民勤县荒漠绿洲过渡带土地荒漠化类型判定  

Analysis of Desertification Types on Desert-oasis Ecotone in Minqin

作　　者：柴成武[1] 蒋志荣[1] 徐先英[2] 唐卫东[2] 柴薇薇[1] 李禄军[1] 李彩霞[1] 

机构地区：[1]甘肃农业大学林学院,甘肃兰州730070 [2]甘肃省治沙研究所,甘肃武威733000

出　　处：《西北林学院学报》2006年第6期12-16,共5页Journal of Northwest Forestry University

基　　金：甘肃省自然科学基金项目(038038073)

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。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 ob- tained 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.

关 键 词：民勤 过渡带 荒漠化类型 因子分析法 

分 类 号：Q948.113[生物学—植物学]