Kajian Penambahan Bakteri Asam Laktat dan Kompos Tithonia Diversifolia terhadap Penurunan Toksisitas Al pada Berbagai Waktu Inkubasi di Ultisol Jumantono

Tittle : The Examine of Adding Lactic Acid Bacteria and Tithonia Diversifolia Compost on Decreasing Al Toxicity The Several of Time Incubation in Ultisol Jumantono. The purpose of this experiment is to know decreasing of Al toxicity with adding Lactic Acid Bacteria and Tithonia diversifolia compost on ultisols. The research was conducted in the Green House and Soil Chemistry Fertility Laboratory of Agriculture Faculty of Sebelas Maret University Surakarta.This research is designed experimental and using Completely Randomize Design (CRD) by single experiment, consist of 22 treatments with three replications, combination of Tithonia : 0 ton/ha, 2 ton/ha, and 3 ton/ha, Lactic Acid Bacteria : 0 %, 10 % and 20 %, and then SP-36 fertilizer : 0 kg/ha, 50 kg/ha, 100 kg/ha and 150 kg/ha. Variables observation are primary variables (Aldd, Al active and Al total), and secondary variables (pH, organic mater, available P). Statisticals analysis used F-Test, Kruskal-Wallis Test, Correlation Test, Mood Median Test and DMRT 5 %. This experiment showed that adding of Lactic Acid Bacteria, Tithonia diversifolia compost and P fertilizer are have significant effect to Aldd, active Al and Al total in Ultisols. The time that decreas Aldd and Al active significanly is 30 inkubation, as Al total to low is 50 inkubation. The best experiment to decreas Al is Tithonia 2 ton/ha + BAL 20% from compost + SP-36 fertilizer 100 kg/ha