GROWTH RESPONSE AND YIELD OF THE RED ONION (Allium ascalonicum, L.) BY APPLYING OF HUSK CHARCOAL AND FERTILIZER K

Abstract

Cultivation of Red Onions (Allium ascalonicum, L.) in paddy fields needs to be investigated further because paddy fields have constraints on the physical and chemical properties of the soil. The application of husk charcoal and K fertilizer is expected to increase the productivity of Red Onions, so it is necessary to study the appropriate dose. The aims of this research was determining the effect of the interaction between the application of husk charcoal and KCl fertilizer, and or the influence of each factor on the growth and yield of Red Onions. The results showed that rice husk charcoal treatment at a dose of 20 tons.ha^-1 was effective in increasing the growth and yield of Red Onions compared to rice husk charcoal at a dose of 10 tons.ha^-1 and 0 tons.ha^-1 (control), as evidenced by the variable shallot plant height, number of leaves, number of tubers per clump, wet tuber weight per clump, and tuber dry weight per clump. KCl fertilizer treatments at doses of 100 kg.ha^-1, 200 kg.ha^-1, and 300 kg.ha^-1 did not significantly affect to growth and yield of Red Onions, as well as the interaction between the two treatments.