Abstract
<p>Ground water spinach is one of the vegetable plants that has high economic and nutritional value. Soilless culture becomes an alternative in soilless crop cultivation by using substrate or water media. The purpose of this study was to determine the value of Electrical Conductivity (EC) of compound liquid fertilizer on vegetative growth and to found the best type of compound liquid fertilizer for ground water spinach. The research was conducted in the experimental garden of Faculty of Agriculture and Business, Universitas Kristen Satya Wacana, Salatiga, Central Java, with an altitude 500 meters above sea level. The study was conducted in June - July 2018. The study used an experimental method with a Randomized Block Design (RBD), consisting of 5 treatments with four types of fertilizers and one control (without fertilizer), each treatment was repeated 5 times. The types of fertilizers tested were AB mix (Inorganic), Hortigro A (Inorganic), Multitonic (Organic), and Supermes (Organic). The results showed that fertilization caused an increase in the EC value of hydroponic solutions. AB mix fertilizer (inorganic) with EC 1,58-2,32 mS / cm gives the best results on plant height (30.01 cm), number of leaves (8.1 strands), leaf area (13.16 cm2), diameter stems (5.63 mm), and top fresh weight (388.85 g).</p>
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