Abstract
The effects of poultry manure, digested sewage sludge cake and cow-dung on plankton production and fish growth were evaluated. Both plankton production and fish growth ( Catla catla and Cyprinus carpio var. Communis) were found to be highest in the poultry manure treatment, followed by the sludge cake and cow-dung treatments. Compared with the cow-dung treatment, total fish production was 50·6% more in the poultry manure and 19·0% more in the sludge-cake treatment. In terms of dry weight of the manures, the fertiliser (manure) coefficients (kilogramme of fertiliser per kilogramme of fish production) were 5·2, 6·6 and 7·8, respectively for poultry manure, sludge cake and cow-dung.
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