SYNERGY OF BAMBOO SHOOTS AND BANANA STEMS AS A SOURCE OF LIQUID ORGANIC FERTILIZER TO IMPROVE GENERATIVE GROWTH OF ARABICA COFFEE (Coffea arabica L.) Omay Sumarna, Karina Nur Syarafah, Soja Fatimah, Meita Annisa Nurhutami
Universitas Pendidikan Indonesia
Abstract
This study examines the effectiveness of liquid organic fertilizer (LOF) made from bamboo shoots (Dendrocalamus asper), banana stems (Musa paradisiaca L.), and a combination of the two on the generative growth of Arabica coffee (Coffea arabica L.). The LOF was produced through fermentation using EM4 and analyzed for macronutrient, micronutrient, organic carbon, and C/N ratio. The analysis showed that the LOF from bamboo shoots had the highest macronutrient content, while the LOF from banana stems had an excessively high C/N ratio (60.0). The combined LOF showed a more ideal C/N ratio (23.7), supporting efficient nitrogen uptake. The LOF application to coffee plants was carried out by spraying a solution (1:100) for eight fertilization applications at 10-day intervals. Observations showed that the combination of organic fertilizers (LOF) produced the highest number and diameter of fruit (24 fruits- 1.05 cm) and the highest growth rate constant (0.0159). Overall, all three types of LOF supported the formation of Arabica coffee fruit, with the combination LOF having a relative advantage in terms of nutrient balance and growth effectiveness
