Influencia de nitrógeno y potasio sobre productividad y calidad en naranja ‘valencia’ citrus sinensis [l.] osbeck en condiciones del Valle del Cauca
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Se evaluó el efecto de nueve tratamientos de fertilización sobre la calidad y el rendimiento en Kg.ha-1 de frutos, El diseño empleado fue bloques completos al azar con nueve tratamientos y nueve repeticiones. Al comparar los resultados con el testigo se observó que: i) de las dosis de nitrógeno utilizadas, la de 150 Kg.ha-1 influyó significativamente en la producción total de fruta por planta e incrementó la producción por Ha hasta 17,07 T.ha-1 que representaría un estimado anual de más de 30 T.ha-1-año-1, valor cercano a las 40 T.ha-1-año-1 reportadas como las obtenidas en condiciones tecnificadas de la naranja valencia en el Valle del Cauca. ii) la aplicación de potasio no mostró resultados estadísticamente significativos, pero si se encontró una disminución de los parámetros productivos, probablemente debido a que las concentraciones en el suelo son altas y las aplicaciones generaron excesos. De acuerdo a este estudio es necesario continuar con la investigación sobre las dosis de N y K+ óptimas para el mejoramiento de la productividad y los parámetros de calidad en fruta.
//Abstract: There was an evaluation on the effect of nine fertilization treatments on the quality of the fruit and their performance (kg.ha-1) of 'Valencia' Orange, the assessment was based on a complete random block design with nine blocks, nine treatments, three orange trees per treatment that were analyzed two times a year. Once asessed the effects, the 150 kg.ha-1 Nitrogen dosses showed significant influence on the agronomical productions, with 17.07 T.ha-1. This results occur twice a year, with a value close to 40 T.ha-1, This performance result is similar with the one described as a tecnified production of „Valencia‟ orange grown in Valle del Cauca. The fertilization with potassium doesn´t show statistic differences, but it shows a decrease in growing performance. It´s due to the fact that there was already a sufficient concentration of this element in the soil, This should lead to excessive potassium concentrations. According to the present results its necessary to continue with further research about optimal dosses of N and K+, to increase performance and quality of the tropical fruit of "Valencia" orange growning.
//Abstract: There was an evaluation on the effect of nine fertilization treatments on the quality of the fruit and their performance (kg.ha-1) of 'Valencia' Orange, the assessment was based on a complete random block design with nine blocks, nine treatments, three orange trees per treatment that were analyzed two times a year. Once asessed the effects, the 150 kg.ha-1 Nitrogen dosses showed significant influence on the agronomical productions, with 17.07 T.ha-1. This results occur twice a year, with a value close to 40 T.ha-1, This performance result is similar with the one described as a tecnified production of „Valencia‟ orange grown in Valle del Cauca. The fertilization with potassium doesn´t show statistic differences, but it shows a decrease in growing performance. It´s due to the fact that there was already a sufficient concentration of this element in the soil, This should lead to excessive potassium concentrations. According to the present results its necessary to continue with further research about optimal dosses of N and K+, to increase performance and quality of the tropical fruit of "Valencia" orange growning.