关于白鲢营养,笔者曾就食谱、食物的选择性和消化性等问题作过论述。鉴于有些问题前文尚未涉及,有些工作当时未能引用,此外十余年来国内外又有了许多新的进展,特别是近年动物营养学的研究逐渐同生物能量学结合起来,在白鲢方面也出现一些很有意义的工作。因此对白鲢的食物问题再次作一全面的总结,仍是十分必要的。 一、细菌和腐屑的意义 细菌细胞极微小,过去以为仅在附着于腐屑上面时才能被白鲢滤食。近年的工作表明:水中浮游细菌通常有半数以上聚结成絮状、块状或膜状聚合体,可为白鲢直接滤食。菌膜常浮于水面,被风吹刮落入水中后甚至白鲢仔鱼也能摄食。白鲢对细菌的摄食量与浮游藻类的丰度有关。当藻类 About silver carp nutrition, the author once had the recipe, food selectivity and digestibility and other issues discussed. In view of the fact that some of the issues have not been covered in the preceding paragraphs, some of them were not cited at the time. In addition, there have been many new developments both at home and abroad in the past decade or so. In particular, in recent years, the research on animal nutrition has gradually merged with bioenergetics. There are some meaningful jobs. Therefore, once again make a comprehensive summary of the food problems of silver carp, it is still very necessary. First, the significance of bacteria and decay Bacteria cells are tiny, in the past that only attached to the top of the crumbs can be filtered silver carp meal. In recent years, the work shows that: usually more than half of the planktonic bacteria in water coalesce into flocculent, massive or membranous aggregates, which can be directly filtered by silver carp. Mycoplasma often floats on the water surface, even after being blown down into the water by wind, it can feed on whitefish. Silver carp feeding on bacteria and phytoplankton abundance. When algae