PURNAWANTO, Agus Mulyadi (2021) Perbaikan Ultisol dengan Aplikasi Vermikompos Limbah Baglog dan Pupuk Fosfor terhadap Karakter Morfo-Fisiologi, Hasil dan Komponen Hasil Jagung. Doctoral thesis, Universitas Jenderal Soedirman.

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Abstract

This study aims to obtain information about (1) the ability of Eudrilus eugeniae, Eisenia fetida and Lumbricus rubellus as baglog waste decomposers without additional materials, (2) the vermicompost quality of baglog waste, and (3) the impact of the application of vermicompost baglog waste and phosphorus fertilizer on morpho-physiology characters, yield and yield components of maize in Ultisols. The first and second studies were conducted using a Randomized Completely Block Design. The first study treatments were E. eugeniae, E. fetida, and L. rubellus with initial weights of 42, 84, 126 and 168 g, respectively. The variables observed included temperature, humidity, pH, C-organic, N-total and C/N ratio. The second study was an analysis of the quality of vermicompost as a result of the first study which observed the levels of N, P, K, Fe, Mn, Zn, Pb, Cd, Humic Acid, cellulase enzyme activity, E. coli, N-fixing microbes and phosphate solubilizing microbes population. The third research was conducted using a Split Split Plot Design. The main plots were maize varieties Madura 3 and Sukmaraga. Subplots were phosphorus fertilizer doses consisting of 0, 100, 200, and 300 kg P2O5 ha-1 equivalent to 0; 0,58; 1,17 and 1,75 g P2O5 pot-1. The Sub Subplots were the vermicompost doses of E. eugeniae, E. fetida and L. rubellus, respectively 0, 15, 30 and 45 tons ha-1 equivalent to 0; 87,5; 175 and 262,5 g pot-1. The variables observed were morpho-physiological characters, yield and yield components of maize. The results showed that the worms E. eugeniae, E. fetida and L. rubellus, were able to decompose baglog waste even without additional materials with vermicompost quality according to the compost quality standards prevailing in Indonesia and several countries in the world. The application of vermicompost 262,5 g pot-1 (equivalent to 45 t ha-1) at various doses of phosphorus fertilizer was able to improve Ultisols and produce optimal morpho-physiological characters of maize with yields of maize varieties Madura 3 94,8 g plant-1 equivalent to 4,88 t ha-1 and the Sukmaraga variety yielded 106,1 g plant-1 equivalent to 5,46 t ha-1.

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