Use of Brown Seaweed Extracts as Bio-fertilizers and their Effects on the Carrageenan Yield, Ice-ice Disease Occurrence, and Growth Rate of the Red Seaweed Kappaphycus striatus

Kappaphycus striatus is one of the most important eucheumatoid species that widely farmed worldwide. In southern Philippines, where initial farm was established, sluggish growth brought about by poor quality planting materials and extensive farming resulting in unproductive farms frequent ice-ice outbreaks have been a hindrance increasing seaweed production. As result, farmers led to application inorganic fertilizers as nutrient enrichment for Kappaphycus. However, or chemical always pose negative impacts on environment. Hence, this study, preliminary investigation potential use extracts brown seaweeds Sargassum cristaefolium Turbinaria conoides bio-fertilizers tested K. their rate, carrageenan yield, disease occurrence. Seaweed liquid (SLE): S. (SC), T. (TC), combination SC TC (MX), control (C) were utilized striatus. SLE-enriched seedlings cultivated using fixed-off bottom method 45 days. Results revealed specific rates all SLE treatments significantly higher than no treatment at day 45. The percentage yield did not differ among treatments. Enrichment two selected before out-planting could improve while affecting occurrence yield. formulated from can be used cultivation.