The result of Gracilaria verrucosa quality by using liquid fertilizer Ulva sp. The result of the research shows that there are apparent differences between the tested treatment ( p < 0.05) on Gracilaria sp., growth, and the highest testing on giving liquid fertilizer Ulva sp.
Based on laboratory testing result, it shows that organic fertilizer which has good potency by looking at N, P, and K contents is organic fertilizer Ulva sp., with content of N (0.45 mg/L), P (7.67 mg/L), and K (11.06 mg/L). Several noneconomic seaweeds ( Codium sp., Ulva sp., Padina sp., Amphiroa sp.) are found in waters area of Sulawesi Tengah. Moreover, the fertilizer is tested on Gracilaria verrucosa. The hormone growth of generated urea and seaweed liquid fertilizers is analyzed, including auxin, gibberellin, cytokinin, as well as nutrient (macro and micro). The specific target of this research is to analyze the effectivity of an-organic fertilizers (urea) with seaweed-based liquid organic fertilizer. By utilizing inexpensive and bioecologically beneficial material, it is expected to increase the growth, production, and repair the quality of Gracilaria verrucosa. The aim of this research is to analyze potency and generate organic fertilizer with noneconomic seaweed as material which is bioecologically environment-friendly to stimulate Gracilaria verrucosa production.
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