Ahmad Khanafi, Yafizham, and D.W. Widjajanto*
Ecology and Crop Production Laboratory, Department of Agriculture, Faculty of Animal and Agricultural Sciences, Diponegoro University, Semarang 50275 – INDONESIA
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The experiment was aimed to investigate the effectiveness of bio-slurry and inorganic fertilizer combination on the performance of two rice varieties. A completely randomized design of factorial pattern was used throughout the experiment. The first factor was the combination of bio-slurry and NPK fertilizer that consisted of P0 : no added fertilizer, P1 : NPK fertilizer only, 550 kg/ha; P2 : bio-slurry 2.3 tons/ha + NPK fertilizer 400 kg/ha; P3 : bio-slurry 4.6 tons/ha + NPK fertilizer 250 kg/ha; P4 : bio-slurry 6.9 tons/ha + NPK fertilizer 100 kg/ha; and P5 : bio-slurry only, 8.5 tons/ha. Treatments were applied based on nitrogen recomended doses of rice, 165 kg N/ha. The second factor was rice varieties that consisted of V1 : IR-64 and V2 : Ciherang. Each treatment was repeated three times. Parameters observed were plant height, number of tillers, weight of 1,000 grains, and rice production. Data were statistically analyzed using ANOVA and followed by Duncan’s Multiple Range Test. On the basis of the experimental results it was concluded that bio-slurry may replace the role of inorganic fertilizer in rice production, especially IR-64 and Ciherang varieties.