Response of Red Onion (Allium ascalonicum, L.) Growth and Yield Response on Coffee Husk Organic Fertilizer and Nitrogen at Various Dosage

Abstract

The application of organic coffee husk fertilizer can improve soil biological, physical as well as chemical properties. However, the nutrient content of organic fertilizer from coffee husks is relatively low. It is necessary to add synthetic fertilizer in agricultural cultivation using coffee husk since the nutrient content of coffee husk organic fertilizer is low. Shallots (Allium ascalonicum L.) need high nutrients for growth and yield. This study aims to compare the growth response and yield of shallots fertilized with organic fertilizer from coffee husks and N at different doses. The study was conducted in January - March 2019 in the Agricultural Land of Mubai Village, Lebong Selatan District, Lebong Regency, Bengkulu. The research design used was a Complete Randomized Block Design (RCBD) factorial consisting of 2 factors. The first factor was organic fertilizer coffee husk consisting of 4 levels, namely 0, 5, 10 and 15 tons/ha. The second factor was the dose of N (Urea) which consists of 4 levels, namely control (0 kg/ha), 150, 300, and 450 kg/ha. The results showed that the application of coffee husk organic fertilizer at different doses increased plant height linearly to the tuber weight per clump and yield per plot. Plant height and tuber yield per plot also increased linearly with an increasing dose of urea fertilizer used.