Pond fertilization is a
common practice in aquaculture aimed at increasing the production of natural
food for farmed fishes. Inorganic fertilizers are expensive and their use bysmallholder farmers may be limited. Animal wastes are widely used in many
countries to sustain pond productivity at a low cost.
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| Periphyton |
Organic fertilizers
decompose and release nitrogen, phosphorous and potassium which are used by
phytoplankton for growth and reproduction. In addition, they provide attachment
sites for bacteria and other microscopic organisms. Plankton perform other
important functions in pond aquaculture - a net producer of dissolved oxygen,
which is indispensable for fish growth and the most important sink of
ammonia-nitrogen, which is excreted by fish. Jhingran observed that natural
food also supplies certain digestive enzymes that improve the utilization of
artificial diets. The FAO/AADCP Regional Expert Consultation
has emphasized the need for a greater understanding of the role of natural food
organisms in semi-intensive farming based on systems that optimize pond
fertilization. Read more>>>>>>>
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