Peran Mikoriza Powder dan Granul dalam Meningkatkan Pertumbuhan dan Produksi Bawang Merah (Allium cepa var. aggregatum)

Beneficial Role of Mycorrhizal Powder and Granule in Improving Growth and Production of Shallot (Allium cepa var. aggregatum)

Abstract

Increasing productivity of shallots is carried out through proper fertilization including type, form, and dose of fertilizer. Mycorrhiza infects roots to form external hyphae that increase the plant’s ability to absorb nutrients so that the growth and development of the host plant become faster. Mycorrhizal biofertilizers can be applied in granular or powdered form to increase production. This research aims to analyze the application of powder and granules of mycorrhiza with different levels of NPK in increasing vegetative and generative phases of shallot. The experimental method was carried out using the Factorial Completely Randomized Design (CRD), the first factor of mycorrhiza type, and the second factor of NPK dosage. The treatment consisted of 12 levels, each replicated six times, resulting in a total of 72 polybags. Granules mycorrhiza + 50% NPK is the most effective combination increasing the highest plant height to reach 46 cm, and the most number of leaves is 39 strands/clumps. The maximum number of tubers was 11 pieces/crump produced by powder mycorrhiza without NPK, while wet and dry weight of the heaviest tubers by the granule mycorrhiza + 75% NPK treatment of 31 g and 13 g. Mycorrhiza is known to reduce the NPK need by 25% since maximum yield can be attained by adding 75% NPK fertilizer.

Keywords: bulb weight, number of bulbs, plant height, root infection, spore density