ABSTRACT
An accumulated sand-belt formed along the upwind fringe of the desert oasis in Hexi corridor of Gansu province during the period of desert control for more than half a century. It is due to desertification combating through afforestation and setting up sand barriers. What ecological functions and ecological significance does it have? To find the answers, we conducted a comprehensive study of the sand-belt along the oasis fringe and analyzed the data of the 21 sample accumulated sand-belts. The results showed: 1) The accumulated sand-belt, as a result of desertification combating, has functions of windproof and sand-blocking. It is conducive to desertification combating along the oasis fringe. 2) Height is an important factor indicating the windproof function of the sand-belt. The taller the accumulated sand-belt, the greater the scope of desertification combating. 3) Currently, the accumulated sand-belt in Hexi oasis is still at the developmental stage. As long as it is well protected, sand invasion into farmland can be effectively controlled. In the future, the accumulated sand-belt will be a key point in desertification combating along the oasis fringe, especially on its sand ridge line. In the desert-oasis transitional area, fencing other than additional investment is needed. So less man-power measures will be taken if the sand-belt is taken into full use, which can reduce the fund investment and improve the effect of desertification combating.
