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RESENDE, Juliano Tadeu Vilela de et al. Yield and postharvest quality of onion cultivars in the organic and conventional cropping systems. Bragantia [online]. 2010, vol.69, n.2, pp.305-311. ISSN 0006-8705.

The study aimed to evaluate yield, physical-chemical features and post-harvest losses of onion cultivars grown in organic and conventional cropping systems. Total yield and average weight of bulbs, content of soluble solids, titratable acidity, dry weight and pH. Were evaluated Besides these characteristics, post-harvest losses were also evaluated, with observation of mass loss. The bulbs were stored in cold chamber at a temperature of 3 ° C ± 1 º C and relative humidity of 75% ± 5% for 90 days. The organic system had higher yield than the conventional system, but did not differ significantly in other evaluated characteristics. The hybrid Baia F1 showed the greatest yield and the highest average masses of bulbs in both cropping systems. The Red Creole cultivar showed higher values of soluble solids content and bulbs dry mass than other cultivars in the two cropping systems. These characteristics indicate that Red Creole cultivar is an excellent material for industrialization. Post-harvest evaluations showed that Red Creole cultivar had the highest reduction in the weight of bulbs in conventional and organic systems. This data show that there is no influence of the cropping systems in the bulbs post-harvest conservation.

Keywords : Allium cepa L.; yield; pyruvic acid; pungency.

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