【摘要】 以吉林省西部苏打盐碱化草原微域内草甸盐土和草甸碱土土壤剖面为研究对象,现场观察测定了土壤发生层次的形态特征,室内分析了土壤各发生层次主要理化性质。结果表明:2种土壤剖面表观形态特征有共性也有个性,理化性状差异大,尤其表现在土壤盐化碱化强度的悬殊。剖面土壤各发生层次的pH、电导率(EC)、碱化度(ESP)值均较高。ESP与总盐量变化趋势一致,土壤含盐量越高,其碱化度值也越高。剖面土壤盐分组成主要以中Na+、CO32-、HCO3-为主,垂直方向上土壤各发生层次变异较大,反映水盐运移速度强度不同,形成微域内2种苏打盐碱土类型。更多还原

【Abstract】 Taking soil profiles of alkaline and saline meadow soil in soda salinization-grassland micro zone in western Jilin province as research object,the morphological characteristics of soil occurrence hierarchy were observed and the main physical and chemical properties of soil occurrence hierarchy were analyzed indoors. The results demonstrated that the morphological characteristics of the two soil profiles had both commonality and individuality,with distinct differences among the physical and chemical properties,especially the great disparity of soil salinization intensity. pH,electrical conductivity(EC) and exchangeable sodium percentage(ESP) of each occurrence of soil in the profiles were all higher. Soil ESP was consistent with the trend of total salinity,and the higher the salt content of soil,the higher the alkalinity value. The composition of soil salinity in the profiles mainly consisted of Na+,CO32-and HCO3-,and Na+,CO32-and HCO3-. In the vertical direction,variation was greater in each soil occurrence layer,indicating different transportation velocity and intensity of water and salt and therefore forming two types of soda meadow soil in micro zone.更多还原