Analysis of energy conversion effciency in tnibanked fish pond ecosystem along coastal area

The energy conversion efficiencies of three em-banked fish pond ecosystems ,namely,fine fodder,grass and fertilizer for fish culture,were analyzed in the seashore,and the economic efficiency of grass-fed system was anlalyzed .The results showed that attention should be paid to solar ener-gy utilization in low input’s embanked fish pond ecosystem a-long the coastal areas .The encrgy conversion efficiency of thegrass- fed system was the highest among three fish culture models,and the economic efficiency was better.The technique of planting grass for fish culture shoud be popularized in or-der to raise the utilization efficiency of natural resources along the coastal area.