EFFECT OF GIVING LIQUID ORGANIC FERTILIZER FROM PINEAPPLE PEEL WASTE AND COCONUT HUSK WASTE AS A PARTIAL SUBSTITUTION OF AB MIX NUTRITION FOR PLANT GROWTH AND YIELD KALE (Brassica oleracea) ON SYSTEM NFT HYDROPONICS

Abstract

The amount of agricultural land in Bandar Lampung City has decreased by around 40.15%, from 10,435.44 ha to 6,244.62 ha. Hydroponic cultivation is one of the urban farming programs that is widely known by the public because of the very limited characteristics of urban land. Utilization of waste into liquid organic fertilizer offers a sustainable solution to the problem of agricultural waste and can minimize waste volume and reduce air pollution. The use of LOF is one of the innovations to reduce production costs because by reducing the cost of purchasing production inputs, farmers' potential profit margins can increase. Furthermore, utilizing local raw materials for POC production can also improve distribution cost efficiency and strengthen farmers' independence in managing their agricultural businesses. This study used a completely randomized design (CRD) with a total of 4 nutrient treatments. There were 6 replications with 24 experimental units. The findings of this research suggest that treatment P4 demonstrates the most effective results, namely 75% AB mix + 25 LOF pineapple peel and coconut husk. The use of 25% liquid organic fertilizer pineapple peel and/or coconut husk with 75% AB mix has results that are not significantly different or can match the treatment of 100% AB mix nutrients. The results of the percentage comparison of the wet weight of the kale plant canopy between the substitution of 25% LOF pineapple peel and/or coconut husk with 100% AB mix treatment, namely 75% AB mix + 25% LOF pineapple peel and coconut husk (102,3%), treatment 75% AB mix + 25% LOF coconut husk (99,7%), treatment 75% AB mix + 25% LOF pineapple peel (79,9%).