秦王川南部表层土壤盐渍化特征及其与植被发育的关系  

Relationship between surface soil salinization features and vegetation development in southern Qinwangchuan basin

作　　者：马灿[1] 胡雅杰[1] 薛天柱[1] 魏国孝[1] 朱锡芬[1] 张旭昇[1] 

机构地区：[1]兰州大学西部环境教育部重点实验室,甘肃兰州730000

出　　处：《甘肃农业大学学报》2011年第6期104-108,共5页Journal of Gansu Agricultural University

基　　金：国家自然科学基金创新群体项目(40721061)

摘　　要：在对秦王川南部地区表层土壤含盐量分析的基础上,结合遥感数据提取的NDVI值,研究了该地区土壤盐分的特征及其与植被发育之间的关系.结果表明:研究区内1/3样点存在盐渍化现象(含盐量在2～4dS/m),仅部分局部地区属于中度盐渍化(QW11含盐量为7.09dS/m);土壤盐分含量总体上呈现出由北至南逐渐增大的趋势;在样点剖面0～20cm范围内,土壤盐分随深度增加而增大,而10～20cm深度范围内,土壤盐分含量比较稳定;随着含盐量的增大,NDVI值逐渐减小.Based on the analysis of surface soil salinity in southern Qinwangchuan basin,combined with NDVI values extracted from remote sensing data,this paper focuses on the characteristics of the surface salinization and the connection between the soil salinity and vegetation growth.The results indicate that there is salinization（with soil salinity within the scope 2~4 dS/cm） in part of the study area,and only a few areas are moderate salinization（with soil salinity at 7.09 dS/cm）.Within the soil section（0~20 cm）,the mean soil salinity increases with the rising depth.The soil salinity almost keeps at a stable level where the depth is between 10 and 20 cm.The soil salinity rises gradually from north to south.With the growing of soil salinity,the NDVI value decreases gradually.

关 键 词：土壤盐渍化 土壤含盐量 标准化植被指数 秦王川南部 

分 类 号：S151[农业科学—土壤学]