Abstract：A relative applied technique research is developed in Minqin desert area to probe into the effect of water saving,increasing product and its sand fixing of plant growth regulator agent and sand-fixing agent and to save dying surface vegetation and restore regional ecological balance.The results indicated that plant growth regulator agent and sand-fixing agent have some moisture conservation ability to make the soil moisture content in tillage layer of farmland increase by 1.0%-1.5%.Average soil moisture content of forest land of Haloxylon Ammodendron of 100cm deep increase by 2.3% and that of shifting dunes of 80cm deep increase by 3.5%3.9%.The both growth of wheat and corn have been delayed by capsule seed treatment,but the yield of wheat increases by 12.2%,corn 2.0%.The growth and yield of seed melon with root treatment by the agent is larger than that of contrast ones,taproot growth increases by 9.1cm and main vine 33cm,average increased yield rate is 11.5%.After treatment on degraded vegetation's roots by plant growth regulator agent,the new shoot growth of Haloxylon Ammodendron could increase by 0.6-3.0cm and crown width of Nitraria sphaerocarpa has increase by 45.1-96.2cm.Through the sand-fixing agent treatment,thickness of sand crust in dune area has increased by 0.20.3cm than that of the natural crust,dune wind erosion is 0.5-0.8 times smaller than that of the natural dunes and vegetation coverage of dunes has increased by 1.9%-2.7% than that of natural dunes.
2006, Vol. 4 
