RESPON PERTUMBUHAN DAN PRODUKSI BAWANG MERAH (Allium ascalonicum L. Var. TUKTUK) ASAL BIJI TERHADAP PEMBERIAN PUPUK KALIUM DAN JARAK TANAM

Abstract

The aim of the research was to evaluated the effect of potassium fertilizer (K) and the planting distance on the growth and yield of onion (Allium ascalonicum L.) varieties Tuktuk. The research used Randomized Block Design with two-factors. The first factor was the doses of potasium fertilizer (KCl) with four levels e.g : K0 = without KCl (control), K1=10 g KCl/m², K2= 20 g KCl/m² and K3 = 30 g KCl/m². The second factor was planting distance with three levels e.g : J1 = 10x10 cm, J2 = 10 x 15 cm and J3 = 10 x 20 cm. The results showed that the diameter of tubers, wet weight of tubers per sample and dry weight of tubers per sample were significantly affected by potasium fertilizers. The higest of diameter of tubers, wet weight of tubers per sample and dry weight of tubers per sample were produced by K2, whistling of each were 3,72 cm, 18,69 g and 5,61 g, but plant height and leafs number were unsignificantly. Where as, plant height were signifcantly affacted by planting distance were prouced by J2 e.g 16,01 cm, but leafs of number, diameter of tubers, wet weight of tubers per sample and dry weight of tubers per sample unsignificantly. Interaction of potasium fertilizer and planting distance significantly affected the wet weight of tubers per plot and dry weight of tubers per plot. The higest of wet weight of tubers per plot and dry weight of tubers per plot were produce by K2J1 were 1,34 kg and 0,40 kg. __________________________________________________________________ Key words: onion, potassium fertilizer and planting distance