Efektifitas Berbagai Dosis Bio-Slurry Sebagai Bumbu Kompos Terhadap Waktu Pembentukan dan Kualitas Kompos di Dusun Gadingharjo, Donotirto, Kretek, Bantul

Abstract

Organic waste yielded from households in Gadingharjo Village have not been yet treated pro-perly. The utilization that can be implemented is composting. One of activators that can accele-rate the processing time and improve the quality of the compost is bio-slurry. The aim of this research is to know the effectiveness of bio-slurry as compost activator by conducting a post-test-with-control-group designed experiment. The amount of domestic waste that was treated were 75 kg and were obtained with non-random sampling technique. The time of composting formation were counted from the initial process until the compost were mature, based on the following criteria: blackish brown color, soiled smells, and has environment stable temperature. The measurement of N, P, and K substance were carried on at the laboratory of BBTKL Yogya-karta. In the control group, the mean composting time was 34,7 days, meanwhile in the treat-ment groups of 1:1:2; 1:1:3 and 1:1;4 it was 25,3 days, 27,3 days, and 29,7 days. The result of one way anova test obtained p value < 0,001 which is meant that the differences were signifi-cant. The average of N, P, and K concentrations in the control group were 1,0438 %; 0,1880 %; and 1,4045 %. Meanwhile, in treatment group of 1:1:2 they were: 1,4639 %; 0,2699 %; and 1,2320 %; in treatment group of 1:1:3 they were: 1,0465 %; 0,2707 %; and 1,3154 %; and in treatment group of 1:1:4 they were: 0,8865 %; 0,2285 %; and 1,2992 %; respectively. To con-clude, bio-slurry can be used as an activator to speed-up the composting time and to improve the compost quality. The most effective bio-slurry addition is 1:1:2 ratio .