SOIL IMPROVER BASED ON ACTIVE KAOLIN AND PREPARATION METHOD THEREOF

摘要

PURPOSE: Provided is a soil improver based on active kaolin, which is capable of neutralizing acidified soil, contains abundant trace elements necessary for the growth of crops, and uses waste oyster shells to prevent marine environmental pollution. CONSTITUTION: The soil improver comprises 70-90 wt% of active kaolin formed of 150-mesh particles and 10-15 wt% of active oyster shells activated at a temperature of 850 deg.C. The active kaolin is prepared by sun-drying collected kaolin for 10-15 says, crushing the dried kaolin by a crusher into 150 mesh, and activating the kaolin at a temperature of 500 deg.C. Further, the active oyster shell is prepared by washing oyster shells collected from seashores with water to remove salts and baking the washed oyster shells at a temperature of 850 deg.C for 40-60 minutes.