Nutrient release characteristics of duck manure for Nile tilapia production | |
| Author | Ullah, Md. Amir |
| Call Number | AIT Thesis no. AE-89-43 |
| Subject(s) | Tilapia Fishes--Feeding and feeds Ducks--Manure |
| Note | A Thesis submitted in the partial fulfilment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | This study examined the effect of duck diet, bedding material and manure storage on nutrient release characteristics of duck manure in water. A second experiment examined the effect of those factors on the suitability of duck manure for improving yields of Nil e tilapia (Oreochromis niloticus ) . The first experiment was fresh manure of low and high grade diet with and without rice husk; the second one was four week old manure of the same low grade diet as used in the first experiment, except manure was stored under two different conditions; and the third was four week old manure of high grade diet stored as in the second experiment. The accumulative ammonia-N released from manure in the first experiment varied from a minimum 6 . 5 mg / g dry matter (DM) t o a maximum 9 . 2 mg / g DM a nd soluble reactive phosphorus (SRP ) release varied f rom 1 . 7 mg / g DM to 2 . 0 mg / g DM . In second experiment , the accumulative ammonia - N release from manure varied f rom 7 . 0 t o 8 . 8 mg/g DM a nd SRP release varied from 2.2 mg / g DM to 2.6. mg / g DM . In third experiment the release of ammonia-N range from 7.lto 9. 1 mg / g DM a nd t h e SRP release varied from from 3 . 5 to 4.1 mg/g DM. Nearly all soluble nitrogen and phosphorus were released on the fourth day of manure application . The release was in creased by the improved diet management of manure. Use of bedding material of the amount of nutrient release on a per unit rate of nutrient manure and proper ca used a reduction weight basis. The improved manure obtained from high grade diet in creased the fish yield but the use of bedding materiel did not effect the fish yield significantly. |
| Year | 1989 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| 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) | Knud-Hansen, Christopher F. ; |
| Examination Committee(s) | Edwards, Peter ;Little, David C. ; |
| Scholarship Donor(s) | The British Council ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1989 |