我国养蚕历史悠久,而养蚕的副产品——蚕沙(系蚕粪和剩桑叶的混合物)是一种良好的鱼饲料和肥源。据测算:每百公斤干蚕粪相当于15公斤硫酸铵、5公斤磷酸二氢钙和100公斤草木灰肥效的总和。用蚕粪做鱼饲料,一般每10公斤蚕粪可生产1公斤鱼,并且有清凉解毒,减少鱼病的功能。蚕沙喂鱼方法要得当,否则会适得其反,甚至导致毒死鱼的现象发生。第一,分离先将蚕沙中的蚕粪与剩桑叶分开,剩桑叶不为鱼饲料,因为蚕食用过的桑叶尽是一些叶茎,很难被鱼类摄食,而且日久还可能造成水质污染。第二、浸泡发酵将分开的蚕粪放进 Sericulture in our country has a long history, and sericulture silkworm (silkworm excrement and mixture of leftovers) is a good fish feed and fertilizer source. It is estimated: per kilogram of dry silkworm manure equivalent to 15 kg of ammonium sulfate, 5 kg of calcium dihydrogen phosphate and 100 kg of ash combined effect. With silkworm excrement to make fish feed, usually every 10 kilograms of silkworm excrement can produce 1 kilogram of fish, and have detoxification, reduce the function of fish disease. Silkworm sand feeding method should be properly, otherwise it will be counterproductive, and even lead to poisoning of fish phenomenon. First, the separation of silkworm excrement silkworm excrement leaves and left the first mulberry leaves, the left mulberry leaves are not fish feed, because the mulberry leaves used to make some of the leaves, it is difficult to fish food, but also for a long time May cause water pollution. Second, dipping and fermentation separate silkworm excrement into