我国北方寒冷地区,一般11月结冰,翌年4月解冻,冬季封冰期长达5～6个月,如何确保鱼种安全越冬? 1,封冰期水质调节①补水调节经常注水增氧,可改善水溶氧条件。池塘结冰前一般要求水深2米左右,封冰后要水分期补水,保持水位和水质良好。要求池水呈微碱性,含氧量3毫克/升以上。②施肥调节水质过瘦的鱼池可适当追施化肥,使池水保持一定的肥度,促进浮游植物 How to ensure the safety of species of winter? 1, the regulation of water quality in the ice age ① water supply regulation often watering oxygen, can be improved Water-soluble oxygen conditions. The general requirements of the pond before icing water depth of about 2 meters, after the closure of ice to water replenishment, to maintain the water level and water quality is good. Requires water was slightly alkaline, oxygen content of 3 mg / l above. ② fertilization regulation of water quality too thin fish ponds can be topdressing fertilizer, the water to maintain a certain degree of fat, promote phytoplankton