Effectiveness of NPK (11-11-28) fertilizer on the growth and yield of shallot

Abstract

This study aims to determine the effectiveness of NPK (11-11-28) fertilizer on the growth and yield of shallot. This research was carried out in Malang Regency on DS 2019, using of plot 3.5 m x 5 m with 9 treatments, using RBD, repeated 3 times. The treatment includes: A. Control, B. Half of Fertilization Recommended/HFR, C. HFR + NPK 2 g.l-1 water, D. HFR + NPK 4 g.l-1 water, E. HFR + NPK 6 g.l-1 water, F. Full of Fertilization Recommended/FFR, G. FFR + NPK 2 g.l-1 water, H. FFR + NPK 4 g.l-1 water, I. FFR + NPK 6 g.l-1 water. The results showed the application of NPK (11-11-28) fertilizer as much as 6 g.l-1 water combined with 150 kg Urea.ha-1 +250 kg ZA.ha-1 +100 kg SP36.ha-1 +100 kg KCl.ha-1 (treatment E) obtained of dry tuber weight of 14.28 t.ha-1 with an R/C ratio of 4.10. Applying liquid of NPK (11-11-28) fertilizer on shallot plants can reduce the use of inorganic fertilizers of full recommendation and is economically feasible.