PENGARUH PEMBERIAN PUPUK UREA DENGAN DOSIS BERBEDA TERHADAP PERTUMBUHAN RUMPUT LAUT (Caulerpa lentillifera)

Abstract

This study aims to determine the effect of different doses of urea fertilizer on the growth of seaweed (Caulerpa lentillifera). The research utilized a Completely Randomized Design (CRD) with four treatments and three replications: treatment A (control without urea fertilizer application at 0 mg/L), treatment B (urea fertilizer application at 27 mg/L), treatment C (urea fertilizer application at 47 mg/L), and treatment D (urea fertilizer application at 67 mg/L). The parameters tested were absolute growth rate and specific growth rate. Data analysis was conducted using ANOVA. Seaweed (Caulerpa lentillifera) specimens, with an average weight of 200 g (totaling 2,400 g), each of 200 g samples were placed in aquariums sized 40x40x35 cm and maintained for 35 days. The absolute growth rate obtained for treatment A (without fertilizer application) was -111 g, for Treatment D was -115 g, for treatment C was -129.3 g, and the lowest was observed for treatment B at -135.7 g. The specific growth rate obtained for treatment A (without fertilizer application) was -2.68 g, for treatment D was -2.74 g, for treatment C was -3.00 g, and the lowest was observed for treatment B at -3.28 g. Based on the results of the ANOVA test, it can be concluded that the addition of urea fertilizer at different doses did not have a significant effect (P>0.05) on the absolute growth rate and specific growth rate of the seaweed (Caulerpa lentillifera).