Efecto del nitrógeno, fósforo y boro en la producción de brócoli (Brassica oleracea var.itálica) en Zarcero
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Fecha
1984
Autores
Chinchilla M., Emilio
Hernández López, Jesús
Canessa Mora, Walter
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Universidad de Costa Rica
Resumen
Se realizó un ensayo para estudiar la respuesta del bróculi a la fertilización con nitrógeno, fósforo y boro en Palmira de Alfaro Ruíz, provincia de Alajuela. Se usó el cv. Walthan 29 y se probaron dosis de 0, 150 y 300 kg/ha de nitrógeno, 0, 250 y 500 kg/ha de fósforo y 0,6,8 y 13,6 kg/ha de boro. Como fuentes se emplearon: Nitrato de amonio, triple superfosfato y razorita respectivamente. El nitrógeno mostró un efecto cuadrático en la producción de brotes y flores de primera, segunda y tercera calidad. El fósforo presentó un efecto lineal positivo en la producción de flores se segunda, brotes y peso total. El boro fue un elemento importante en el cultivo de bróculi, con un efecto cuadrático para la producción de flores de segunda calidad y un efecto lineal positivo en la producción de brotes. No hubo respuesta las interacciones NP, NB, PB y NPB en ninguna de las variables estudiadas. El contenido de boro en las hojas, no fue afectado significativamente con la aplicación de nitrógeno; el fósforo tuvo un efecto cuadrático sobre esta variable y la aplicación de boro causó un incremento lineal positivo en su contenido foliar.
To study the broccoli response to nitrogen, phosphorus and boro fertilization; and assay was conducted in Palmira de Alfaro Ruiz, Alajuela, Costa Rica. The cultivar used was Walthan 29 and the fertilizer rates were 0, 150 and 300 kg/ha of nitrogen; 0, 250 and 500 kg/ha of phosphorus and 0, 6, 8 and 13.6 kg/ha of boron. As sources of fertilizer ammonium nitrate, triple superphosphate and razorite were used, respectively. Nitrogen showed a quadratic effect on the yield of flowers of first, second, third quality and lateral sprouts. Phophorus had a lineal positive effect on the yield of second class flowers, lateral sprouts and total weight. Boron showed itself as an important element for broccoli, with a quadratic effect on the production of second class flowers and linear possitive on lateral sprouting. No significant responses were found in the interactions of NP, NB, and NPB on any of the variables studied with respect to the leaf boron content, no significant effect was found with the nitrogen application; phosphorus showed a quadratic effect and when boron was applied, its foliar content increased.
To study the broccoli response to nitrogen, phosphorus and boro fertilization; and assay was conducted in Palmira de Alfaro Ruiz, Alajuela, Costa Rica. The cultivar used was Walthan 29 and the fertilizer rates were 0, 150 and 300 kg/ha of nitrogen; 0, 250 and 500 kg/ha of phosphorus and 0, 6, 8 and 13.6 kg/ha of boron. As sources of fertilizer ammonium nitrate, triple superphosphate and razorite were used, respectively. Nitrogen showed a quadratic effect on the yield of flowers of first, second, third quality and lateral sprouts. Phophorus had a lineal positive effect on the yield of second class flowers, lateral sprouts and total weight. Boron showed itself as an important element for broccoli, with a quadratic effect on the production of second class flowers and linear possitive on lateral sprouting. No significant responses were found in the interactions of NP, NB, and NPB on any of the variables studied with respect to the leaf boron content, no significant effect was found with the nitrogen application; phosphorus showed a quadratic effect and when boron was applied, its foliar content increased.