Respons Pertumbuhan Jagung Manis Terhadap Pemberian Pupuk Kalium dan Arang Sekam

Fertilization is one way to improve fertility to increase the growth of sweet corn. One of the essential nutrients needed by sweet corn is potassium. Potassium can be obtained from inorganic fertilizers such as KCl or organic fertilizers, such as husk ash. The purpose of this study was to determine the best potassium fertilizer dose to increase the growth of sweet corn. The treatment was arranged factorially consisting of 2 factors and using a randomized block design. The first factor are the dose of potassium fertilizer (K) which consists of: 4 levels of dose: 0 kg / ha KCl (K0), 50 kg / ha KCl (K1), 100 kg / ha KCl, and 150 kg / ha KCl (K3). The second factor is the dose of husk ash, which is 0 tons / ha husk ash (S0) and 1 ton / ha husk ash (S1), so there are 8 treatment combinations. Each treatment combination was repeated three times, so that there were 24 experimental unit plots. The variables observed included: plant height, number of leaves, and stem diameter. Potassium fertilizer application is carried out once at the age of 1 week after planting and application of ash husk 1 week before planting. The data obtained were then analyzed and then continued with Duncan's Multiple Range Test (DMRT) at the level of α = 5%. The results showed that there were no interactions between potassium fertilizer and husk ash at the height, number of leaves, and diameter of sweet corn plants. Potassium fertilizer has a significant effect on increasing plant height and stem diameter of sweet corn plants at 2, 3, 4, 5, 6 and 7 MST. But there is no significant effect on the number of sweet corn leaves. Husk ash application has no significant effect on all observed variables. Application of potassium fertilizer at a dose of 150 kg / ha is able to produce the best growth of sweet corn by increasing plant height and stem diameter. Keywords : Sweet Corn, Potassium, Husk As