发酵后的牛粪饲养鱼种效益高近年来，笔者通过实践证明，利用发酵后的干牛粪饲养鱼种，不但生长快，又可节约饲料成本。牛粪经发酵后，具有酵母的特殊气味，呈粉末状。其化学成分与配合饲料相比，粗蛋白含量增加３０．３６％，粗脂肪增加５．０６％，粗纤维降低９．９１％... In recent years, the author has proved through practice that the use of dried cow dung to ferment fish species, not only grow fast, but also save feed costs. Cow dung by fermentation, with a special smell of yeast, was powder. Compared with compound feed, its crude protein content increased by 30.36%, crude fat increased by 5.06% and crude fiber decreased by 9.91%.