Organic Materials as Fertilizers for Fish Ponds

Autor:	H. S. Swingle, E. V. Smith
Rok vydání:	1943
Předmět:	biology Fish farming digestive oral and skin physiology fungi Fish pond Soybean meal Fishing food and beverages Aquatic Science biology.organism_classification Algae Productivity (ecology) Agronomy Mosquito larvae parasitic diseases Cottonseed meal Ecology Evolution Behavior and Systematics
Zdroj:	Transactions of the American Fisheries Society. 72:97-102
ISSN:	1548-8659 0002-8487
DOI:	10.1577/1548-8659(1942)72[97:omafff]2.0.co;2
Popis:	The production of fish in ponds can be increased by the use of organic fertilizers such as cottonseed meal and soybean meal, and productivity can be further increased by the addition of superphosphate to these meals. From the standpoint of fish production alone, such organic materials are worthy of consideration as fertilizers for fish ponds. There are certain limitations to the use of both cottonseed meal and soybean meal, alone or in combination with superphosphate, however. In experiments, dense growths of filamentous algae developed in ponds fertilized with the above materials. Excessive amounts of filamentous algae are objectionable in ponds; they interfere with fishing and harbor mosquito larvae and pupae. In addition, although cottonseed meal stains water brown, ponds fertilized with this material are usually too clear for best fishing. Some means must be found for overcoming the objectionable features of organic fertilizers before they can be generally recommended for use in ponds, even t...
Databáze:	OpenAIRE
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