Fertilizer Nitrogen Application for Short-Day Onion Production: From Field to Table

Long growing seasons, relatively shallow root system, coarse textured soils, and variability of the subtropical environmental conditions southeastern U.S. create challenges for nitrogen (N) fertilizer management short-day onions. The objectives this study were: (i) to evaluate impact N rates on yield bulb quality three onion cultivars grown under U.S., (ii) assess rate onions consumers’ preference. Field experiments were conducted in 2019 2020 at Vidalia Onion Vegetable Research Center University Georgia located Lyons, GA, which a two factorial experimental design five (84, 101, 117, 134, 151 kg ha?1) (Sweet Agent, Vidora, Quick Start) was evaluated randomized complete block design. During both rainfall events directly impacted soil mineral content. While availability increased with application, there no significant difference among treatments due distribution years studied, except initiation when application 117 ha?1 sustained that maximized 128 ha?1. total averaged 37,365 34,699 2020. In general, colossal, jumbo, medium-sized represented 7%, 76%, 17% yield, respectively. Jumbo-sized are most interest growers their high value, jumbo-sized 158 138 Bulb bacterial rots not by treatments. Contrarily, gallic acid (GAE) linearly pyruvic quadratically rate. Ultimately, taste panel indicated sensory characteristics also affected different rates. Overall, 134 could sustain without impacting yield; however, an investigation timing should be determine strategy will promote optimum quality, flavor, consumer acceptability.