在目前饵料价高,鲜鱼市场疲软,养鱼效益双向变化的情况下,千方百计降低成本就显得重要了,而养鱼成本中,投资比例最大的莫过于饵料。据调查,饵料开支一般要占投资的60—70％,因而要想提高养鱼效益,重点就得放在饵料上。湖北省汉川县国营刁汊湖养殖场近几年在这方面摸索了一些经验,他们利用每年3—6月鱼苗小的机会,并塘集中精养,腾出80％的养鱼池或湖水面,种青养鱼。方法是:将塘、湖水排浅至1—3厘米,每亩撒催芽后的稻、稗子10公斤,随着苗子的长高,以不淹毛眼为准,逐步加深塘水或湖水,6月底至7月初,鱼苗长大,灌深水淹青,亩洒石灰50公斤,7天后,将原并塘的鱼种投放于塘、湖中,既吃稗、稻籽粒,又吃稻、稗叶子。1990年全场种青2.5万亩,亩平产稗、稻 Under the current situation of high feed prices, weak fresh fish market and two-way changes in fish farming efficiency, it is important to reduce costs by all means. However, among the costs of fish farming, the largest proportion of investment is food. According to the survey, food expenses generally account for 60-70% of the investment, so in order to improve the efficiency of fish farming, the focus must be placed on the food. Hanchuan County, Hubei Province, State-owned Diaohu Lake farms in recent years in this area to explore some of the experience, they use the annual 3-6 months fry small opportunities, and Tong focused intensive, vacate 80% of the fish pond or lake Water surface, grow green fish. The method is as follows: The ponds and lakes shall be drained shallow to 1-3 cm, and the germination of rice and weeds shall be 10 kg per acre. With the growth of the seedling, the lake or lake shall be deepened step by step. 6 The end of July to early July, fry grow up, deep irrigation flooded green, 50 acres of lime sprinkling lime, 7 days later, the original and pond species put in ponds, lakes, both eat barnyard, rice, eat rice, barnyardgrass leaves . In 1990 the audience planted 2.5 million mu of land, mu of flat barnyard grass, rice