Effect of Bioactivator Dosage Trichoderma Spp. and Phonska NPK Fertilizer on Growth and Yield of Onion (Allium Ascalonicum L.) in Dry Land
Effect of Bioactivator Dosage Trichoderma Spp. and Phonska NPK Fertilizer on Growth and Yield of Onion (Allium Ascalonicum L.) in Dry Land

Summary/Abstract: This study aims to determine the effect of the Trichoderma spp bioactivator dose and NPK Phonska fertiliser on the growth and yield of shallots (Allium ascalonicum L) in dry land. This research used an experimental method with pot trials at the Screen House. The experiment will be designed using a Completely Randomised Design with two factors: bioactivator and NPK fertiliser. The activator dosage factor (B) consists of 3 levels, namely: b1 (1.25 t/ha equivalent to 5 g/plant); b2 (2.50 t/ha - 10 g/plant); b3 (3.75 t/ha - 15 g/plant). The NPK (P) fertiliser factor consists of 4 levels, namely P1 (25% recommended dose), P2 (50% recommended dose), P3 (75% recommended dose), P4 (100% recommended dose). The results showed that administration of Trichoderma spp bioactivator significantly affects shallots' growth and production parameters with the best 15 gr/plant dose. Likewise, the application of NPK fertiliser has a real influence on the growth parameters and production of shallots with the best dose of 1.6 g/plant. Statistically, there was no interaction between the administration of Trichoderma spp bioactivators and the giving NPK fertiliser to various observation variables: plant height, number of leaves, number of tillers (tubers), wet tuber weight, dry tuber weight, and number of Trichoderma spp bioactivator populations.

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