两种复垦地土壤理化性质的研究

利用粉煤灰和煤矸石作为充填基质充填沉陷地覆土造地是治理采煤塌陷区的重要方法之一.为研究煤矸石、粉煤灰充填复垦方式对土壤理化性质的影响,本文以淮南上窑粉煤灰场复垦地和新庄孜矿煤矸石充填复垦地为研究对象,分别对粉煤灰复垦地土壤样品、煤矸石复垦地土壤样品和对照地块土壤样品的土壤pH值、土壤含水量、土壤有机质、水解氮、速效磷、有效钾含量、冬小麦产量等指标监测分析.结果表明,复垦土壤pH值大于对照土壤样品,粉煤灰充填复垦土壤呈强碱性,煤矸石充填复垦土壤pH值接近对照土壤;粉煤灰充填复垦地粉煤灰层土壤含水量明显大于对照土壤样品,煤矸石充填复垦地煤矸石层土壤含水量明显低于对照土壤样品;复垦土壤有机质、水解氮、速效磷、有效钾含量、冬小麦产量低于对照土壤样品.粉煤灰充填复垦土壤水解氮含量、有效钾含量低于煤矸石充填复垦土壤,速效磷含量高于煤矸石充填复垦土壤.

Study on Physical and Chemical Properties of Soil in Two Kinds of Reclaimed Lands

One of the important methods to manage the mining subsidence area is filling reclamation with fly ash and coal gangue. This text monitor p H , soil water content, soil organic matter, hydrolyzable nitrogen, rapid available phosphorus,a- vailable potassium, wheat output of fly ash reclamation land soil sample, coal gangue reclamation land soil sample, control soil sample. The results show that pH of reclaimed soil big than control soil sample. Fly ash reclamation land soil sample is alkaline. Coal gangue reclamation land soil sample is close to control soil sample. The soil water content of fly ash layer is significantly greater than control soil sample. The soil water content of coal gangue layer is significantly less than control soil sample. Soil organic matter content, hydrolyzable nitrogen, rapid available phosphorus, available potassium,wheat out- put of reclamation soil is less than control soil sample. Hydrolyzable nitrogen,available potassium of reclamation soil filling with fly ash is less than reclamation soil filling with coal gangue,and the rapid available phosphorus content is greater than reclamation soil filling with coal gangue.