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我国大宗出口的冻去头对虾1983年每吨平均价为11470.7美元,到1989年已降至6100美元。从国内市场的承受能力看,每公斤商品对虾的成本只有降到15元以下才有收益,但鉴于成本构成中的土池折旧、水电人工开支等非饵料支出降低很困难,故只能在降低饵料成本即大幅度提高饵料转化效率方面挖掘潜力。根据国内外的大量文献资料和唐海县的网箱、土池试验结果,每公斤对虾的饵料成本降低到9元以下是可能的。现将有关情况及方法简介如下。一、网箱、土地试验概况
China’s bulk exports of frozen head shrimp in 1983 average price per ton was 11470.7 US dollars, to 1989 has dropped to 6100 US dollars. Judging from the affordability of the domestic market, the cost of shrimp per kilogram of commodities is only reduced to less than 15 yuan. However, due to the depreciation of earth ponds in the cost structure and the reduction of non-food expenditures such as hydropower and labor expenses, it is difficult to reduce food consumption The cost is to greatly improve the conversion efficiency of bait mining potential. According to a large number of domestic and foreign literature and data in Tanghai County cage, soil pool test results, the feed cost per kilogram shrimp reduced to 9 yuan or less is possible. Now the situation and methods are as follows. First, cages, land test profiles