caused by continuous soil use, inadequate fertilization management, and the lack of technical analysis. The aim of this study was to identify and characterize these deficiencies and determine the relationship between nutrient levels in the petiole sap and soil. A completely randomized block design (RCBD) was used with three greenhouses as treatments. Samples of leaves and soil were collected and analyzed for N, P, K, pH, electrical conductivity, organic matter, bulk density, and texture. The data were processed using descriptive statistics, normality tests, and correlation coefficients (Pearson or Spearman). The analysis revealed that nitrogen (N) showed adequate levels in most samples, but phosphorus (P) presented mild deficiencies in several greenhouses. Potassium (K), on the other hand, showed excesses in most cases. When analyzing the relationship between nutrients in the sap and soil, a significant correlation was found between nitrogen levels (r = 0.584, p = 0.0462), indicating a moderate relationship. No significant correlations were found for the other variables. These results provide key information to optimize nutritional management and improve the quality and yield of tomato crops in greenhouses, emphasizing the importance of adjusting fertilization according to the crop’s phenological stage.