Located in the cross belt which converges northeaster and northwester , yutian oasis is threatened by the flowing sand , and has the bad natural conditions
于田绿洲位于东北风与西北风的交汇地带，受到流沙侵蚀的危害很严重，自然条件非常恶劣，生态环境异常脆弱，人民的生存环境受到了很大的威胁。
It ' s significant to further the study of the environment evolvement and forming mechani *** , and this helps to open out its ecological essential , protect and develop the oasis , lacated in the cross belt which converge northeaster and northwester , yutian oasis was threatened by the ilowing sand , and has the bad nature conditions the main purpose of the paper is applying fractal theory to research on the change of transitional belt beeen oasis and desert , which is a typical ecosystem in arid zone
而荒漠与绿洲之间的植被带即过渡带则最为敏感、完整地记录了这两大生态系统之间的相互作用与相互转化，深入研究这一特殊地带的环境演变过程、特征及形成机制对于揭示其生态学实质、维护和发展绿洲具有重要的实践意义。于田绿洲位于东北风与西北风的交汇地带，受到流沙侵蚀的危害很严重，自然条件非常恶劣，生态环境异常脆弱，人民的生存环境受到了很大的威胁。