Determination of chlorophyll a and total phosphorus abundance in organic manured fish ponds
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2012, Vol 5, Issue 4
Abstract
An experiment was conducted for 6 weeks (between August and September 2010) with 4 treatments (T1: poultry manure, T2: cattle manure, T3: poultry and cattle manure and T4: control-no manure) assigned to 8 concrete ponds at random to determine chlorophyll a and total phosphorus abundance in organic manured fish ponds. Results of the study suggest that T1, T2, and T3 had an effect on chlorophyll a and total phosphorus abundance in organic manured ponds. The final mean average for chlorophyll a ranged from 0.0105mg/m3 to 0.045mg/m3 and that of total phosphorus ranged from 0.024mg/50mL to 0.522mg/50mL. Chlorophyll a and phosphorus were positively correlated with a coefficient of 0.92 and it was significant (p ≤ 0.05). However, weekly performance of chlorophyll a and total phosphorus was higher in T3 compared to other treatments. The treatments also showed differences in the number of plankton species available. Phytoplankton species in T3 increased from 888 in week three to 933 in week six. However, the zooplankton species reduced from 10 in week three to 4 in week six compared to other treatments. These results indicate that animal manure varied in influencing the production of chlorophyll a, planktons and phosphorus. The variation may be attributed to feed nutritive value of the animals to which they were fed. Farmers should therefore be encouraged to use a combination of poultry and cattle manure to obtain maximum benefits in increasing chlorophyll a and total phosphorus.
Authors and Affiliations
Kelvin Chanda, Confred Musuka
Keywords
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