Relaciones nitrogeno-potasio en fertirriego para el cultivo protegido del tomate en la epoca de primavera-verano

• Published in: Cultivos tropicales 2014-10, Vol.35 (4), p.106
• Main Authors: Hernandez Diaz, Mana I, Chailloux Laffita, Marisa, Moreno Placeres, Victor, Mojena Graveran, Modesto, Salgado Pulido, Julia M
• Format: Article
• Language: Spanish
• ISSN: 0258-5936

The present study had as objective to evaluate nutritious solutions with different relations between nitrogen and potassium in the productivity and fruits of tomato quality (hybrid HA 3019) in typical Red Ferralitic soil. The experience was developed in the "Liliana Dimitrova" Horticultural Research during the spring-summer period of years 2006, 2008 and 2009. Four relations N:[K.sub.2]O (N:K) studied: (1:1.5, 1:2.0, 1:2.5 or variant of production and 1:3.0) distributed in a design of randomized blocks with four replicas. During the 2006 were not significant differences between relations N:K 1:2.0 and 1:2.5 as far as yield, nevertheless, during 2008 relation N: K 1:2.0 increased the extra + first and total yield in 19.50 and 18.47% respectively in relation to the control treatment. In the validation experiment (2009) it was confirmed that a relation N:K of 1:2.0 allow to guarantee an appropriate yield formation during the spring--summer time, as well as to reduce the doses of [K.sub.2]O, CaO and MgO, with relationship to the control treatment (N:K 1:2.5) in a 19,11, 17,90 and 16,50%, respectively. The relationship N:K 1:2.0 also allow to coordinate the best commercial and total yield with an appropriate external quality and life in shelf of the tomate fruits, expressed in a bigger hardness and endocarpio diameter, smaller percentage of fruits outside norm and inferior values of losses postharvest to the 7 and 17 days. Key words: internutrients relationships, horticulture, quality, crops El presente estudio tuvo como objetivo evaluar soluciones nutritivas con diferentes relaciones nitrogeno-potasio en la productividad y calidad de los frutos de tomate (hibrido HA 3019) en suelo Ferralitico Rojo tipico. La experiencia se desarrollo en el Instituto de Investigaciones Horticolas "Liliana Dimitrova" durante la epoca de primavera-verano de los anos 2006, 2008 y 2009. Se estudiaron cuatro relaciones N:[K.sub.2]O (N:K) (1:1.5, 1:2.0, 1:2.5 o testigo de produccion y 1:3.0), distribuidas en un diseno de bloques al azar con cuatro replicas. Durante el 2006 no se encontraron diferencias significativas entre las relaciones N:K 1:2.0 y 1:2.5 en cuanto a rendimiento extra, primera, extra+primera y total; sin embargo, durante el 2008 la relacion N:K 1:2.0 incremento el rendimiento extra+primera y total en un 19,50 y 18,47% respectivamente con relacion al tratamiento testigo. En la campana de validacion (2009) se confirmo que la relacion N:K 1:2.0 permite garantizar una ad