The mobile dunes in the sub humid temperate zone pose the specific water regime. Some wind gaps are difficult to support planted trees, but the sand barrier consisted of alive branches of poplar can survive to become the forest. This sand controlling project has achieved the integratation of mechanical sand controlling and biological sand controlling. The obvious ecological benefit can be obtained after the sand barriers becoming forest: in the gale days during Spring, the wind speed can be reduced by 15%￣41 5%; in Summer, the air temperature droped by 1￣3℃,the air humidity increased by 11%￣22%;the soil under the forest grows steadily, the glutinous granules in the surface layer increased by 5%￣10% and the organic matter of soil increased by 1%; The plantation successes gradually from uncovered sandland to Artemisia desertorum+Agriophyllum erenarium to Potentilla filipendla+Achnatherum avinoides to Stipa baicalensis+Potentilla filipendula and moss. At last, a stable forest grass system has become and the surrounding ecological environment has been improved also.
Journal of Desert Research
The sub humid temperate zone Mobile dunes Alive branches of poplar Sand barrier