目前,国外工厂化生产蘑菇都采用含水量高、持水性好、孔隙度大的泥炭作为覆土材料。国内应用的覆土材料大致有五种,即粗细土、混合土、河泥砻糠土、细泥砻糠土、发酵土。细泥砻糠土和发酵土是根据我国目前的蘑菇栽培方式和农村条件研制出来的两种制作简便和有良好覆土效果的覆 At present, foreign factories produce mushrooms using high water content, good water holding capacity, porosity of peat as cover material. There are roughly five types of soil-covering materials used in the country, namely, coarse and fine soil, mixed soil, river mud, soil, fine mud, soil and fermented soil. Fine clay 砻 糠 soil and fermented soil is based on China’s current mushroom cultivation methods and rural conditions developed two kinds of production is simple and good soil cover effect