The syngensis of Populus euphratica's sprout is limited by its habitat that the flood land.Becaues of the flood is controled and the flood land is reduced now and causing the forest land of Populus euphratica's young shoot and its Proportion are reduced

so that forest land becomes old and decline day after day.On the other hand

the forest are destroyd to crisis of forest land of Populus euphratica. The ecological condition of oasis is threatened. The regeneration on the forest land of Populus euphratica are difficulty with seed.The coppice of populus euphratica growse from the base of the lumbered tree while its root gradually turns old and decayes and loses its value.If the base is dug up and the shoots from the remaining roots become coppices

then the tree will grow up as a cuttage

therefore renewing the Populus euphratica forest effectually.