Abstract:
An experiment was conducted in the 2a Biotech Laboratory of Horticulture Department
of Sher-e-Bangla Agricultural University during the period of 1 March 2018 to 15 March
2018 to observe the growth and yield performance of Spirulina platensis. Spirulina
platensis was allowed to culture in standard Zarrouks Media (T
) and three different
concentrations of Modified Zarrouks Media viz. Zarrouks Media containing 0.01M urea
(T
2
), Zarrouks Media containing 0.02M urea (T
3
1
) and Zarrouks Media containing 0.04M
urea (T
). This experiment was arranged in a Completely Randomized Design. Fifteen
days of production was carried out and to find out a promising Spirulina production
technology. The growth rate of Spirulina platensis was found to vary in different
concentrations of urea solution. The basic concentration of 4mg/L of inoculum gained
maximum cell weight (607mg/L) in Zarrouks Medium (ZM) and is significantly (p>0.05)
higher than the maximum cell weight (454mg/L) found in Modified Zarrouks Medium
(MZM) containing 0.01M of urea solution (T
4
1
); 0.02M of urea solution (T
) and 0.03M
of urea solution (T
3
) respectively on the 12
th
day of the culture period. Similar trend was
also observed in the case of chlorophyll a content and optical density (OD) measurement
of Spirulina platensis as well. T
showed the best result in the given growth parameters
such as specific growth rate (0.086), OD (0.66mg/L) and chlorophyll a content
(7.133mg/L) in comparison with treatments utilizing the urea solution viz. T
2
.
Quality Spirulina production technology can be obtained by using low dosage of urea
solution in comparison to other standard type of Spirulina production technology. These
findings may be a source of valuable information for a cheap and quality Spirulina
production system in Bangladesh by using urea as the readily available nitrogen source.
Description:
A Thesis Submitted to
The Department of Horticulture,
Faculty of Agriculture Sher-e-Bangla
Agricultural University, Dhaka in partial fulfillment
of the requirements for the degree
of
MASTERS OF SCIENCE (MS)
IN
HORTICULTURE
