The Effect Of Combination Of Granular Organic Fertilizer (Gof) And An Organic Fertilizer On Maize Growth And Production

Abstract

Continous use of inorganic fertilizer causes a negative impact on soil production. Efforts to reduce the high dependence of farmers on the cheapest inorganic fertilizers are the addition of organic fertilizers. The purpose of this study was to determine the effect of the use of organic fertilizer in granular form (GOF) combined with inorganic fertilizer on the growth and yield of maize. The study was conducted in Garang Tiga Village, Simbang District, Maros Regency, South Sulawesi, in November 2018-February 2019 using a Randomized Block Design with 4 replications. The treatments consisted of without fertilization (as control), Urea 400 kg ha-¹+SP-36 100 kg ha^-1+KCl 50 kg ha^-1 (based on recommendations), GOF 100 kg ha^-1, Urea 300 kg ha^-1 + SP-36 75 kg ha^-1 + KCl 37.5 kg ha^-1 + GOF 50 kg ha^-1, Urea 300 kg ha-1 + SP-36 75 kg ha ^-1 + KCl 37.5 kg ha^-1 + GOF 100 kg ha^-1,  Urea 300 kg ha^-1 + SP-36 75 kg ha^-1 + KCl 37.5 kg ha^-1 + GOF 150 kg ha ^-1, and Urea 400 kg ha^-1 + SP-36 100 kg ha^-1 + KCl 50 kg ha^-1 + GOF 100 kg ha^-1. The results showed that the combination of GOF with inorganic fertilizers could increase plant growth and maize yields. The optimum dose was achieved at Urea 300 kg ha^-1 + SP-36 75 kg ha^-1 + KCl 37,5 kg ha^-1 + GOF 100  kg ha^-1 and yielded 8.05 tons of shelled corn ha^-1 with an IBCR ratio of 2,30.