Abstract: The areas along the middle reaches of the Yarlung Zangbo River and its tributaries,the Lhasa River and the Nianchu River,are the center of social and economic development in Tibet,and also regions that are seriously affected by aeolian sands.The regions alongside the Yarlung Zangbo River and the Lhasa River,especially around the Gonggar Airport and Lhasa City,covered with rolling sand dunes are serious in hazard in Tibet.Based on systematic analysis and summarization of the successful experience of air-seeding in low altitude regions,feasibility study was carried out of air-seeding in the alpine aeolian desertified land in Tibet from the aspects of precipitation,temperature,sunshine,landform,and wind regime.Results show that the simultaneity of rain and heat,and matching of light,temperature and water in the middle reaches of the Yarlung Zangbo River,greatly favor the growth of plants.Meanwhile,frequent change of wind direction during the early sowing period from the end of May to the beginning of June helps cover the seeds with sand.Now,selection of seeds of native plant species,adaptable to the particular habitat of the alpine aeolian desertified land in Tibet,and solution to the problem of relocation of sown seeds are the two keys to the success of the experiment on air-seeding in Tibet.

Key words: alpine river valley in Tibet, aeolian desertified land, air-seeding experiment, feasibility study