Resumen

VILORIA, Ana; ARTEAGA, Lis; DIAZ, Lisbeth  y  DELGADO, Douglas. Effect of N-P-K fertilization and planting distance on onion (Allium cepa L.) yield. Bioagro [online]. 2003, vol.15, n.2, pp.129-133. ISSN 1316-3361.

The effect of four doses of N-P-K and four plant spacing on size and yield of Texas Grano 438 onion bulb was studied in a latin square design. Bulb diameter was dependent on fertilization and plant spacing. At the 12 x 20 cm spacing, maximum diameters were obtained with the lowest level of fertilization (150-44-166 kg/ha N-P-K, respectively) while with higher dose the maximum diameter was found at the 10 x 20 cm plant spacing. When spacing was changed from 6 x 20 cm to 12 x 20 cm, the bulb's height and fresh weight were significantly modified, obtaining maximum values at the 10 x 20 cm. No differences were found for fertilizer dose. Yield per area unit showed results in indirect proportion to plant spacing.

Palabras clave : Mineral nutrition; cultural practices; bulb formation; nitrogen.