Análisis de absorción y concentración de nutrirnentos en dos cultivares de papa (Solanum tuberosum L.) en la zona norte de Cartago
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Cortés, José J.
Moreira, Marco A.
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Universidad de Costa Rica
Abstract
En la zona de Potrero Cerrado de Oreamuno de Cartago, Costa Rica, desde mayo a octubre de 1987, se realizó un experimento para determinar la absorción y el contenido de los nutrimentos N, P, K, Ca, Mg y S, Y su relación con las etapas de desarrollo de la planta, durante el ciclo del cultivo en los cultivares Atzimba y Granola. Se empleó un diseño de bloques completos al azar con un arreglo de parcelas divididas. La parcela grande correspondió a los cultivares y la subparcela a las edades de muestreo. El N, P Y K fueron los elementos que la planta absorbió en mayor cantidad o Las concentración foliares de N, P Y K tendieron a disminuir a medida que se avanzó en el ciclo de la planta mientras que el Ca ascendió durante el ciclo hasta llegar a un máximo al final del mismo. La mayor absorción de N, K, P, Mg Y Ca se presentó en el crecimiento del cultivo y se mantuvieron estables durante la etapa de llenado del tubérculo, excepto el P que inició su descenso en forma creciente hasta estabilizarse en la etapa de maduración del tubérculo. La absorción de S fue cíclica durante todo el desarrollo del cultivo. las concentraciones de Mg aumentaron durante la etapa de crecimiento de la parte aérea y posteriormente se redujeron. La concentración foliar de S fluctuó a través del ciclo del cultivo y en general fue el nutrimento que presentó los niveles de concentración más bajos.
An experiment was conducted, from May to October of 1987, in Potrero Cerrado de Oreamuno in Northern Cartago-Costa Rica, to determine the N, P, K, Ca, Mg and S absorption and content and their relationship with the growing stages of the plant, during the crop cycle of the Atzimba and Granola patato cultivars. A Complete Randomized Block design with a split-plot arrangement was used. The large plot corresponded to the cultivars and the sub-plot to the msampling stages. The N, P and K were the elements absorbed in larger quantities o The foliar concentration of N, P and K tend to decrease along the growing cycle reaching its minimum by the end of the cycle. The largest N, P, K, Ca and Mg absorption took place during the growing period and remained stable during the stage of tuber filling, except for the P which started its descend in a growing way until stabilizing at the tuber maturation stage. The S absorption was cyclic during the whole crop's growing period The Mg concentrations raised in the aerial part during the growing stage and decreased later on. The foliar S concentration varied throughout the crop's cycle and as a whole, is the element which shows the lowest concentration levels.
An experiment was conducted, from May to October of 1987, in Potrero Cerrado de Oreamuno in Northern Cartago-Costa Rica, to determine the N, P, K, Ca, Mg and S absorption and content and their relationship with the growing stages of the plant, during the crop cycle of the Atzimba and Granola patato cultivars. A Complete Randomized Block design with a split-plot arrangement was used. The large plot corresponded to the cultivars and the sub-plot to the msampling stages. The N, P and K were the elements absorbed in larger quantities o The foliar concentration of N, P and K tend to decrease along the growing cycle reaching its minimum by the end of the cycle. The largest N, P, K, Ca and Mg absorption took place during the growing period and remained stable during the stage of tuber filling, except for the P which started its descend in a growing way until stabilizing at the tuber maturation stage. The S absorption was cyclic during the whole crop's growing period The Mg concentrations raised in the aerial part during the growing stage and decreased later on. The foliar S concentration varied throughout the crop's cycle and as a whole, is the element which shows the lowest concentration levels.