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温带亚湿润地区的流动沙地具有特殊的水分状况。某些风口地段的流动沙丘，植树难以成活，但利用活体杨树枝条扦插沙障，可以成活为林，是一项机械固沙与生物固沙相统一的治沙工程。沙障成林后，生态效益明显：春季大风日，林内风速削减１５％～４１．５％，夏季林内温度降低１～３℃，空气湿度增加１１％～２２％；林下土壤稳定发育，表土层粘粒增加５％～１０％，土壤有机质增加１％，土壤结构形成；沙丘植被逐渐演替，由裸沙地→沙蒿（Ａｒｔｅｍｉｓｉａｄｅｓｅｒｔｏｒｕｍ）＋沙蓬（Ａｇｒｉｏ－ｐｈｙｌｕｍｅｒｅｎａｒｉｕｍ）→沙地萎陵菜（ｐｏｔｅｎｔｉｌａｆｉｌｉｐｅｎｄｕｌａ）＋燕麦芨芨草（Ａｃｈｎａｔｈｅｒｕｍａｖｉｎｏｉｄｅｓ）→贝加尔针茅（Ｓｔｉｐａｂａｉｃａｌｅｎｓｉｓ）＋沙地萎陵菜、苔藓，使整个沙丘形成稳定的林草系统，并成为风口地段的防风屏障，改善了周边的生态环境
Mobile sand in temperate and humid regions has special moisture conditions. Flowing sand dunes in some tuyere lots are difficult to survive. However, using live poplar branches to cut sand barriers can survive as a forest and is a sand control project that integrates mechanical sand fixation with biological sand fixation. After the sand barrier was afforestation, the ecological benefit was obvious. On the spring windy day, the wind speed in the forest was reduced by 15% -41.5%, the temperature in the forest was reduced by 1-3 ℃ and the air humidity was increased by 11% -22% The soil clay formed an increase of 5% ~ 10% in clay, 1% in soil organic matter, and the soil structure was formed. The sand dune vegetation gradually changed from bare sandy land → Artemisiadesertorum + Agrio-phylumerenarium → sandy Potentilla Potentilla anseriensis, Potentilla anserina, Potentilla anseriensis and Stipabaicalensis, and moss in the soil, forming a stable forest-grass system in the whole sand dune and becoming a windbreak barrier in the tuyere area and improving the surrounding ecological environment