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Fertilizer plays an essential role in supporting the Indonesia Food Resilience Program. Nowadays, biological fertilizer has increasingly used to optimize the uptake of nutrients in the soil by plants. The purpose of this research was to obtain the most appropriate composition of biological fertilizer in increasing rice productivity of irrigated land. The experiment was conducted in the irrigation area of Punimbe subviullages (location 1) and Bageq Nunggal sub-village (location 2) of Ubung Village, Jonggat District, Central Lombok Regency of West Nusa Tenggara at the dry season I (April-June 2017). Different biofertilizers were applied in each location, namely Biophosphate for location 1 and Ecofert for location 2, both of which play an N and solvent P. Inorganic fertilizer of urea fertilizer and NPK Phonska were applied based on the recommendation of integrated plant calendar (KATAM) for the District of Jonggat which was 200 kg/ha for each Urea and NPK Phonska (15:15:15). The experiment was arranged with a randomized block design for five treatments and repeated five times. The five treatments were: 100% treatment recommended dose of Bio-Phosphate (BP 4) and ecofert (Eco 4) equivalent to 50 kg/ha; 75% recommended dose or equivalent to 37,5 kg/ha (BP 3 and Eco 3); 50% recommended dose or equivalent to 25 kg/ha (BP 2 and Eco 2); 25% recommended dose or equivalent to 12,5kg/ha (BP 1 and Eco 1); and without the use of biological fertilizers as a control (BP 0 and Eco 0). The result showed that there were significant differences between rice crops given ecofert and control at the vegetative stage, but at generative parameters has showed no significant difference effect except on the grain weight. The highest yield was obtained from the treatment of P2, which was giving 75% Ecofert dosage. |
