QUALITY OF ONION DUE TO NITROGEN DOSES AND PLANTING TIMES

Authors

  • Gardênia Silvana de Oliveira Rodrigues Departamento de Ciências Vegetais, UFERSA, Caixa Postal 137, 59625-900, Mossoró-RN.
  • Leilson Costa Grangeiro Departamento de Ciências Vegetais, UFERSA, Caixa Postal 137, 59625-900, Mossoró-RN.
  • Maria Zuleide de Negreiros Departamento de Ciências Vegetais, UFERSA, Caixa Postal 137, 59625-900, Mossoró-RN.
  • Ana Cláudia da Silva Departamento de Ciências Vegetais, UFERSA, Caixa Postal 137, 59625-900, Mossoró-RN.
  • José Novo Júnior Departamento de Ciências Vegetais, UFERSA, Caixa Postal 137, 59625-900, Mossoró-RN.

DOI:

https://doi.org/10.1590/1983-21252015v28n327rc

Keywords:

Allium cepa. Pungency. Soluble solids.

Abstract

The classification of the onion made based on the diameter of the bulbs and the quality measured by soluble solids, titratable acidity, relation soluble solids /acidity e a pungency due to nitrogen and planting times were evaluated in two experiments conducted from december 2011 to April 2012 and August tha december to 2012, horta in the Department of Plant Sciences Universidade Federal Rural do Semi-Árida em Mossoró-RN. The experimental design was a randomized block with four replications. The treatments consisted of N rates: 0, 34, 67, 101, 134 and 168 kg ha -1 N. Each experimental unit consisted of a bed of 3,0 x 0,8 m, satisfaction eight rows of plants spaced 0.10 x 0.10 m. Was used as floor area, the six central rows of plants in the flowerbed. The bulb pungency increased with the supply of nitrogen to the dose of 93 kg ha-1. Acidity and soluble solids reduced with the application of nitrogen. The onion planting in August 2012 favored the production of better quality bulbs.

Author Biography

  • Gardênia Silvana de Oliveira Rodrigues, Departamento de Ciências Vegetais, UFERSA, Caixa Postal 137, 59625-900, Mossoró-RN.
    Doutora em Fitotecnia.

Published

31-08-2015

Issue

Section

Technical Note