文献类型： 外文期刊

作者： Lu, MX ¹ ; Hai, OY ¹ ; Xiao, XZ ¹ ; Huang, ZH ¹ ; Wu, RQ ¹ ; Xie, J ¹ ;

作者机构： 1.CHINESE ACAD FISHERIES SCI, PEARL RIVER FISHERIES INST, GUANGZHOU 510380, GUANGDONG, PEOPLES R CHINA

期刊名称：INTEGRATED FISH FARMING

ISSN：

年卷期： 1998 年

页码：

收录情况： SCI

摘要： The energy conversion efficiencies of three pond types in the Pearl River Delta were measured. 1) a still-water pond, 0.247 ha in size, with no water-exchange or other oxygen increasing equipment; 2) a renewal-water pond, 0.193 ha in size, with daily water-renewal of 2,700 to 3,000 m(3)/ha; and 3) a tidal-flow pond, 0.193 ha in size, with a daily tidal-water flow of 30,255 to 42,480 mg/ha. In addition, 3 kilowatt lobe aerators were installed in the renewal-water and tidal-flow ponds. These aerators were used when fish were surfacing. The increased water exchange in two ponds permitted increased loading rates of fish and feeds, and resulted in a marked increase in net fish production, from 10.8 tonnes/ha in the stagnant pond to over 40 tonnes/ha in the tidal-flow pond. However, the impact of water exchange on energy conversion efficiencies was minimal. The conversion of biological plus industrial energy inputs into net fish production ranged from 10.1% in the stagnant pond to 12.8% in the tidal-flow pond. Observed small differences in energy conversion rates and in the energy required to produce one tonne of fish are more likely to be explained by differences in the stocking ratios of various fishes, and by slight differences in feed quality among the three ponds.