1、选择优良的青饲料品种。目前比较常见的优良青饲料有黑麦草、苏丹草、苦荬菜、橡草、串叶松香草、浮萍等。不同的青饲料具有不同的营养价值,有的甚至有显著差异。如人工种植的优质豆科牧草,其饵料系数为25～30,是一般野生杂草的1/3左右。因此,选择优良的青饲料品种是非常重要的。在鱼类的不同生长发育阶段,也应选择不同的 1, choose a good variety of green fodder. At present, the more common excellent green feed are ryegrass, sudangrass, bitter gourd, oak, string grass, duckweed and so on. Different green fodder has different nutritional value, and some even have significant differences. Such as artificial cultivation of high quality leguminous forage grass, the feed coefficient of 25 to 30, is generally about 1/3 of wild weeds. Therefore, the choice of excellent green forage varieties is very important. In the different stages of fish growth and development, should choose different