Pengaruh Pemberian Pupuk Kalium terhadap Kualitas Dua Varietas Ubi Jalar (Ipomoea batatas L.)

Marchel Putra Garfannsa, Sudiarso Sudiarso, Nur Edy Suminarti

Abstract

Indonesia, yang merupakan negara tropis, ubi jalar dapat tumbuh di hampir semua pulau di Indonesia. Ubi jalar memiliki berbagai varietas. Tanaman ubi jalar dikenal sangat responsif terhadap potasium. Diharapkan melalui penelitian ini akan diperoleh informasi tentang proporsi pupuk kalium yang tepat dalam setiap varietas yang diuji sehingga produktivitas tanaman ubi jalar dapat ditingkatkan. Eksperimen menggunakan Split Plot Design diulang tiga kali. Petak utama adalah Varietas (V), seperti Variasi Gunung Kawi dan Varietas Cilembu. Sub plot adalah Dosis KCl (K) yang terdiri dari 5 jenis seperti, K0 = 0 kg ha-1, K1 = 78 kg ha-1, K2 = 137 kg ha-1, K3 = 196 kg ha-1 dan K4 = 225 kg ha-1. Hasil observasi dianalisis dengan uji varians (uji F) pada level 5% dan 1%. Jika ada perbedaan yang signifikan, akan dilanjutkan dengan uji BNJ pada level 5% dengan korelasi dan uji regresi. Hasil penelitian menunjukkan, bahwa pemberian pupuk kalium dapat mempengaruhi kualitas dari tanaman ubi jalar kedua varietas. Pemberian kalium 225 kg ha-1  mampu meningkatkan kadar serat umbi sebesar 35% namun berdampak pada pengurangan kandungan klorofil sebesar 14%.

Keywords

kalium; kualitas; pupuk; ubi jalar; varietas

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DOI: https://doi.org/10.37637/ab.v4i2.692

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