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The flowering induction in mango (Mangifera indica L.) orchards is an agricultural practice carried out on tropical regions to obtain fruits out-of-season looking to reach better sale prices. The objective of this research was to evaluate the effect of potassium (PN), ammonium nitrate (AN) and paclobutrazol (PBZ) on flowering induction and fruit production in mango cv. Tommy Atkins. The experiment included fourteen treatments with 2, 4, and 6 % PN, and 2, 3 and 4 % AN applied in combination with PBZ (1 g of a.i. m-1 of canopy diameter), paclobutrazol alone (1 g of a.i. m-1 of canopy diameter), and a control (water), which were arranged in a completely randomized design with three replicates. Results show that floral induction and fruit production were improved: PBZ followed by foliar application PN 2 %, 4 % or 6 % induced flowering 16 days after treatments. Likewise, the major number of emerged panicles were obtained with PBZ + PN 6 %. An increase on fruit weight and size reduction was observed at harvest. PBZ followed by foliar application of nitrates induced flowering and enhanced the number developed panicles in mango cv. Tommy Atkins.RESUMENLa induccion floral en mango (Mangifera indica L.) es una practica agricola comun en regiones tropicales, tendiente a obtener frutos fuera de temporada para lograr mejores precios de la cosecha. Este trabajo tuvo como objetivo evaluar el efecto de tratamientos de nitrato de potasio (PN), nitrato de amonio (AN) y paclobutrazol (PBZ) sobre la induccion floral y produccion de fruto en mango cv. Tommy Atkins. Los tratamientos con PN al 2, 4, y 6 % y AN al 2, 3 y 4 % fueron aplicados solos o combinados con PBZ (1 g de i.a. m-1 de diametro de copa), PBZ solo y un testigo (agua) bajo un diseno completamente al azar, con tres repeticiones. Se midieron variables de induccion floral y produccion de fruto. Los resultados muestran que aplicacion foliar de PBZ seguida de PN (2 %), (4 %) o (6 %) indujeron floracion 16 dias despues del tratamiento. El mayor numero de paniculas emergidas se obtuvieron con PBZ + PN 6 %. Se observo una reduccion de peso y tamano de fruto a la cosecha. El PBZ seguido de aplicaciones foliares con NP y AN induce floracion y aumenta el numero de paniculas desarrolladas en mango cv. Tommy Atkins.

biotecnia

Effect of nitrates alone or with paclobutrazol on flowering induction and production in mango cv. Tommy Atkins//Efecto de nitratos solos o con paclobutrazol en la inducción floral y producción en mango cv. Tommy Atkins