Liquid fertilizer formulation is based on cow urine and its concentration for maize in Indonesia

This study aims to obtain liquid organic fertilizer (bio-urine) according to the Agriculture Ministry Regulation 70/2011 and determine the bio-urine concentration for maize. The research conducted was on Pesawaran Regency, in Lampung Province, Indonesia, from April 2017 to February 2018. The treatments tested were types four bio-activators and four enrichment materials. The design used was randomized blocks design in a split-plot pattern and three replications. The material above was fermented for four weeks anaerobically and analyzed in the laboratory. The value of the analysis compared with the standard and that close met the requirements, then produced in sufficient quantities for use in field research. The results showed that the bio-urine formulations tested did not meet the technical requirement yet, especially N, P, and K, so research needs to continue. Bio-urine with C content close to the standard is fermented cow urine with bio-activator Agrodeko and added molasse and pineapple enrichment materials. For pH and harmful microbes, these formulas have met the requirements. Apart from that, bio-urine also contains growth hormones of Indole acetic acid and Gibberellin acid. The concentration of bio-urine has no significant effect on the growth and yield of maize. It needs further research with narrow interval concentrations.