| Author | Ratnayake, R. K. S. |
| Call Number | AIT Thesis no. AE-91-35 |
| Subject(s) | Cladocera
|
| Note | A thesis submitted in partial fulfillment of the requirements
for the degree of Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | Five experiments were conducted in outdoor concrete tanks
over a five-month period to investigate the feasibility of developing
a Moina culture system u sing buffalo manure, chicken
manure, rice bran plus fish wastes (1:2), septage and inorganic
fertilizers as inputs. A factorial experiment (Experiment 1)
conducted with 5.7 g/m3 and 11.4 g/m3 loadings of buffalo manure,
chicken manure and rice bran plus fish wastes (1:2) did not yield
a high Moina production. A high initial loading of 566 g/m3 of
rice bran plus fish wastes (1:2) followed by the subsequent
loading of 75.5 g/m3 gave a significantly higher Moina production
than either buffalo or chicken manure inputs.
The third experiment was conducted in factorial design with
two levels of shading and two levels of aeration in the tanks
loaded with 566 g/m3 of rice bran plus fish wastes (1:2) indicated
that unshaded aerated tank s gave a significantly higher
production than those of other treatments. The subsequent loading
of 75.5 g/m3 of rice bran showed a negative effect on Moina
production.
The fourth experiment designed to rank the effect of some
selected inorganic/organic inputs and their mixtures on Moina
production. The Experiment 4 revealed that the tanks loaded with
rice bran plus fish wastes (1:2) together with inorganic fertilizers
(urea (46 - 0 - 0), N- P-K (16 - 20-0), triple superphosphate
(0-46-0)) after inoculation of Chlorella prior to Moina introduction
enhanced Moina production. This treatment was equally effective
as the treatment of Ami Ami (mono sodium glutamate waste)
plus inorganic fertilizers. The loading of 566 g/m3 of rice bran
plus fish wastes (1:2) without inorganic fertilizers was a l so
equally effective as that of Ami Ami and inorganic fertilizers.
The Chlorella inoculation showed a significant effect in the
tanks loaded with 566 g/m3 of rice bran plus fish wastes (1:2) on
Moina production.
The loading of tanks with the rice bran plus fish wastes
(1:2) with inorganic fertilizers and Chlorella inoculation gave a
mean calculated Moina yield of 155 g/tank in Experiment 5 even though
this was only 39.5% of total gross yield. The comparison
of extrapolated yield of Moina in this system with that of the
existing commercial culture system in Thailand indicated that
yield observed in this system was comparable with that of the
latter system. |
| Year | 1991 |
| 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) | Yakupitiyage, Amararatne; |
| Examination Committee(s) | Little, David C.;Lin, Chang Kwei; |
| Scholarship Donor(s) | Government of Denmark; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1991 |