| Author | Mohsinuzzaman, Md. |
| Call Number | AIT Thesis no. AE-92-33 |
| Subject(s) | Fish-culture
|
| Note | A thesis submitted in partial fulfillment requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The present study was conducted to determine the value of
goat wastes to aquaculture derived from a stall-fed goat
production system in which solid and liquid manures including
waste feed stuffs were collected separately.
Wastes (HN) from goats fed a diet comprising 60/. (OM basis)
of fresh leucaena leaf (Leucaena leucocephala) were compared to
those from goats fed fresh grass (Panicum maximum) and fine rice
bran only (LN). Both solid and liquid waste productions were
analyzed for nutrient content; release characteristics of major
nutrients (total N and P) and their value in the fertilization of
tank -cultured Nile tilapia (Oreochromis niloticus).
Solid and liquid wastes from Leucaena- fed goats were 75-100/.
higher in total nitrogen but contained only 30/. of total
phosphorus in waste from goats fed grass and rice bran alone.
Nutrients were released to maximum l eve l s after 3-4 days in
each waste. TKN re l eased from solid wastes reached 10.7 mg N/g OM
and 16.5 mg N/g DM from goats fed low and high nitrogen (LN and
HN) diets respectively, 0.9 mg N/ml and l. 97 mg N/ml in liquid
wastes. Over 60/. of total phosphorus was released as soluble
reactive phosphorus (SRP) after 3-4 days (so lid; HN 2 .1 mg P/g
DM, LN 6.6 mg P/g DM; Liquid, HN 0.01 P/ml, LN 0.05 mg p/ml).
Fish growth response was compared in tanks receiving liquid
wastes only (HNL,LNL), solid wastes only (HNS, LNS) and a mixture
of both at the ratio produced by the animals (HNS+HNL, LNS+LNL).
Inorganic fertilizers were added as required to ensure all
loadings at anisonitrogenal level and standard N:P ratio
maintained (3 Kg. N/h/d and 5 respectively). In addition an
inorganic on l y (urea and TSP) and commercial floating pellet (3'l.
body wt./day) were used as controls. Daily weight gain of
treatments varied from 0.39±0.2 g/fish/day (HNL) to 1.02±0.03
g/fish/day (Pellet ) . Growth and survival was poorest in the wet
waste treatments and best in pellet and LNS+LNL treatment.
Mortality was particularly significant (501.) in the liquid waste
treatments and may be related to goat husbandry practices,
including deworming a nd ectoparasite control, occurring slightly
prior to the study. |
| Year | 1992 |
| 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) | Little, David C. |
| Examination Committee(s) | Edwards, Peter ;Knud-Hansen, Christopher F.
|
| Scholarship Donor(s) | The British Council. ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology,1992 |