石河子莫索湾垦区绿洲耕地自然潜力评价

以GIS技术为基本的分析手段,针对目前土地评价中单元底图选择单一、结果划分人为性强等问题,选择石河子莫索湾垦区150团场为研究区域,以土壤质地、土壤全氮含量、速效磷含量、有机质、土壤盐渍化程度、灌溉水源保证率等为评价要素,对其耕地自然潜力进行了评价。结果表明,1,2,3等地合计占总耕地面积的64.78%,故该地区耕地质量属中等偏上水平,在耕地限制要素中,以土壤有机质和土壤全氮含量最为匮乏,且带有极大的普遍性;而土壤质地、土壤盐分、速效磷限制均以弱限制为主,这说明该团土地利用经营中改良利用难度不大。

Natural Potential Evaluation of Oasis Cultivated Land in the 150 Regiment of Shihezi Reclamation, Xinjiang

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 hm\ 2,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.