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茶饼是油茶、茶梅或广宁茶等山茶科植物的果实榨油后剩余的残渣,含有一种有溶血作用的有毒的皂角甙,对水生生物有杀灭作用。近年来不少地方采用生茶饼在水中浸泡预防鱼病,收到了一定的效果。但由于个别农户使用不当,出现了大量的毒鱼事件,造成了不应有的损失。现将在生产应用中应注意的事项介绍如下: 1、生茶饼预防鱼病,出现鱼类中毒死亡事件,主要是茶饼中的有毒物质皂角甙经温水浸泡后很快释放出来,使鱼类中毒身亡,因此,用茶饼预防鱼病最好用冷水浸泡,绝不能用开水或温水浸泡茶饼,高温季节的7—9月间不能过多的使用茶饼预防鱼病。 2、严格掌握好茶饼的使用量,具体用量应根据池塘的水深而定,一般每亩水深1米,用1个饼,分成2—3小块分散
Tea cake is tea, tea, or Quang Ninh tea and other camellia fruit oil residue after the residue, contains a hemolysis role of toxic saponins, killing of aquatic organisms. In recent years, many places use raw tea cake soaked in water to prevent fish disease, and received a certain effect. However, due to improper use of individual farmers, there have been a large number of poisonous fish incidents, causing undue losses. Now in the production of applications should be noted as follows: 1, raw cakes to prevent fish disease, fish poisoning deaths, mainly in the tea cake of toxic substances saponin glycosides quickly after soaking in warm water so that Fish poisoning killed, therefore, the best prevention of fish disease with tea cake soaked in cold water, must not use boiling water or warm water soaked tea cake, high temperature season in July-September can not be excessive use of tea cake to prevent fish disease. 2, strict control of the amount of tea cake, the specific amount should be based on the depth of the pond may be, generally 1 meter per mu depth of water, with a cake, divided into 2-3 small scattered