Espaçamento entre bulbos e produção de sementes de cebola

Abstract

This study aimed to evaluate the production of onion seeds in farming with a traditional technological level, that is, the cultivation pattern that most onion seeds producers in the municipality of Herval adopt, usually with low technological level. The cultivar used was Bola Precoce and bulbs were purchased in accordance with the Ministry of Agriculture’s Onion Seed Production Norms. The study variables were two distances between bulbs in the row, 10 and 25 cm, considering a single distance between the planting rows of 80cm. Data collection was carried out in 12 units of 5 meters each, for both distances, randomly distributed, in the planting lines and before sprouting. Harvesting was performed as soon as the umbels were mature and, after drying and cleaning, the seeds were stored in a cold chamber at 150C. Flower stem height, number of stems per plant, diameter of floral stems, seed production, as well as seed quality, germination, electrical conductivity, controlled deterioration, weight of 1000 seeds and hectoliter weight were evaluated. Data analysis showed a significant difference for the average number of stems per plant, average length of the smallest stem, weight of a thousand seeds, hectoliter weight and seed yield per plant and per area, allowing to conclude that: 1 - For the same distance between the lines, the smaller the spacing between bulbs, the greater the seed production, and, 2 - The physiological quality of onion seeds produced in the greater spacing between bulbs is slightly higher.