| Sediment accumulation in fish ponds:its quality and quantity as a crop fertilizer (2004) | |||||||||
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| SEDIMENT ACCUMULATION FISH PONDS ITS QUANTITY AND QUALITY CROP FERTILIZER Muendo J Stoorvogel Naggar Milstein van Dam and Verdegem The World Fish Center Africa and West Asia Regional Center Sharkia Box Maadi Cairo Egypt Email pmuendo worldfish org ABSTRACT Accumulation nutrient rich sediment aquaculture pond bottoms has been reported The accumulated sediment however fills ponds reducing their volume while accumulated organic matter releases toxic elements hydrogen sulfides and nitrites and impacts high oxygen demand Periodic removal accumulated sediment thus necessary The nutrients trapped the accumulated sediment however could useful farm resource Utilization nutrients pond sediment fertilization agricultural produce Asia has had positive impacts the rural communities through reduced costs fertilizers and increased income levels due diversity produce The adoption integrated aquaculture agriculture systems Africa where serious food challenges exist and lie head has been slow Its promotion has been limited scarcity quantitative data the potential benefits one system the other The aim this study was quantify the sediment and nutrients accumulating pond sediments during culture period determine whether accumulation affected nutrient input type and stocking density and asses its potential fertilizing effect Sixteen earthen ponds were allocated treatments with replicates completely randomized factorial design all ponds Nile tilapia fingerlings were stocked The factors analysed wer | |||||||||
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