Effect of Two Organic Fertilizers on Phytoplankton Abundance Cultured Under Laboratory Condition

The comparative effects of two animal manures (chicken and cow manures) on phytoplankton abundance and water quality were investigated under laboratory condition. Two concentrations of each manure were used to produce four treatments plus the control treatment resulting to five treatments (T1 10g of chicken manure, T2 20 g of chicken manure, T3 10 g of cow manure, T4 20 g of cow manure, and T5 is the control without any manure). The treatments were replicated thrice and were kept and monitored in the laboratory for twenty-one days. Data collection was done every three days. The identified phytoplankton groups in this study were Cyanophyta, Eugenophyta, Cyanophyta, and Bacillanophyta (in order of abundance). The phytoplankton biomass results revealed that T1 and T2 (chicken manure) treatments were higher than the other treatments and were significantly different (P=0.012) in the following order T2>T1>T4>T3>T5, 2.19, 1.87, 1.04, 0.93, and 0.04. Statistical analysis on the water quality parameters revealed that the treatments were not significantly different (P>0.05) in Temperature (P=0.619), pH (P=0.465), Dissolved Oxygen (P=0.129), Alkalinity (P=0.252), but were significantly different in Nitrate (P=0.0001), Ammonia (P=0.004) and Transparency (P=0.0001). Analysis of correlation on phytoplankton abundance and water quality parameters indicated that Temperature, pH, Alkalinity, Nitrate and Ammonia were positively correlated (0.636, 0.862, 0.884, 0.806 and 0.837) with phytoplankton abundance except for Dissolved Oxygen and Transparency which were negatively correlated (-0.716 and -0.418). The study results revealed that chicken manure is the preferred media for phytoplankton culture under laboratory condition but with caution as excessive used of it can lead to low Dissolved Oxygen and Transparency.

Fish Food, Physiochemical Parameters, Chicken Manure, Cow Manure, and Live Microscopic Organisms.

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