水蛭养殖的生长发育需要五大营养物质：
The growth and development of leech farming needs five nutrients: 
蛋白质、脂肪、糖类、无机盐和维生素，水蛭在不同的生长发育阶段或不同的生活环境中，对营养物质的需求也不一样。水蛭种苗http://www.jntcyz.com/ 
Protein, fat, sugar, inorganic salt and vitamin, leeches in different growth stages and different life environment, the need for nutrients is different also. 
因此，歹充分了解水蛭在不同生长发育阶段的营养需求以及各种营养物质的作用特性，对促进水蛭的健康成长，提高产量有着重大的意义。

Either good or bad, therefore, fully understand the leeches in different growth stages of the nutritional requirements and characteristics of different types of nutrients, to promote the healthy growth of the leech, increased production is of great significance. 

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