Efecto de la disminución de N total y aumento de NH4+ en la fórmula de fertirriego en el cultivo de clavel
Resumen
Una alternativa a la lixiviación de nitrógeno en el cultivo de flores de corte es la optimización de la fórmula de fertirriego. Con el objetivo de estudiar la reducción de nitrógeno y el aumento de la proporción de amonio en la relación NH4+:NO3-, se evaluaron en condiciones de invernadero dos concentraciones de nitrógeno total (200-140 mg L-1 en fase vegetativa y 160-112 mg L-1 en fase productiva) y tres relaciones de NH4:NO3- (5:95, 15:85 y 25:75) en clavel estándar cv. Don Pedro sembrado en sustrato. Se determinaron en tres momentos de cultivo los contenidos elementales del tejido vegetal, el pH y la concentración de nitrato en los lixiviados. Se observó mayores concentraciones de Zn y Cu en el tejido vegetal con la disminución de N total; así mismo, se obtuvieron incrementos de N y Zn y disminución de Mg con el incremento NH4+, que, a su vez, disminuyó el pH en el sustrato. La disminución de N total no afectó significativamente el contenido de N en el tejido de la planta, pero si el contenido de NO3- y N total en el lixiviado.
Palabras clave
Dianthus caryophyllus L., Flor de corte, Cultivo sin suelo, Relación amonio:nitrato, Lixiviado
Citas
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