Recycle of aquaculture waste as organic fertilizer for Brassica Chinensis

Abstract

Recycle of fish and shrimp wastes used for the growth of Brassica chinensis and nutrients (N, P and K) leaching rate was examined in the greenhouse for 4 weeks. Three types of organic fertilizer were used chicken manure, fish manure and shrimp manure. Plants treated with fish manure exhibited higher chlorophyll content and total leaf area than plant that treated with chicken manure and shrimp manure 4 weeks after application of fertilizer. Number of leaf, stem length, leaf dry weight, stem dry weight and total dry weight did not differ between plant applied with chicken manure and fish manure. Nitrogen of chicken manure exhibited the highest leaching rate while leaching rate of phosphorus for shrimp manure was the highest. On the other hand, fish manure exhibited the highest leaching rate in potassium. The result suggests that fish manure has a good potential to be used as organic fertilizer.