The utilization of seaweed-based liquid organic fertilizer to stimulate Gracilaria verrucosa growth and quality
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ORIGINAL PAPER
The utilization of seaweed‑based liquid organic fertilizer to stimulate Gracilaria verrucosa growth and quality Nasmia1 · E. Rosyida1 · A. Masyahoro1 · F. H. A. Putera1 · S. Natsir2 Received: 17 May 2020 / Revised: 29 July 2020 / Accepted: 1 September 2020 © The Author(s) 2020
Abstract 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. By utilizing inexpensive and bioecologically beneficial material, it is expected to increase the growth, production, and repair the quality of Gracilaria verrucosa. The specific target of this research is to analyze the effectivity of an-organic fertilizers (urea) with seaweed-based liquid organic fertilizer. The hormone growth of generated urea and seaweed liquid fertilizers is analyzed, including auxin, gibberellin, cytokinin, as well as nutrient (macro and micro). Moreover, the fertilizer is tested on Gracilaria verrucosa. Several noneconomic seaweeds (Codium sp., Ulva sp., Padina sp., Amphiroa sp.) are found in waters area of Sulawesi Tengah. 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). The result of the research shows that there are apparent differences between the tested treatment (p 1 kg wet), as presented in Table 1.
Fig. 1 The average of absolute growth of Gracilaria verrucosa
Absolute growth of Gracilaria verrucosa seaweed Ulva sp. seaweed shows higher nutrient content than other seaweed types. Consequently, this seaweed is chosen as organic fertilizer material for Gracilaria verrucosa cultivation, and as a comparison, an-organic commercial fertilizer is used. The result of the research with different fertilizer applications (liquid fertilizer Ulva sp. and urea fertilizer) and without fertilizer given shows different absolute growth on Gracilaria verrucosa seaweed, as it can be seen in Fig. 1. The result of analysis of variance (Anova) on absolute weight growth of Gracilaria verrucosa seaweed on various treatment in conservation media shows significant result (p
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