粉煤灰在土壤改良和土地整治中的作用

粉煤灰是一种可利用的资源，在我国闲置贮存量巨大。介绍了粉煤灰的理化性质，综述了粉煤灰在土壤改良中的作用，如改善土壤物理性质、增加土壤营养成分、影响土壤生物活性、治理盐碱地以及修复治理重金属污染。粉煤灰也可用于土地整治工程，改变土壤结构，增加土壤的生产力，是高质量完成土地整治工程的有力保障。但是，粉煤灰大量使用前，仍需重视其性质的检测及预处理。 

Role of Coal Fly Ash in Soil Improvement and Land Consolidation

There is a large number of coal fly ash in our country，and it is a kind of available resources.Physical and chemical properties of coal fly ash were introduced.Role of soil improvement was summarized，such as improving soil physical properties，increasing soil nutrients，affecting soil biological activity，controling saline alkali land，and repairing and controling heavy metal pollution.Coal fly ash can also be used for land reclamation project to change soil structure and increase productivity of soil.It was a high quality completed land engineering guarantee.However，before use of coal fly ash，it still needs pretreatment and detection of nature.