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首页> 美国政府科技报告 >Fish Production in China. The Rearing of Fish Fry and Fingerlings.
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Fish Production in China. The Rearing of Fish Fry and Fingerlings.

机译：中国的鱼类生产。鱼苗和鱼种的饲养。

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The supply of fish fry and fingerlings is of primary concern to the fish culturing industry. In order to increase the supply, it is necessary to improve rearing techniques. The first of many parts to this program is to improve pond condition. It is recommended that rearing ponds be drained and cleaned once a year. The cleaning process involves treatment with various chemical substances, and simple mud removal (dredging). This reduces the incidence of disease, eliminates pest species and other harmful organisms, and facilitates repair of the pond's structure. Many different chemicals can be used, although lime and bleaching powder seem to be the most effective. The second area to be considered is that of fry nutrition. Different species of fry have different food preferences. For this reason, they can be found in different areas of the pond. For each species of fish, slightly different pond and fertilizer conditions are considered optimal. The basic fertilizers used are grass, cow manure, soybean milk, and peanut cakes. Recent experiments using human sewage have proven very successful, with exciting prospects for the future. A third consideration is the selection of a suitable rearing pond. Characteristics of a good pond are: an ample water source, appropriate size and depth, circular shape, level bottom, non-leaking, and plenty of sunlight.

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