冬春是投放鱼种的季节,因价格差异,从外地购运鱼种的养殖户越来越多。外出购运鱼种应注意以下几点:一、选购鱼种的塘口应了解其日常管理措施现在大部分培育鱼种的塘口,养殖户为了追求更高的经济效益,放养的密度偏高,投喂的饵料偏精,甚至为降低饵料系数和控制鱼病,大量使用激素? Spring and winter is the season of putting fish species, due to price differences, more and more farmers from the field to buy fish species. Outbound shopping species should pay attention to the following points: First, the purchase of fish ponds should be aware of its daily management measures Most cultivated fish ponds now, farmers in pursuit of higher economic efficiency, stocking density of the partial High, fed bait precision, and even reduce the bait coefficient and control of fish disease, a large number of use of hormones?