PHOSPHORUS FERTILIZATION OF ONION (ALLIUM CEPA L.) AS THE FIRST CROP OF AN HORTICULTURAL ROTATION

It was evaluated the effect on growth, development and yield of onion cv Red Creole of phosphoric fertilization in a Red Ferralitic soil, low in available P, using 4 fertilization systems:

A-without phosphoric fertilizer; B-according to current fertilizer recomendations in Cuba (108 kg P₂O₅/ha); C and D-applications of 100 and 70 % respectively of phosphorus fertilizer as recomended for the whole sequence to onion crop (366 and 265.2 kg P₂O₅/ha); E-basal phosphorus application (132.5 kg P₂O₅/ha broadcasting) plus 37.8 kg P₂O₅/ha (bandel at planting).

It was observed that phosphorus fertilizer didn’t have significant difference in the percentage of soluble solids and the diameter of the bulbs, reaching the highest values with medium and low doses of phosphorus.

There was no significant between the amount of phosphorus applied and the increase of the yield, which show that onion should not start horticultural crop rotation as far as high doses of phosphorus was used.

I International Symposium on Edible Alliaceae

L.E. Pulido Delgado

https://doi.org/10.17660/ActaHortic.1997.433.62