渭干河-库车河三角洲绿洲土壤盐渍化动态分析及防治措施

[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1989、2001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.

Dynamic Analysis and Prevention and Control Measures of Soil Salinization in the Delta Oasis of Weigan and Kuqa Rivers

【Objective】The agriculture production resources of the delta oasis of Weigan and Kuqa rivers in Xinjiang is rich,but suffer from the grievous threaten of soil salinization.Analysis of the spatial-temporal dynamic change of soil salinization and putting forward the prevention and control measures can offer scientific experience for the sustainable development of regional agricultural and economy.【Method】The soil salinization information in the research area for the year 1989,2001and 2007 was extracted from the model which was built based on the method of decision tree classifier,and used dynamic degree model to analyse the dynamic change of soil salinization.【Result】The total area of soil salinization increased 192.76 km2 and the dynamic change of soil salinization reached 0.232% from 1989 to 2007 in the delta oasis of Weigan and Kuqa rivers.【Conclusion】In the recent 20 years,soil salinization increased constantly,and the harm degree aggravated.Combined with the development of the delta oasis of Weigan and Kuqa rivers and district characteristic,this paper put forward measures for the control and improvement of soil salinization from the aspect of water conservancy project,agriculture,biology and chemistry.