Presentation Information
[P04-579]Characteristics of Seaweed-based Biostimulant produced from Ulva sp. with Green Technology Approach
○Kustiariyah Tarman1,6, Muhammad Arief Budiman1, Elmi Nurhaidah Zainuddin2,7, Daniel Prajogo3, Rukman Hertadi4, Siti Nurkhamidah5 (1. Department of Aquatic Product Technology, Faculty of Fisheries and Marine Sciences, IPB University, Bogor 16680 (Indonesia), 2. Faculty of Marine Science and Fisheries, Hasanuddin University, Jln Perintis Kemerdekaan Km 10, Tamalanrea, Makassar 90245 (Indonesia), 3. Department of Management, Monash Business School, Monash University (Australia), 4. Biochemistry & Biomolecular Engineering Research Division, Faculty of Mathematics & Natural Sciences Institut Teknologi Bandung Jl Ganesha No Bandung 40132 (Indonesia), 5. Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111 (Indonesia), 6. Center for Coastal and Marine Resources Studies, International Research Institute for Maritime, Ocean and Fisheries, IPB University, Bogor 16144 (Indonesia), 7. Algal Biotechnology Research Group (ALBioRG), Hasanuddin University, Jln Perintis Kemerdekaan Km 10, Tamalanrea, Makassar 90245 (Indonesia))
Keywords:
phytohormones,marine algae,fermentation,Trichoderma,sustainable agriculture
[Purpose] This study investigates the efficacy of biostimulants derived from seaweed (Ulva)—processed through various methods—on the growth parameters of water spinach.
[Method] The biostimulants were produced using four primary treatments: soaking fresh Ulva, soaking dried Ulva, fermentation of fresh Ulva, and fermentation of dried Ulva using the marine fungal isolate Trichoderma harzianum KTR3.
[Results] Chemical analysis revealed that these biostimulants contain essential phytohormones, including auxin (Indole-3-acetic acid), cytokinins (kinetin and zeatin), and gibberellins, with the soaking of fresh seaweed yielding the highest concentration of auxin (7.865 mg/L). The application of these biostimulants was compared against negative controls, commercial fertilizers, and commercial biostimulants over a four-week period. Statistical analysis indicated that plant length of water spinach treated with the fermented dry biostimulant and commercial fertilizer groups recorded the highest growth. By the fourth week, the fermented wet biostimulant treatment showed a superior and statistically significant increase in root length (13.17 cm), outperforming the second-best treatment by 46.82%. For the vegetative growth of branch and leaf counts showed an overall increasing trend across all treatments.
[Consideration] The results suggest that Ulva-based biostimulants, particularly those processed via fermentation, serve as an effective organic alternative for enhancing the longitudinal and root growth of water spinach.
[Conclusion] It concludes that different treatment of biostimulant production and the fermentation period affect the biostimulant characteristics and its application in water spinach.
[Method] The biostimulants were produced using four primary treatments: soaking fresh Ulva, soaking dried Ulva, fermentation of fresh Ulva, and fermentation of dried Ulva using the marine fungal isolate Trichoderma harzianum KTR3.
[Results] Chemical analysis revealed that these biostimulants contain essential phytohormones, including auxin (Indole-3-acetic acid), cytokinins (kinetin and zeatin), and gibberellins, with the soaking of fresh seaweed yielding the highest concentration of auxin (7.865 mg/L). The application of these biostimulants was compared against negative controls, commercial fertilizers, and commercial biostimulants over a four-week period. Statistical analysis indicated that plant length of water spinach treated with the fermented dry biostimulant and commercial fertilizer groups recorded the highest growth. By the fourth week, the fermented wet biostimulant treatment showed a superior and statistically significant increase in root length (13.17 cm), outperforming the second-best treatment by 46.82%. For the vegetative growth of branch and leaf counts showed an overall increasing trend across all treatments.
[Consideration] The results suggest that Ulva-based biostimulants, particularly those processed via fermentation, serve as an effective organic alternative for enhancing the longitudinal and root growth of water spinach.
[Conclusion] It concludes that different treatment of biostimulant production and the fermentation period affect the biostimulant characteristics and its application in water spinach.
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