TY  - SER
AU  - Ullah,MdAmir
AU  - Knud-Hansen,Christopher F.
AU  - Edwards,Peter
AU  - Little,David C.
ED  - The British Council, 
TI  - Nutrient release characteristics of duck manure for Nile tilapia production
T2  - Thesis
PY  - 1989///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Tilapia
KW  - Fishes
KW  - Feeding and feeds
KW  - Ducks
KW  - Manure
N1  - A Thesis submitted in the partial fulfilment of the requirements  for the degree of Master of Science, School of Environment, Resources and Development; Thesis (M.Sc.) - Asian Institute of Technology, 1989
N2  - 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
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B17894
ER  -