Application of Mangrove Leaf Fermentation (Avicennia marina) and (Rhizophora mucronata) in Red Seaweed (Kappaphycus alvarezii) Production in Nunukan, North Kalimantan

Abstract

Avicennia marina and Rhizophora mucronata mangrove leaf fermented liquid is a potential method for controlling ice-ice illness and speeding up the growth of red seaweed. The research was conducted in Nunukan Regency, North Kalimantan, from February to May 2024, using an experimental method through field-scale trials involving red seaweed (Kappaphycus alvarezii). Completely Randomized Design was used for this study. The control treatment involved no immersion in fermentation liquid, while treatment A used the fermentation liquid of Avicennia marina, treatment B used Rhizophora mucronata, and treatment C used a 50% mixture of both Avicennia marina and Rhizophora mucronata liquids. The results indicated that the application of Avicennia marina fermentation liquid had a significantly greater effect on seaweed growth compared to the application of Rhizophora mucronata fermentation liquid.