根据投放鱼种的规格,选择合理的拦网网目,是围栏养鱼的重要步骤。但是,如何做好这一步工作,却颇为困难。网目太小,影响过水,增加投资,造成浪费;网目过大,则拦不住色,不能发挥拦鱼设备的作用。另外,围栏养鱼放养的鱼种有多种,它们有不同的形态特点,我们当然不可能采用多种拦网规格,而只能以某一种鱼为标准。据有关资料报道,拦网网目的规格可以鲢 According to put the fish species specifications, choose a reasonable block network, fencing is an important step in fish farming. However, how to do this step is quite difficult. Mesh is too small, affecting the water, increase investment, resulting in waste; mesh is too large, can not stop the color, can not play the role of equipment to stop the fish. In addition, there are a variety of species of fish stocked in the pen fence, they have different morphological characteristics, of course, we can not use a variety of blocking specifications, but only to a certain kind of fish as the standard. According to the information reported, blocking the size of the target network can be silver carp