Hubungan Dosis Pupuk NPK Plus dan Kapur Dolomit terhadap Produksi Bawang Merah (Allium Ascalonicum L) pada Lahan Gambut di Kabupaten Nias Utara

Abstract

Most of North Nias Regency is peatland, which is used primarily for rice, rubber and coconut crops. Until now there have been no shallot cultivation activities in North Nias Regency. This study aims to prove the role of dosing NPK Plus fertilizer and Dolomite lime on shallot (Allium ascalonicum L.) cultivation on peatlands in Lafau Village, North Nias Regency. The research used a Randomized Group Design (RAK) with two factors and three blocks. The first factor was the dose of NPK fertilizer with levels of: 0, 250, 500, and 750 (kg/ha). The second factor is Dolomite lime with levels: 0, 1.5, 3.0, and 4.5 (tons/ha). The results showed that the application of NPK Plus fertilizer was able to increase the wet weight of the crown and wet weight of shallot bulbs. The highest yield was obtained at a dose of 750 kg/ha. The higher the NPK fertilizer, the higher the yield but the response curve is still linear. Dolomite lime can increase the wet weight of bulbs, dry weight of bulbs, number of tillers, and grading quality of bulbs. The highest yield was obtained at a dose of 4.5 tons/ha. The more dolomite lime is applied, the higher the yield but the response curve is still linear. The interaction of the two treatments between NPK fertilizer and dolomite lime did not affect the parameters observed.