Unidad Posgrado Facultad Ingeniería Agronómica
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Item Evaluación del efecto bioestimulante del ácido fúlvico en el comportamiento agronómico del racimo de tomate riñón (Solanum lycopersicum Mill), en invernadero(2023-02) Delgado Montesdeoca, Ernesto EfraínIn Ecuador, the cultivation of kidney tomato (Solanum lycopersicum Mill) is produced intensively, under greenhouse conditions and using high doses of fertilizers that exceed the nutritional needs required to obtain satisfactory productions, as a result, this excess has left consequences such as deterioration and desertification of the soil and in addition to affecting the economic aspect for which the trend of sustainable agriculture has been generated. Therefore, the main objective of this study was to determine the "biostimulant effect of fulvic acid on the agronomic behavior of the kidney tomato (Solanum lycopersicum Mill)" under greenhouse conditions. The experimental design used was completely randomized blocks (DBCA), with four treatments T1 (absolute control), T2 (500 g/ha), T3 (1000 g/ha) and T4 (1500 g/ha) arranged in three repetitions; the variables of stem height and diameter at 45, 60 and 135 days, the number of fruits at 50, 65 and 80 days after transplanting, the size of the fruit, production and yield were also evaluated. The data collected during the development of the crop were statistically analyzed by the ANOVA test with a p < 0.05 on the established dates, the best results obtained in the variable height and stem diameter after transplanting at 135 days correspond to T4 (1500 g /ha of fulvic acids) with values of 170.8 cm and 1.38 cm respectively, but nevertheless there was T3 (1000 g/ha of fulvic acids) with 168.13 cm and 1.36 cm and also T2 (500 g/ha of fulvic acids) with values of 167.97 cm and 1.27 cm respectively, obtained favorable results in terms of the variables mentioned, with respect to the number of fruits after transplanting at 80 days, the best treatments were T4 with 21.13, T3 with 18.10, T2 with 14.90 and T1 with 13.17; As regards the fruit size variable, there was no significant difference and finally, in the economic analysis, the best Cost-Benefit ratio-1 corresponds to T4 with $1.89, that is, for each dollar invested, a profit of $0.89 US dollars is obtained, while that T3 presents a Benefit Cost-1 ratio of $1.65 whose profit is $0.65 cents for each dollar invested by the farmer, T2 presents a Benefit Cost-1 ratio of $1.42 whose profit is 0.42 cents for each dollar invested and T1 presents a Benefit-Cost-1 ratio of $0.96, that is, of the dollar invested, only $0.96 is recovered with a return of -4.02%. Descriptors: Fulvic acids. Humic acids, Biostimulant, complexing agent, chelating agent, staking, F1 hybrid varieties, Solanum lycopersicum Mill, pruning, draining, kidney tomato.