Respon Tanaman Bawang Merah terhadap Pemberian Pupuk Mikro Majemuk Mn, Cu, Zn, dan B, pada Tanah Inceptisol Tegal

Abstract

Fertilizer is one of the essential agricultural inputs to increase crop productivity. Until recently the use of fertilizers on shallot crop prefers nutrient NPK, so that in the long term there will be deficient in trace elements due to be transported by the crop at harvest.Research conducted at center of the shallot in Tegal regency. The aim of research to determine the effect of compound micro fertilizer Mn, Cu, Zn and B to the shallot crop. Research used randomized complete block design consists of eight treatments with three replications. Treatments consists of: control, NPK fertilizer (urea 400kg / ha, 250 kg of SP- 36 / ha and 175 kg KCl / ha), NPK + 0.5 g/l Micro-Compound fertilizer, 5 level dose of micro compound fertilizer: 0.5; 0.75; 1; 1.25 and 1.50 g / l combined with ¾ dose NPK fertilizer. Parameters measured were plant height, number of tillers, shallot wet and dry, a value RAE, and analysis of farming (IBRC). The results showed Micro Compound fertilizer on shallot crop can increase the number of tillers (bulb), the result of wet and dry shallot. Micro Compound fertilizer dose of 0,75g/l combined with ¾ dose NPK fertilizer agronomically higher effectiveness compared to NPK fertilizer with a value RAE 134%. The optimum dose of Micro Compound fertilizer on Inceptisol Tegal with moderate fertility levels was 0.85 g/l combined ¾ dose NPK fertilizers. Micro Compound fertilizer use on InceptisolTegal is economically profitable to the IBCR value> 1, the highest profit achieved at a dose of 0,75 g/l with a value IBCR 30. Keywords: micro compoud fertilizer, NPK fertilizer, shallot, inceptisol