Liquid film is a newly-developed organic macromolecular compound. A thin, solidified crust forms after the diluted compound was sprayed on the soil surface. It was widely reported that after the soil is treated, soil temperature, moisture and porosity increases, and bulk density does not increase. As a result, soil physical, chemical and biological properties differ when compared to non-treated soil. Soil microorganisms and enzymes are main components of soil biochemical properties. They play an important r...