Alternative phosphorus sources for formulated fish feed
An experiment was conducted to evaluate the possibility of using inorganic fertilizertriple super phosphate (TSP), inorganic fertilizer 16:20 (a 16:20 grade fertilizer contains16 percent N and 20 percent P20 5), rice-bran and duck-manure as phosphorus sources informulated fish feed for Nile tilapia ( Oreochromis niloticus). Experiment was conductedfor a period of 2 months in net-cages suspended in fertilized earthen ponds and all malesex-reversed Nile tilapia (9.39- 10.37 g) were used in the experiment. Seven treatmentsincluding one non-feed treatment were used in this experiment. Treatment 1 (non-feed),treatment 2 (-P) where fish fed with phosphorus non-supplemented diet acted as control1 and treatment 3, 4, 5, 6 and 7 where fish fed with 3% di-calcium phosphate (DCP), 3%triple supper phosphate (TSP), 7% 16:20 inorganic fertilizer, 30% rice-bran and 30%duck-manure supplemented diet, respectively. Results showed that the TSP and 16:20grade inorganic fertilizer supplementation in diets as phosphorus sources wereequivalent to DCP (Di-calcium phosphate) supplementation in terms of growthperformance, feed utilization efficiency and final body composition of Nile tilapia. Ricebranand duck-manure were not found as good phosphorus sources.
| Main Authors: | , , , |
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| Format: | article biblioteca |
| Language: | English |
| Published: |
2002
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| Subjects: | Aquaculture, Fisheries, Phosphorus, Di-calcium phosphate, Triple super phosphate, Duck-manure, |
| Online Access: | http://hdl.handle.net/1834/33298 |
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