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在养殖技术上突破北方地区现有的习惯性养殖方式,推行适合北方池塘养鱼的生产模式,是提高北方池塘养殖食用鱼经济效益的有效途径。其技术上的主要内容是: 1.合理的放养种类; 2.各种鱼、鱼种规格及混养比例; 3.适宜的密度; 4.套养大鱼种的方法; 5.轮捕时间、次数、方法和注意事项; 6.饲料的适宜配方和投饲量; 7.培养水质的科学措施。采用以上技术措施,亩净产可达380～550公斤,比北方同类型产量高100～250公斤,亩纯收入可达1000元,增收30％以上,养鱼周期
Breaking the existing customary breeding methods in the northern region and promoting the production mode suitable for the fish farming in the northern ponds is an effective way to improve the economic benefits of farmed fish in northern ponds. The main technical contents are as follows: 1. Reasonable stocking types; 2. Species and polyculture ratio of various fish species; 3. Appropriate density; 4. Method of raising large fish species; , Frequency, methods and precautions; 6. The appropriate formulation and feeding amount of feed; 7. Scientific measures to cultivate water quality. Using the above technical measures, the net output of mus can reach 380-550 kg, which is 100-250 kg higher than that of the same type in the north. The net income per mu can reach 1,000 yuan, an increase of 30% or more. The fish farming cycle