Study on azolla as a fish fodder
1987
Chen De-fu | Huang Chun-Yuan (Zhejiang Academy of Agricultural Sciences, Hangzhou (China). Inst. of Soil Fertilizer)
Fresh azolla is tender and is preferred to dry wheat bran by herbivorous and omnivorous fish. Six species of azolla, however, vary in their edibility, and even the same species may have different edibility for different fish species. Azolla is rich in nutrients. The crude protein and crude fat content of azolla usually exceed those of wheat bran. The nutrient content of azolla is influenced by seasonal variations and culture techniques. The feed coefficient of azolla is 20-50. That means that the nutrient value of 10-20 kg fresh azolla is equivalent to 1 kg dry wheat bran. Fish fed a combined ration of azolla and mixed fodder yielded more than fish fed with either azolla or mixed fodder alone. Azolla is a potential source of fish fodder due to its high yield, enriched nutrients, good edibility, and lower feed coefficient.
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