关键词: 绿洲耕地, 自然潜力评价, 石河子, 莫索湾

Abstract: Using GIS technology as the fundamental means of analysis,aiming at the existing problems,that is,the unitary of the base map choice in land assessment,the strong subjectivity in the outcome of division,the author chooses 150 regiment which located in Shihezi reclamation as the research region and evaluates the natural potential of soil.In evaluation process,the soil texture,soil salt salinity,soil organic matter,soil nutriment,soil rapidly available phosphorus and insurance rate of irrigation water are all choised as evaluating factors.The result of evaluation shows that the tatal quality area of 1st,2nd and 3rd grade cultivated land reached 12 831.4 hm²,amounting 64.78% of all cultivated land,which means that the quality of cultivated land in 150 regiment is better.In different sub regions,the middle part has the highest cultivated land quality and the north part the lowest.In the restrictive factors of cultivated land,the most deficient is the organic matter and soil nutriment.The main limiting factors of cultivated land quality are soil texture,salt content,and soil rapidly available phosphorus,but their degrees are all weak,which shows that the difficulty in improving the soil is not very great.

Key words: oasis cultivated land, natural potential evaluation, Xinjiang