he Effect of Volcanic Ash Addition to The Chemical Quality of Excreta Organic Fertilizer

Abstract

This research aims to know the effect addition of volcanic ash to the chemical quality of excreta organic fertilizer. This study consists of five treatments, the first treatment 0%(T0) addition of volcanic ash as control, the second treatment 5%(T1), the third treatment 10%(T2), the fourth treatment 15%(T3), and the fifth treatment 20%(T4). Parameters that were observed covering the chemical quality are temperature of composting, N total, P total, K total. The data were tested analysis variance of completely randomized design of one way anova, and the mean differences were analyzed with Duncan’s New Multiple Range Test (DMRT). The results showed that the addition of volcanic ash on the treatments was not significally different to the control (T0) of N total. The contents of N total that contained in organic fertilizer on the addition of 0, 5, 10, 15, and 20% volcanic ash were 0.81, 0.71, 0.89, 1.02, and 0.52%, respectively. Treatment T1 and T4 gave significally different (P<0.05) to the control (T0) of P total. The P total that contained in organic fertilizer on the addition of 0, 5, 10, 15, and 20% volcanic ash was 1.52, 1.01, 1.48, 1.45, and 0.8%, respectively. Treatment T1 and T4 gave significally different (P<0.05) to the control (T0) of K total. The contents of K total that contained in organic fertilizer on the addition of 0, 5, 10, 15, and 20% volcanic ash were respectively 1.56, 1.18, 1.64, 1.53, and 0.82%. The dose addition of volcanic ash in treatment 10% (T2) and 15% (T3) was the best improved the chemical quality of organic fertilizer.