Due to it sat tribute such as high salt and strong acid

the mountainous gangue which had under gone spontaneous combustion seriously constrains plant growth.Therefore it is imperative for ameliorating the conditions of gangue mountain tores to revegetation.The abundant and cheap loess was selected as ameliorant

then the ameliorative effect of the diverse ameliorated methods on Festuca elata

Robiniap seudoacacia

A morpha fruiticosa

Platycladus oriental is and Gleditsia horrid a respectively in the mixed gangue and loess was studied aimed to select the plant which has strong resistance and is suitable for the coal gangue mountain and determine the proportion of loess applicat ion.The results showed that the loess as ameliorant was effective for improving the strong acidity

while adding 25 percent of loess into str ong acid gangue with pH 2.8 could raise pH to 6.8.How ever it is unconspicuous for the high salt

adding 75 percent of loess into high salt gangue with salt content of 3.8% could reduce salt content to 1.01%.In addition

Festuca elata

A morpha fruiticosa and Gleditsia horrida were more suitable than Robiniap seudoacacia and Platycladus orientalis.