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Aquaculture Aquatic Resource Management

The Application of Slow-Release Solid Organic Fertilizer on Kappaphycus alvarezii in a Low Nutrient Conditions Seaweed Farming Area

Jamaluddin Fitrah Alam
Department of Fisheries, Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar. Indonesia
https://orcid.org/0000-0002-5946-9423
Kasmiati
Department of Fisheries, Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar. Indonesia
https://orcid.org/0000-0001-6860-6285
Liestiaty Fachrudin
Department of Fisheries, Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar. Indonesia
https://orcid.org/0009-0008-2314-9939
Widyastuti Umar
Department of Marine Science, Faculty of Marine Sciences and Fisheries, Hasanuddin, University, Makassar. Indonesia
https://orcid.org/0000-0003-0763-6581
Alsry Mulyani
Regional Research and Development Planning Agency of South Sulawesi Province, Makassar, Indonesia
https://orcid.org/0009-0005-5975-1807
Rosmala Dewi Said
Regional Research and Development Planning Agency of South Sulawesi Province, Makassar, Indonesia
https://orcid.org/0000-0002-6174-7410
St. Suryani
Regional Research and Development Planning Agency of South Sulawesi Province, Makassar, Indonesia
https://orcid.org/0000-0001-6540-2607
Ade Wahyul Fajri Alimin
Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, Terengganu. Malaysia
https://orcid.org/0009-0000-2242-0215

Corresponding Author(s) : Jamaluddin Fitrah Alam

alamjamaluddin@unhas.ac.id

Jurnal Ilmiah Perikanan dan Kelautan, 2024: IN PRESS ISSUE (JUST ACCEPTED MANUSCRIPT, 2024)

Abstract

Graphical Abstract 



Highlight Research


1. Solid slow-release organic fertilizer is tested in low nutrient condition seaweed farming area


2. The fertilizer is effective to boost nutrient level in the water


3. The treatments showed different elution rate that affect the seaweed growth


4. Treatment with two holes effectively promotes the growth of seaweed


Abstrack


Deficiencies in nutrient concentrations have occurred in the coastal waters of Bantaeng Regency, South Sulawesi, Indonesia, where seaweed is farmed. This study, conducted in October-November 2021, aimed to investigate the effectiveness of fertilizer as a solution to low Kappaphycus alvarezii seaweed production caused by nutrient deficiencies in seawater. Fertilizer release was controlled through the configuration of holes in the plastic containers used, with three treatments (2, 4, and 6 holes) and an unfertilized area as a control. Nutrient release patterns and seaweed growth rates differed between treatments. The treatment with four holes gave high seaweed growth for five weeks, but growth decreased after the fertilizer was fully released in week 5, while the two holes treatment showed a steady increase in seaweed weight over the six-week study period. Seaweed absolute weight gain (mean±standard deviation) was 109±18, 91±6, and 80±11 g for 2, 4, and 6 holes, respectively, in the fertilized areas, and 88±5 g in the control area. Despite observed trends indicating improved growth with fertilizer application, differences between treated and control groups were not statistically significant, highlighting the complex interaction between nutrient supplementation and environmental factors affecting seaweed growth. Premature fertilizer depletion under the initially high-growth four and six hole treatments emphasizes the need for precision in managing fertilizer release rates. This research suggests the potential of optimized fertilizer application for improving seaweed cultivation under low nutrient conditions, while recommending nutrient level monitoring to ensure environmental sustainability.

Keywords

Nutrient Deficiency Seaweed Growth Seaweed Production Solid Fertilizer
Alam, J. F., Kasmiati, Fachrudin, L. ., Umar, W. ., Mulyani, A. ., Said, R. D. ., St. Suryani, & Alimin, A. W. F. . (2024). The Application of Slow-Release Solid Organic Fertilizer on Kappaphycus alvarezii in a Low Nutrient Conditions Seaweed Farming Area. Jurnal Ilmiah Perikanan Dan Kelautan. Retrieved from https://e-journal.unair.ac.id/JIPK/article/view/49305
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