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

Abstract

This study aims to determine the effect of the Trichoderma spp bioactivator dose and NPK Phonska fertilizer 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 Randomized Design with two factors: bioactivator and NPK fertilizer. 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) fertilizer 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 fertilizer 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 fertilizer 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.