21 research outputs found

    Effects of EN-1Solidifying Agent on Saturated Hydraulic Conductivity of Four Soils

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    为了研究EN-1土壤固化剂的固化性能,通过室内模拟实验对杨凌、安康、安塞和靖边4种土壤在不同固化剂掺量、养护龄期的固化进行了土壤饱和导水率影响的研究,结果表明,微量掺加EN-1固化剂就可以明显减小黄棕壤和土的饱和导水率,饱和导水率随着培养龄期的增加而下降,当培养期大于14d时土样的饱和导水率近似为0;黄绵土与风沙土的饱和导水率随着固化剂掺量增加而减小,培养龄期增大,饱和导水率随之下降,固化剂掺量为1%,培养期为28d时黄绵土和风沙土的饱和导水率最低。In order to estimate soil solidification performance of EN-1solidifying agent,saturated hydraulicconductivities for four types of soils collected from Yangling,Ankang,Ansai,and Jingbian in Shaanxi Province were investigated by indoor simulation test with different solidifying agent contents and curing ages.Results indicated that traces of EN-1solidifying agent added in the tests can considerably reduce saturated hydraulic conductivities of yellow brown soil and Lou soil.The saturated hydraulic conductivities decreased rapidly with the increased curing age and dropped to zero when curing age was more than 14days.Saturated hydraulic conductivities of loessal soil and sandy soil decreased not only with the increased addition of the solidifying agent,but also with the increased curing age.The saturated hydraulic conductivities of loessal soil andsandy soil were the lowest at the 1% EN-1solidifying agent after 28days curing

    Effects of EN-1Solidifying Agent on Saturated Hydraulic Conductivity of Four Soils

    No full text
    为了研究EN-1土壤固化剂的固化性能,通过室内模拟实验对杨凌、安康、安塞和靖边4种土壤在不同固化剂掺量、养护龄期的固化进行了土壤饱和导水率影响的研究,结果表明,微量掺加EN-1固化剂就可以明显减小黄棕壤和土的饱和导水率,饱和导水率随着培养龄期的增加而下降,当培养期大于14d时土样的饱和导水率近似为0;黄绵土与风沙土的饱和导水率随着固化剂掺量增加而减小,培养龄期增大,饱和导水率随之下降,固化剂掺量为1%,培养期为28d时黄绵土和风沙土的饱和导水率最低。In order to estimate soil solidification performance of EN-1solidifying agent,saturated hydraulicconductivities for four types of soils collected from Yangling,Ankang,Ansai,and Jingbian in Shaanxi Province were investigated by indoor simulation test with different solidifying agent contents and curing ages.Results indicated that traces of EN-1solidifying agent added in the tests can considerably reduce saturated hydraulic conductivities of yellow brown soil and Lou soil.The saturated hydraulic conductivities decreased rapidly with the increased curing age and dropped to zero when curing age was more than 14days.Saturated hydraulic conductivities of loessal soil and sandy soil decreased not only with the increased addition of the solidifying agent,but also with the increased curing age.The saturated hydraulic conductivities of loessal soil andsandy soil were the lowest at the 1% EN-1solidifying agent after 28days curing

    三江平原典型小叶章湿地土壤微生物量碳的动态变化特征

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    以三江平原不同群落典型小叶章沼泽湿地为研究对象,研究湿地土壤微生物量碳(MBC)的季节变化特征及剖面分布规律,探讨湿地土壤有机碳、根系生物量、降水量、湿地水分与MBC的关系,分析湿地土壤MBC变化的影响因素.结果表明:草甸小叶章(XCD)湿地和沼泽化小叶章(XZZ)湿地表层土壤MBC含量的变化特征均表现为春、秋季较高,夏季较低.XZZ湿地0~20cm土壤MBC含量明显高于XCD土壤,而20~60cm土壤MBC含量之间无显著差异.2类小叶章湿地土壤MBC含量均表现为自上层向下显著递减的趋势.同一时期内不同小叶章群落湿地MBC含量与相应土壤层次根系生物量均存在显著线性相关关系,相关系数r在0.8319~0.9959之间.研究表明XZZ湿地土壤有机碳的累积量较高,其上层生物活性碳高于XCD湿地土壤.土壤MBC的分布特征和季节变化主要受到土壤有机质含量、水分特征、地下根系生物量以及温度、降水等条件的影响
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