Determination of an efficient irrigation schedule for the cultivation of rose cv. Freedom under greenhouse conditions in Colombia

Published

2014-01-01

Determination of an efficient irrigation schedule for the cultivation of rose cv. Freedom under greenhouse conditions in Colombia

Determinación de una programación de riego eficiente para el cultivo de la rosa cv. Freedom bajo condiciones de invernadero en Colombia

Keywords:

evapotranspiration, soil moisture, leaf water potential, ornamental plants. (en)
evapotranspiración, humedad del suelo, potencial hídrico de la hoja, plantas ornamentales. (es)

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Authors

Jhon Jairo Arévalo Jefe Mirfe, The Elite Flower SAS. Facatativa (Colombia).
Javier Enrique Vélez S. Faculty of Engineering, Universidad Nacional de Colombia. Bogota (Colombia).
Diego Sebastiano Intrigliolo Department of Natural Resources, Instituto Valenciano de Investigaciones Agrarias (IVIA ). Valencia (Spain).

Abstract (en)
Abstract (es)

An experiment on rose (Rosa sp.) cv. Freedom was performed in a greenhouse on the Bogota Plateau, Colombia, to identify an efficient irrigation regime for this crop. The tested treatments were based on three irrigation doses, applying different fractions of the estimated crop evapotranspiration (ETc), calculated using a class A evaporation tank: i) 100% ETc (ETc100), ii) 80% ETc (ETc80) and iii) 70% ETc (ETc70). During the entire experimental period, from mid-May to early September, the crop had a constant production of floral stems. In all of the irrigation treatments, the soil and plant water status were monitored using tensiometers and the midday stem water potential, respectively (ystem). In the fully irrigated roses, the actual water use was determined using a drainage lysimeter in order to obtain the local crop coefficients (Kc) by means of a water balance. From June to August, the obtained monthly Kc values varied between 1.10 and 1.26. Compared to the ETc100 treatment, 14.5 and 21.8% less water was applied in treatments ETc80 and ETc70, respectively. Despite this fact, no statistically significant differences were found among the treatments for rose production or quality. Finally, in the more irrigated roses, tight relationships between the stem water potential and vapor pressure deficit were obtained. The reported base-line equations can be used for predicting the optimum rose plant water status, depending on the environmental conditions. Overall, the reported results can be used for an efficient irritation schedule for rose crops under greenhouse conditions, using the local Kc and direct determinations of plant water status corrected for the evaporative demand.

Se realizó un experimento en un cultivo de rosa (Rosa sp.) cv. Freedom, bajo invernadero en la Sabana de Bogotá, Colombia, con el fin de identificar el régimen de riego más adecuado. Los tratamientos se basan en tres dosis de riego aplicando diferentes fracciones de la evapotranspiración del cultivo (ETc) estimada, calculada utilizando un tanque de evaporación clase A: i) 100% ETc (ETc100), ii) 80% ETc (ETc80) y iii) el 70% ETc (ETc70). Durante todo el período experimental, a partir de mediados de mayo y hasta principios de septiembre, el cultivo tuvo una producción constante de los tallos florales. En todos los tratamientos de riego, el suelo y el estado hídrico de la planta fueron monitoreados usando tensiómetros y el potencial hídrico del tallo respectivamente (ytallo). En el tratamiento ETc100, el consumo de agua se determinó usando un lisímetro de drenaje con el fin de obtener coeficientes de cultivo locales (Kc) por medio de un balance de agua. Durante junio a agosto, los valores de Kc mensuales obtenidos variaron entre 1,10 y 1,26. En comparación con el tratamiento ETc100, se aplicó 14,5 y 21,8% menos de agua en los tratamientos ETc80 y ETc70, respectivamente, sin presentar diferencias significativas entre los tratamientos en producción, calidad y color de la rosa. Por último, en las plantas más irrigadas, se obtuvo una estrecha relación entre el potencial hídrico del tallo y el déficit de presión de vapor. Las ecuaciones encontradas se pueden utilizar para predecir el estado óptimo del agua de la planta, dependiendo de las condiciones ambientales. En general, los resultados reportados se pueden utilizar para una programación de riego eficiente del cultivo de rosa bajo condiciones de invernadero, utilizando los Kc locales y la determinación directa del estado hídrico de la planta corregida por la demanda de evaporación.

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