PENGARUH PUPUK ORGANIK CAIR (POC) LIMBAH ORGANIK SEBAGAI LARUTAN NUTRISI TERHADAP PERTUMBUHAN TANAMAN KALE (Brassica oleracea var. acephala) PADA HIDROPONIK SISTEM WICK

THE EFFECT OF LIQUID ORGANIC FERTILIZER (POC) FROM ORGANIC WASTE AS A NUTRITION SOLUTION ON THE GROWTH OF KALE (Brassica oleracea var. acephala) IN THE WICK SYSTEM HYDROPONICS

Meningkatnya produksi limbah organik dan keterbatasan lahan di perkotaan mendorong pengembangan urban farming berbasis bahan organik lokal. Penelitian bertujuan mengetahui kualitas POC limbah foodcourt UNESA Ketintang serta pengaruh kombinasi POC dengan AB Mix terhadap pertumbuhan kale (Brassica oleracea var. acephala) pada hidroponik sistem wick. Penelitian terdiri dua tahap: deskriptif kuantitatif untuk uji N, P, K, dan C/N rasio POC, serta eksperimental dengan Rancangan Acak Kelompok terdiri dari 5 perlakuan dan lima ulangan. Data dianalisis dengan ANOVA satu arah, dilanjutkan uji Duncan 0,05. Hasil uji laboratorium menunjukkan N 0,42%, P 0,10%, K 0,67%, C-organik 3,13%, C/N rasio 7,45, belum memenuhi standar baku mutu. Kombinasi POC dan AB Mix berpengaruh signifikan terhadap seluruh parameter pertumbuhan. Konsentrasi POC 4 ml/L dan AB Mix 10 ml/L menghasilkan pertumbuhan terbaik: tinggi tanaman 19,16 cm, luas daun 60,10 cm², jumlah daun 15,14 helai, diameter batang 1,00 cm, panjang akar 25,20 cm, berat basah akar 6,40 gram, berat basah tanaman 28,00 gram. Senyawa bioaktif POC bersinergi meningkatkan efisiensi penyerapan hara AB Mix, menjadikannya suplemen nutrisi hidroponik yang ramah lingkungan.

The increasing production of organic waste and limited land in urban areas encourage the development of urban farming based on local organic materials. The study aims to determine the quality of food court waste POC UNESA Ketintang and the effect of the combination of POC with AB Mix on the growth of kale (Brassica oleracea var. acephala) in a hydroponic wick system. The study consisted of two stages: quantitative descriptive for the test of N, P, K, and C/N ratio of POC, and experimental with a Randomized Block Design consisting of 5 treatments and five replications. Data were analyzed by one-way ANOVA, followed by Duncan's test 0.05. Laboratory test results showed N 0.42%, P 0.10%, K 0.67%, C-organic 3.13%, C/N ratio 7.45, not meeting the quality standard. The combination of POC and AB Mix had a significant effect on all growth parameters. The concentration of POC 4 ml/L and AB Mix 10 ml/L produced the best growth: plant height 19.16 cm, leaf area 60.10 cm², number of leaves 15.14 pieces, stem diameter 1.00 cm, root length 25.20 cm, root wet weight 6.40 grams, plant wet weight 28.00 grams. The bioactive compounds of POC synergistically increase the efficiency of AB Mix nutrient absorption, making it an environmentally friendly hydroponic nutrient supplement.