Main Article Content
Black rice (Oryza sativa L. Cempo Ireng) is one of the rice varieties that are rich in nutrients viz. anthocyanin, flavonoids, vitamin B1and E, Fe and amino acids. In Indonesia, utilization of nutrients in the black rice is still limited due to low productivities and its cultivation is also not well known. An alternative natural fertilizer that can improve the productivity of black rice is organic KCl fertilizer derived from coconut husk. The current study aimed to analyze the effect of organic KCl fertilizer on the morphological growth of black rice including stem height, number of leaves, number of tillers, and time of panicle out. The research was carried out in a greenhouse using a Completely Randomized Design (CRD) single factor (concentration of organic KCl fertilizer) with five treatments levels: 0 ml (P0) as control, 20 ml (P1), 40 ml (P2), 60 ml (P3) and 80 ml (P4). All experiments were performed in five replications. Application of KCl fertilizer on the growth of black rice was given at three different times i.e. at 0 day after sowing (DAS), 7 DAS, 21 DAS and the transition time of vegetative to generative phase. The data obtained were analyzed using Analysis of Variance (ANOVA) and continued by Duncan's Multiple Range Test (DMRT) at a 95% confidence level. The results showed that the application of KCl fertilizer at concentration of 20 ml/L had the significant effect on the plant height, number of tillers, number of leaves, and time of panicle out. The organic KCl fertilizer at concentration of 20 ml/L has increased the growth of 31.8 %, the number of tillers by 19 %, the number of leaves by 100%. Therefore, this study presents an alternative organic fertilizer that would enhance productivity of plant, as a result would contribute to strengthen national food and also minimize environmental pollution.