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Fertilizers for Increasing the Natural Food for Fish in Ponds
Author(s) -
Swingle H. S.,
Smith E. V.
Publication year - 1939
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1938)68[126:ffitnf]2.0.co;2
Subject(s) - potash , acre , lime , phosphorus , environmental science , fertilizer , fish <actinopterygii> , distilled water , plankton , zoology , agronomy , fishery , biology , chemistry , agricultural science , paleontology , organic chemistry , chromatography
Experiments using commercial fertilizer in distilled water indicated that an N–P–K–CaCO 3 ratio of 4:1:1:8 gave most economical plankton production. Pond waters in Central Alabama were found to require the addition of nitrogen, phosphorus, potash, and lime for maximum fish and plankton production. For use in pond waters, the above ratio was used with the amount of phosphorus doubled, giving a 4:2:1:8 ratio of N–P–K–CaCO 3 . The application of this mixture of commercial fertilizers gave a fish production of 578 pounds per acre, compared to 134 pounds per acre in the unfertilized control. The amounts of commercial fertilizers used at present per acre per application are 40 pounds sulfate of ammonia 60 pounds superphosphate (16 per cent) 5 pounds muriate of potash 30 pounds basic slag (or 15 pounds CaCO 3 ) Experiments are still in progress to determine if smaller applications can be used successfully.