CD Skripsi
Pengaruh Pemberian Urea Dengan Berbagai Dosis Terhadap Pertumbuhan Sel Skeletonema Costatum
ABSTRACT
This research was conducted in March 2020 at BPBALP Teluk Buo, West
Sumatera. This research aimed to determine the best dose for urea usage on S.
costatum cell growth. The method used in this research was an experimental
method using Completely Randomized Design (CRD) with one factor, which was
the various doses of urea fertilizer consisting of five treatments with three
replications. Urea various doses used were 0 ppm (control treatment), 40 ppm
(treatment A), 60 ppm (treatment B), 80 ppm (treatment C), and 100 ppm
(treatment D) totaling 15 treatment units. The tested organism in this research was
S. costatum. The container used was a plastic jar with 2 liters capacity. The
parameters tested in this research were the maximum cell population density
achieved by seven days of maintenance, absolute growth rate, relative growth rate,
and specific growth rate. The results showed that the best cell density was found at the
treatment D (100 ppm), which was 1,228 x 104 cells / ml and the lowest cell density was
in the control treatment (without urea) which was 533 x 104 cells / ml. The results of
water quality measurements during the study were still in an adequate range and met the
maintenance requirements of S. costatum. The range of water quality parameters were
salinity 26-28 ppt, temperature of 25-27oC, and a pH of 8.
Keywords: Urea Fertilizer, Concentration, Population Growth, Skeletonema
costatum.
1) Student at the Faculty of Fisheries and Marine, University of Riau.
2) Lecturer at the Faculty of Fisheries and Marine, University of Riau
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