Pengaruh Dosis Pupuk Organik Cair Sabut Kelapa terhadap Pertumbuhan dan Hasil Bunga Kol (Brassica oleracea var. botrytis)
DOI:
https://doi.org/10.30737/jintan.v5i2.6Keywords:
Cauliflower, Coconut husk, Growth, LOFAbstract
Cauliflower (Brassica oleracea var. botrytis) is a vegetable that rich in essential nutrients, including proteins, vitamins, fiber, and minerals such as calcium, iron, magnesium, phosphorus, and zinc. To support its growth and productivity, this plant requires adequate availability of nutrients, particularly potassium. A potential natural source of potassium is coconut husk, which can be processed into liquid organic fertilizer (LOF). This study aims to evaluate the effect of coconut husk LOF application on the growth and yield of cauliflower. The experiment was conducted using a Completely Randomized Design (CRD) with a non-factorial arrangement, comprising six LOF dosage treatments: D0 = 0 ml/plant, D1 = 40 ml/plant, D2 = 80 ml/plant, D3 = 120 ml/plant, D4 = 160 ml/plant, and D5 = 200 ml/plant, each replicated four times in duplicate. The LOF was applied by drenching the planting medium. Observed parameters included plant height, number of leaves, leaf area, curd diameter, volume, and weight. The results indicated that coconut husk LOF application did not significantly affect cauliflower's growth and yield parameters. However, the fertilizer dosage significantly affected the number of leaves at 30 days after planting. Overall, the applied dosages were insufficient to optimally support cauliflower growth and yield, suggesting that further research is needed with higher concentrations of coconut husk LOF.
Bunga kol (Brassica oleracea var. Botrytis) merupakan salah satu jenis sayuran yang kaya akan nutrisi penting, seperti protein, vitamin, serat, serta mineral termasuk kalsium, zat besi, magnesium, fosfor, dan seng. Untuk mendukung pertumbuhan dan produksinya, tanaman ini memerlukan ketersediaan unsur hara, khususnya kalium. Salah satu sumber kalium alami yang potensial adalah sabut kelapa, yang dapat diolah menjadi pupuk oganik cair (POC). Penelitian ini bertujuan untuk mengetahui pengaruh pemberian POC sabut kelapa terhadap pertumbuhan dan hasil tanaman bunga kol. Penelitian dilaksanakan menggunakan Rancangan Acak Lengkap (RAL) non-faktorial dengan enam perlakuan dosis POC (D0 = 0 ml/tanaman, D1 = 40 ml/tanaman, D2 = 80 ml/tanaman, D3 = 120 ml/tanaman, D4 = 160 ml/tanaman, D5 = 200 ml/tanaman), masing-masing diulang empat kali secara duplo. POC diberikan melalui metode penyiraman ke media tanam. Parameter yang diamati meliputi tinggi tanaman, jumlah daun, luas daun, diameter bunga kol, volume bunga kol, dan berat bunga kol. Hasil penelitian menunjukkan bahwa pemberian POC sabut kelapa tidak memberikan pengaruh yang signifikan terhadap parameter pertumbuhan dan hasil panen bunga kol. Namun, perlakuan dosis pupuk menunjukkan pengaruh nyata terhadap jumlah daun pada umur 30 hari setelah tanam. Secara umum, dosis yang digunakan dalam penelitian ini belum mampu mendukung pertumbuhan dan produksi bunga kol secara optimal, sehingga diperlukan penelitian lanjutan dengan peningkatan dosis POC sabut kelapa.
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