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为查明鲤鱼和虹鳟对锰、铜的需求量及其与鱼体畸形的关系,作者以1.8克的鲤鱼和1.5克的虹鳟为试验对象,分别在水温19～28℃、15～20℃下饲养12—16周。试验用的配合饵料用硫酸锰和氯化铜调节饵料中的锰和铜的含量,饲育水用活性炭除去残留的氮。试验取得了如下结果:含锰4 ppm的饵料与含锰12—13ppm的控制饵料(调正区)相比,这两种鱼的增重率低,鱼体内的含锰量也低,并在虹鳟的尾部出现发育异常——体长变短,特别是鱼体后半
In order to find out the demand of manganese and copper for common carp and rainbow trout and its relationship with fish deformity, the experiment was conducted with 1.8 g of carp and 1.5 g of rainbow trout respectively at the water temperature of 19-28 ℃ and 15-20 ℃ Feeding for 12-16 weeks. Test with the bait with manganese sulfate and copper chloride in the feed to regulate the content of manganese and copper feed water with activated carbon to remove residual nitrogen. The results obtained in the experiment were as follows: The feed containing 4 ppm of manganese had lower weight gain rate and lower manganese content in the fish than the control diet containing 12-13 ppm of manganese (calibration zone) Tail dysplasia - shorter body length, especially after the fish half