杀青苔经济有效的方法是喷洒硫酸铜。但笔者在工作中了解到,有少数用硫酸铜杀青苔,竟造成大量死鱼。主要原因有:一是用了铁、锌容器盛装。硫酸铜是一种重金属盐.其水深液呈弱酸性,一旦与铁、锌金属接触,便产生有毒元素,可毒死鱼类。因此,盛装应在下午5点后用药。四是没注意酸碱度。PH值过高,水的硬度就大,其毒性也大。宜选择PH5以内喷洒。五是量具不准。有的超了剂量。必 A cost-effective way to kill moss is to spray copper sulfate. However, I learned from my work that there are a few who kill moss with copper sulfate and actually cause a lot of dead fish. The main reasons are: First, the use of iron, zinc containers dress. Copper sulphate is a heavy metal salt whose aqueous solution is weakly acidic and, once in contact with iron and zinc metals, produces toxic elements that poison fish. Therefore, costumes should be after 5 pm medication. Fourth, did not pay attention to pH. PH value is too high, the hardness of water is large, its toxicity is also large. PH5 should choose to spray within. Fifth, measuring tools are not allowed. Some over dose. must