在食用菌生产过程中，常用高锰酸钾和甲醛进行化学反应达到消毒的目的。甲醛价格低易买到，高锰酸钾价格较高，有的菇农由于没有天平等精确的量具，常常用量不准，消毒效果不理想。笔者在实践中，用铁秤砣代替高锰酸钾。方法是：将适量甲醛倒入剪掉半截的易拉罐里，放入接种箱 In the mushroom production process, commonly used potassium permanganate and formaldehyde for chemical reactions to achieve the purpose of disinfection. Low price of formaldehyde easy to buy, potassium permanganate higher prices, some mushrooms because there is no balance and other accurate measuring tools, often not allowed to use the amount of disinfection is not satisfactory. The author in practice, with iron scale 砣 instead of potassium permanganate. Method is: the right amount of formaldehyde into the cut half of the cans, into the inoculation box