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The role of chicken manure in the production of Nile tilapia, Oreochromis niloticus (L.)
Author(s) -
KNUDHANSEN C. F.,
BATTERSON T. R.,
McNABB C. D.
Publication year - 1993
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1993.tb00623.x
Subject(s) - nile tilapia , oreochromis , chicken manure , alkalinity , manure , biology , zoology , tilapia , productivity , phosphorus , aquaculture , fishery , agronomy , fish <actinopterygii> , chemistry , macroeconomics , organic chemistry , economics
. Two grow‐out experiments were conducted to evaluate the functional role of chicken manure for Nile tilapia, Oreochromis niloticus (L.). production in central Thailand. Experiment 1 examined the relationship between chicken manure input and net fish yield (NFY). Experiment 2 determined the value of chicken manure in providing tilapia particulate organic carbon, and/or dissolved inorganic carbon (DIC) for stimulating algal productivity. In both experiments supplemental urea and triple superphosphate (TSP) gave all treatments total nitrogen (N) and phosphorus (P) inputs of 28·0kg/ha/week and 7·0kg/ha/week, respectively. Addition of chicken manure to inorganic fertilization did not enhance production of Nile tilapia. NFY in experiment 1 increased with decreasing manure loading, which corresponded to increasing TSP input. Regression analysis suggested that chicken manure‐P was about 10% effective as TSP‐P at increasing NFY. NFY was linearly correlated to net primary productivity (r 2 = 0·62, P < 0·001), which was linearly correlated to total alkalinity (r 2 = 0·77. P < 0·001).Treatment differences in alkalinity, community respiration or dissolved oxygen concentrations at dawn were not related to manure input. Simple economic comparisons discourage the purchase of chicken manure as a source of soluble N and P for increasing algal productivity in Thailand.