Efficacy of liming and liming materials for shrimp pond management | |
| Author | Zaenal Arifin |
| Call Number | AIT Thesis no.AE-96-28 |
| Subject(s) | Liming of soils Shrimp culture Pond soils |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | Brackishwater shrimp culture ponds are often constructed in highly acidic soils along the coast. Liming has been described as a method for reclaiming acid sulfate soils, and for increasing pH, total alkalinity and total hardness of the water. Many kinds of lime have been used in shrimp culture with different strategies. Experiments were conducted in 10 L glass jars and circular tanks to determine the effect of lime materials on soil deacidification, water quality, and growth and survival of Penaeus monodon in different salinities. This experiment using a completely randomized design and two factorial. Glass jar experiment was conducted for 11 days using 4 kinds of lime; CaCO3, CaMg(CO3) 2, Ca(OH)2 and MgO with dosage 1 g CaCO/L or the equivalent in 8 L of water with salinity at 0, 5, 10, 15, 20, 25 and 30 ppt. Results of this experiment indicated that Ca(OH)2 and MgO increased higher water pH and significantly different than that of CaCO3 and CaMg(CO3)2 (p<0.01). MgO resulted in the highest water alkalinity and hardness, and followed by CaMg(CO3) 2, Ca(OH)2 and CaCO3 . Those liming materials were more effective to increase water alkalinity and hardness in water with lower salinity. Shrimp culture experiment was conducted in circular tanks containing acid-sulfate soils which were reclaimed to reach soil pH 4.5- 5.0. Effect of CaCO3, CaMg(CO3) 2 and MgO on water quality and soil acidity were determined at 0, 10, 20 and 30 ppt of salinity. Phytoplaknton were inoculated and shrimp were stocked at 30 juveniles/m2 in those tanks. Results of this experiment indicated that lime applications to the soil were able to deacidify the soil and to prevent acidification of overlying water. Application of MgO resulted in significantly higher soil pH than that of CaCO3 and CaMg(CO3) 2 (p<0.01). However, soil treated with CaC03 or CaMg(C03) 2 resulted in greater average shrimp weight gain (AWG), i.e; 6.48, 6.72, 6.80, and 6.75, 6.59, 6.48 g in salinity 10, 20, 30 ppt, respectively with corresponding survival rate (SR) at 79.9, 83.3, 86.6 and 76.7, 76.7, 83.3 % in those salinities. These results are significantly different (p<0.01) from that of MgO which resulted in 4.09, 4.99, 4.67 g of AWG and 49.9, 63.3, 59.9 % of SR in those salinities, respectively. The effect of lime materials on phtyoplankton growth is not significantly different (p>0.05), but significantly different among water salinities (p<0.01) No interaction was observed between liming material application and water salinity (p>0.05). The conclusions are that every liming material has different efficacy in improving water and soil quality, and shrimp survival and growth in low salinity; liming is not necessary to maintain optimum pH, total alkalinity and hardness in brackishwater (> 10 ppt); and for low salinity (<10 ppt), the most suitable and cost effective liming materials are CaCO3 and CaMg(CO3)2. |
| Year | 1996 |
| 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 Food Engineering (AE) |
| Chairperson(s) | Chang, Kwei Lin; |
| Examination Committee(s) | Yakupitiyage, Amararatne;Hambrey, John B.; |
| Scholarship Donor(s) | Government of United Kingdom; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1996 |