Effectiveness of NPK fertilizer on the growth of several new superior upland rice lines (Oryza sativa L.) crosses from Southeast Sulawesi

Rice is the primary source of carbohydrates in Indonesia. The rice demand increases every year and needs to fulfil sustainably. Effective fertilizer treatment is very important. The study aimed to determine the effectiveness and the best dosage of NPK on the growth of several superior upland rice lines from Southeast Sulawesi. The research was conducted in Field Experiment Faculty of Agriculture, Halu Oleo University. The research design in factorial randomized block design (RBD) consists of two factors. The first factor was the rice cultivar different, i.e., GS11-2 (G1), GS12-2 (G2), GS44-2 (G3), GS16-2 (G4), and Lipigo 4 as a check variety or control. The second factor was the different dose of NPK, i.e., without fertilizer as a control, 4 g plant^-1, and 8 g plant^-1. The observed parameter is plant height (cm), leaf number and tiller number. The observational data were analysed using ANOVA dan further using DMRT tests. The results showed NPK fertilizer was effective on the growth of several upland rice lines in the parameter of plant height, leaf number, and tiller number. The four lines tested showed that these lines had the potential to become new superior upland rice varieties.