Abstract: Only the practicability and durability was considered for revetment engineering on the medium and small river in China,Usually concrete was employing or reinforced and the ecological funetion of the river was neglected.It broke all kinds of ecological processes,polluted the river,and weakened the ecological function.An engineer method employing Phragmites australis for restoration of the damaged riparian was put forward.It lowered the cost,restored the original communities of P.australi,and was convenient for transportation.The method could not only prevent riparian from collapse and erosion but also introduce the ecological principle to the riparian engineering planning for creating the living space for plants,animals and micro-organism,which can restore the original communities of P.australi rapidly.The method offered an easy way to restore waterfront communities of P.australi using less labor,time and cost.

Key words: Larch plantation, Rhizosphere soil, Organic phosphorus forms, Availability