The role of sulfur and paclobutrazol on the growth of shallots (Allium ascalonicum (L.) Sanren F-1 varieties from true shallot seed

Abstract

The latest technological developments in shallot cultivation can be done using True Shallot Seed (TSS). The obstacle is the character experiencing difficulty in senescence and long harvesting age. The presence of growth inhibitor is necessary to focus the energy on tuber formation. This research aimed to evaluate the effect of sulfur and paclobutrazol on the growth of shallots from TSS. The research was conducted using polybag in the community land in Medan, using a factorial randomized block design with 2 factors and 3 replications. The first factor was sulfur (0, 75, 150 kg ZA/ha) applications, and the second factor was paclobutrazol (0, 15, 30 ppm) applications. The results showed that 150 kg ZA/ha sulfur application increased the plant length 1-5 weeks after transplanting. The treatment of paclobutrazol and the interaction between paclobutrazol and sulfur applications had no significant effect on plant length and leaf number at 1-4 weeks after transplanting.