【摘要】 土地盐碱化是大庆市土地退化的一种主要形式,也是生态环境恶化的一种表现,严重地制约大庆市的农业发展。在分析1986a、1996a和2001a三个时期的多景陆地卫星TM遥感影像基础上,有效地提取大庆市土地盐碱化信息,并对其数量变化、空间变化特征和变化原因进行了分析。结果表明,在1986a到1996a大庆市的土地盐碱化速度较快,而1996a至2001a速度放慢,土地盐碱化是人类活动驱动为主的土地退化过程。更多还原

【Abstract】 Soil salinization of Daqing City,which is located in Heilongjiang Province of Northeast China,is one type of land degradation and a form of eco-environment deterioration. Exploitation and development of agriculture in Daqing City have been restricted by soil salinization. With the use of soil salinization information extracted effectively from the remote sensing images of three phrases(1986,1996, and 2001),the changes of the amount,spatial characters and the reasons that caused the salinization were analyzed. The results showed that saline-alkali land area has enlarged by a large amount from 1986 to 1996,and the increasing rate of saline - alkali land area from 1996 to 2001 was slower than that from 1986 to 1996. Soil Salinization is the process of degradation which was driven by human activities.更多还原