【摘要】 应用因子分析方法对民勤县荒漠绿洲过渡带7个样点的土壤容重、土壤有机碳、土壤全氮、土壤电导率、土壤pH值、地下水位、植被盖度、植被种类、植被生物量9个指标进行分析,得出各样地的因子得分,并确定了其荒漠化类型及程度。结果表明,民勤县西南为以地下水位下降为主导的重度沙质荒漠化,中部为以盐渍化为主的轻度盐渍化,东北部为以盐渍化为主的重度盐渍化,沿“绿洲—荒漠”方向荒漠化有加剧—减轻趋势。更多还原

【Abstract】 Factor analysis method was used to analyze 9 indices collected from 7 sampling plots in desert-oasis ecotone in Minqin County,Gansu Province,such as soil bulk density,organic carbon,total nitrogen,electric conductivity,pH,ground water level,vegetation coverage,species and boimass.Factor scores were obtained to assess the type and degree of deseritication.The results showed that severe sandy desertification occurred in southwestern caused by the low ground water,slight salinization occurred in central part,and severe saliniaxtion occurred in northeast part.The degree of desertification tended to be severe toward oasis and ease toward desert in the desert-oasis ecotone.更多还原