Shallots in Indonesia are valuable but face
production challenges due to their need for over 12 hours of light to boost
productivity, additional lighting and Plant Growth Regulators (PGRs) like
gibberellic acid (GA3) are used to stimulate flower and seed
formation. This research aims to encourage the formation of shallot flowers and
seeds by increasing the duration of light and application of gibberellins. The
research was conducted in Ngringo Village, Jaten Subdistrict, Karanganyar
Regency, Central Java Province from May-August 2023.The
method used was a Nested Randomized Block Design with 3 replications and two
treatment factors which were length of light (0 and additional two hours of
light) and GA3 concentration (0, 50, 100, 150, and 200 ppm). Variables observed consisted of plant
height, flowering age, number of umbels per clump, number of flowers per clump,
percentage of flowering per clump, flower weight per clump, number of seeds per
clump, and seed weight per clump. Data were analyzed using analysis of variance
(ANOVA) with a error level of 5%
and correlation test. The results showed that all treatments did not have a
significant effect on the formation of shallot flowers and seeds. The use of 10
watt LED lights after sunset cannot replace solar energy, and giving various
levels of gibberellin also did not provide significant results.
