Characteristics of Liquid Organic Fertilizer Made from Milkfish Viscera (Chanos chanos Forsskal) at Differents Long Time Fermentation

Abstract

Fish viscera contains nutrients consisting of protein, lipid, and minerals that can be used to stimulate plant growth. Milkfish visceral waste is one type of material that can be used as organic fertilizer. The aim of this research was determining the effect of different fermentation times on the liquid organic fertilizer derived from milkfish viscera waste on the growth rate of purple eggplant (Solanum melongena). Samples of milkfish viscera were reduced in size using a blender.  The milkfish viscera were cooked to a temperature of 100°C was done to sterilize microbes. Homogenization was also carried out with the addition of water (1:2), 5% molasses, and Trichoderma sp. at a concentration of 100 g/L. The fermentation process was conducted for 7 days, 10 days, 13 days, and 16 days, respectively. ANOVA analysis and Tukey's test revealed that different fermentation durations resulted in significant differences in pH, yield, c-organic, nitrogen, potassium, plant wet weight, root length, plant height, number of leaves, leaf width and stem diameter but did not significantly differ in phosphorus. A duration of 16 days yielded the highest values for pH (5.80), c-organic (4.46%), nitrogen (0.34%), phosphorus (0.06%), potassium (0.59%), plant wet weight (58.67 grams), root length (36.50 cm), plant height (25.67 cm), number of leaves (10.00), leaf width (15.07 cm), and stem diameter (8 .00 mm).