池塘养鱼新措施１．投放鱼种规格越大越好过去池塘鱼种投入规格大都在５～１０厘米，重量在１０～３０克以内。现代养鱼理论和实践证明，鱼种规格不得小于１５厘米，重量在５０克以上。在一定范围内，规格越大，成活率越高，产量越高。２．增氧机最好在晴天中午开放许多养... Pond fish new measures 1. The larger the size of fish species put in the past the specifications of most of the pond fish into the 5 to 10 cm, weighing 10 to 30 grams. Modern fish farming theory and practice have proved that the size of fish species shall not be less than 15 cm, weighing more than 50 grams. Within a certain range, the larger the specification, the higher the survival rate and the higher the yield. 2. Aerator is best to open in the sunny noon a lot of support ...