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冰封水面,鱼栖水底。北方的鱼类越冬从11月初开始进入了漫长的冰下阶段,为了能使鱼安全越冬,确保成活,除了扫雪明冰,还应及时调节好越冬水体的水质。现介绍四点,供参考应用。1 调节肥度用化肥 由于鱼类得以生存的溶解氧主要来自池水中进行光合作用的浮游植物,即生物增氧,所以调节好培养浮游植物的肥度十分重要。调节肥可用二胺,切忌用尿素,因尿素在分解中产生的尿素酶就是耗氧生物。具体作法是:先测水质,当每升水中浮游植物的个数少于两万时,或水的透明度高于50cm、水色显淡清色时,就用30kg/hm~2二胺
Frozen water, fish habitat underwater. Northern fish overwintering from early November into a long period of ice, in order to make the safety of fish wintering, to ensure survival, in addition to sweeping the clear ice, but also timely regulation of winter water body water quality. Now introduce four, for reference application. Fertilizer for regulating fertility As the dissolved oxygen that fish can survive is mainly from the photosynthesis phytoplankton in the water, namely biological aeration, so it is very important to regulate the fertility of phytoplankton. Adjustable fertilizer available diamine, avoid urea, urease produced in the decomposition of urea is the oxygen-consuming organisms. Specific approach is: first test the water quality, when the number of phytoplankton per liter of water is less than twenty thousand, or water transparency is higher than 50cm, water color was pale, use 30kg / hm2 diamine