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近几年,随着食用菌的发展,辅料市场也日益繁荣。石膏是食用菌生产的重要辅料之一,主要成分是CaSO_4·2H_2O。它不仅可提供食用菌生长所必需的钙源,还能促进堆肥中胶体结构的形成。使堆肥变得更有团粒结构,增强持水力。目前市场上出现了许多假冒的石膏,对食用菌的生产造成极不利的影响。 (一)石膏粉的鉴别 称取1g石膏粉于烧杯中,加入20ml1NHCI溶解,过滤至三角瓶中,加入几滴1％BaCl_2溶液,如有白色沉淀产生,说明样品含有CaSO_4,
In recent years, with the development of edible fungi, accessories market is also increasingly prosperous. Gypsum is one of the important accessories for the production of edible fungi. Its main component is CaSO 4 · 2H 2 O. It not only provides the calcium source necessary for the growth of edible fungi, but also promotes the formation of colloidal structure in the compost. Make composting more granular structure and increase water holding capacity. There are many counterfeit gypsums present on the market, which have a very adverse effect on the production of edible mushrooms. (A) identification of gypsum powder Weigh 1g gypsum powder in a beaker, add 20ml1NHCI dissolved, filtered into a triangular flask, add a few drops of 1% BaCl 2 solution, if there is a white precipitate, indicating that the sample contains CaSO_4,