When they're still young, he says, farmers toss animal waste in the ponds and allow the tilapia to feed on the algae bloom that follows.
它们还是鱼苗的时候，他说，农户会往鱼塘里扔动物粪便，并让罗非鱼以由此催生出的大片水藻为食。
Upon how the animal waste effect the environment, this report describes a series of measures which acting on the feed and manure treatment to decrease environmental pollution.
本文在分析畜禽排泄物对环境影响的基础上，对饲料处理及排泄物处理等一系列减少环境污染的措施做了介绍。
Strain 5088 was isolated from the bark, and could be used to turn the waste fibres from flax textile factory into the material which could be displaced as corn of domestic animal feed.
用平板分离法从树皮中选育出“5088号菌种”，使麻纺厂的废弃下脚料转化成可替代饲料中玉米成份的“媲谷菌饲”。
The number of bone dust in animal feed is main reasons for high content of phosphorus in its waste water.
动物饲料中加入大量骨粉是其污水中含磷过高的主要原因，而常规活性污泥法对磷的去除率却很低。
The white sludge of paper mill and waste of chemical fibres factory could also be used as ca and Zn additives of domestic animal feed.
并利用造纸厂白泥、粘胶纤维厂废水处理产生的污泥作饲料钙、锌元素添加剂获成功。
The white sludge of paper mill and waste of chemical fibres factory could also be used as ca and Zn additives of domestic animal feed.
并利用造纸厂白泥、粘胶纤维厂废水处理产生的污泥作饲料钙、锌元素添加剂获成功。
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