Abstract :
This research has been carried out in the Experimental Garden of the Faculty of Agriculture, Riau Islamic University, Jalan Kaharuddin Nasution KM 11, Air Dingin Village, Bukit Raya District, Pekanbaru City. The time of this research was carried out for three months which was calculated from July to September 2019. The purpose of this study was to determine the interaction and main effects of vermicompost fertilizer and NPK 16:16:16 fertilizer on the growth and production of okra and shallots in the intercropping system . This research uses a completely randomized factorial design consisting of two factors. The first factor is the provision of vermicompost (K) consisting of 4 levels namely 0, 750, 1500 and 2250 g / plot and the second factor is NPK 16:16: 16 (N) consisting of 4 levels namely 0, 15, 30 and 45 g / plot, so that obtained 16 treatment combinations with 3 replications there are 48 experimental units. Each unit consists of 4 plants per plot and 2 plants are sampled so that the whole plant is 192 plants for okra plants and 5 plots for shallots and 2 plants as samples so that the overall plant is 240. Based on the results of research that has been conducted concluded that: Intercropping planting systems on okra and shallots produce growth and production of plants that are smaller than monocultures. The interaction of vermicompost fertilizer and NPK 16:16:16 fertilizer was not significant on all observational parameters. The main effect of vermicompost fertilizer doses was evident on all observational parameters. The best treatment is the dose of vermicompost fertilizer 2250 g / plot. The main effect of the 16:16:16 NPK dose is evident on all observational parameters. The best treatment is NPK 16:16:16 45 g / plot.