近年来,不少养鱼户由于不会计算用于防治血病的药量,使渔业生产蒙受一些不必要的损失。其实,用药量的多少,是根据发病时所需的药物浓度和池水的多少这两个因素决定的。所谓药物浓度,就是指溶化在水中的 In recent years, many fish farmers have suffered some unnecessary losses because they will not calculate the amount of drugs used for the prevention of blood diseases. In fact, the amount of medication, is based on the time of onset of the drug concentration and the amount of water in the pool of these two factors. The so-called drug concentration, refers to the melting in the water