Chemical Nutrient Content of Sargassum Liquid Fertilizer Produced from Shiphon-Connected Decomposers

This study was to analyze the micro- and macro-nutrient level of Sargassum liquid fertilizer (SFL) produced from siphon-modified decomposers and to evaluate their effects on the growth of Ipomoea aquatica. The twelve siphons are modified in various diameters, namely small (S), medium (M), and large (L), immersed height, 16 (code 1), 18 (2), 20 (3), and 22 cm (4), were set up to allow the gas-related byproducts of the decomposition translocating from the decomposer to an aeration cylinder. According to N, P, and K content of 1.47, 0.07, and 0.34%, respectively, decomposer L3 produced the most promising SFL compared to others. In addition, the liquid products exhibited better effects on the growth of I. aquatica including root length, total height, and freshness. As the modified siphon-like connectors may play role in the transportation of gas due to the modified force and pressure factors, the siphon-like tubes could be applied to improve the production of SFL.