The effect of aeration on water quality and fish production in inorganically fertilized ponds | |
| Author | Jatuporn Bundit |
| Call Number | AIT Thesis no. AS-97-02 |
| Subject(s) | Water--Aeration Fish ponds--Fertilization |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AS-97-02 |
| Abstract | The experiment was conducted to evaluate the effect of night time aeration by means of paddle wheel aerator on water quality and the growth and production of Tilapia ( Oreochomis niloticus) in inorganically fertilized ponds. There were three aerated treatments in triplicates consist of the different duration of the aeration: 4 hr night-l(T-1), 8 hr nighrl (T-2) and 12 hr night-l(T-3) and non-aeration as control. An average fingerling of 4.4 g were stocked at 2 fish m-2 in 0.036 ha earthen pond. The ponds were fertilized weekly by using Urea and TSP at the rate of28 kg N and 7 kg P ha-lweek-1, respectively. The were no significant differences in final mean weight and daily weight gain of fish between treatments (p >0.05). The maximum net fish yield and survival were achieved in all aeration treatments. Among treatments, T-1 gave the highest fish yield (1,443 kg ha-1 crop-1) while the lowest fish yield was recorded in non-aerated treatment (1,112 kg ha-1 crop-1). However, there was no significant difference in fish yield between the treatments (p >0.05). The survival rate in T-1, T-2, T-3 and control was 84, 77, 88 and 67 percentage, respectively. Aeration helped in improving the night time DO vertical destratification. The loss of DO through atmosphere was greatest in T-3. All aeration treatments were significantly high in total suspended non-volatile solids, total phosphorus and nitrate-nitrite nitrogen. There were no significant differences in concentrations of chlorophyll a, pH, total alkalinity and total ammonia nitrogen between all treatments. |
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AS-97-02 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Aquatic Systems(AS) |
| Chairperson(s) | Lin, C. Kwei; |
| Examination Committee(s) | Salokhe, V. M. ;Yakupitiyage, Amararatne ; |
| Scholarship Donor(s) | DANIDA ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1997 |