Application of Seaweed Gracilaria verrucosa Tissue Culture using Different Doses of Vermicompost Fertilizer

摘要

Market demand on the need of agar in Indonesia continues to increase from year to year, so it takes seaweed cultivation technology to improve the quantity and quality of seaweed especially for Gracilaria verrucosa. The purpose of this research is to analyze the doses of vermicompost fertilizer for the quality of agar (viscosity, gel strength) and nutrient content (carbon, nitrogen and phosphorus) of G.verrucosa seaweed from tissue culture. This research was conducted in seaweed pond of Pangkah Kulon Village, Ujung Pangkah District, Gresik Regency, East Java, from April to July 2017. The experimental design used in this study was completely randomized design (CRD) with 6 treatments and repeated 3 times. The experimental treatment was a different dose of vermicompost fertilizer, consisting of 0 ppm (Treatment A), 400 ppm (Treatment B), 425 ppm (Treatment C), 450 ppm (Treatment D), 475 ppm (Treatment E) and a dose of 500 ppm (Treatment F). The results showed that the quality of agar viscosity (cps) was best in the treatment of 450 ppm dosage for 67 cps. The quality of agar gel strength (g/cm2) was best at treatment of 400 ppm dosage with a value of 77.2 g/cm2. While the nutrient content of seaweed G. verrucosa form of carbon (%) was best in treatment of 450 ppm dosage with a value of 25.74%, the content of nitrogen and phosphorus (%) was best at treatment of 400 ppm dosage with values of 2.02% and 0.26% respectively.