Optimization of Potassium Sulfate (K2SO4) Against Disease and Results curly leaf varieties Red Chili (Capsicum annuum L.)

Abstract

This research was conducted in the experimental field of the Faculty of Agriculture, University of Muhammadiyah North Sumatra with a height of 27 meters above sea level carried out in July to November 2012. This study aims to determine the best dose and frequency of K₂SO₄ to support the yield of red chili varieties. Doses of K₂SO₄ used: 0, 1.5, 3, 4.5 g / liter and frequency of administration of K₂SO₄ 6, 9, 12 times the administration during planting. This study uses a divided factor design (RPT) with two factors designed, the first child plots factor is the temporary factor the second factor with the main plot of chili varieties with 3 replications. The results showed the fact that the application of K₂SO₄ to critical leaf disease binds significantly to variety and the dose and frequency of K₂SO₄ as well as to significantly affect plant height, and weight of perplot fruit. The average treatment of plants attacked by most leaf criticism for each variety was in the application of potassium sulfate (K₂SO₄) with an average percentage of attacks of 77.07%. In each variation the average plant was attacked by the least leaf criting in the application of potassium sulfate (K₂SO₄) at a concentration of 4.5 gr / liter and the frequency of administration 12 times in high plants of chilli plants at K9 dose (4.5 g / l air) had plant height is higher than with other doses. the highest weight of plot plots in Landung varieties, the highest fruit weight at 4th harvest was 2903.19 g, from the table it can be seen that according to the 5th harvest the crop fruit weight increased, whereas in TM 999 varieties and Lado the fruit weight per crop experienced an increase from harvest 1 to 5