论文部分内容阅读
【目的】新疆渭干河-库车河三角洲绿洲农业生产资源丰富,但遭受着土壤盐渍化的严重威胁。进行盐渍地时空动态变化特征分析及提出盐渍地防治措施,可以为区域农业及经济的可持续发展提供科学借鉴。【方法】采用基于知识决策树分类法构建模型提取研究区19892、001和2007年盐渍化土壤专题信息,使用动态度模型分析研究区土壤盐渍化的动态变化。【结果】渭-库绿洲在1989~2007年,盐渍地总面积增加了192.76 km2。1989~2007年间盐渍地总面积的动态度达到0.232%。【结论】近20年间研究区土壤盐渍化呈现不断扩展的趋势,盐渍化危害程度加深。结合渭-库绿洲灌区的发展现状和区域特点,提出了水利工程、农业、生物和化学等方面的土壤盐渍化治理改良措施。
【Aim】 The Weishgan River-Kuqa River delta oasis in Xinjiang is rich in agricultural production resources, but it suffers serious threats of soil salinization. Analyzing the characteristics of spatio-temporal dynamic change of saline land and proposing the prevention and control measures of saline land can provide scientific reference for the sustainable development of agriculture and economy in the region. 【Method】 Based on the knowledge-based decision tree classification method, a model was constructed to extract thematic information of the salinized soil in the study area 19892,001 and 2007, and the dynamic degree model was used to analyze the dynamic changes of soil salinization in the study area. 【Result】 From 1989 to 2007, the total area of saline land increased by 192.76 km 2 in the Wei-library oasis. The dynamic degree of the total area of salted land reached 0.232% from 1989 to 2007. 【Conclusion】 Soil salinization in the study area has been expanding continuously in recent 20 years, and the degree of salinization is deepening. Combined with the development status and regional characteristics of Wei-Ku-oasis irrigation area, some improvement measures of soil salinization in water conservancy project, agriculture, biology and chemistry are put forward.