盐渍土植穴结构控制与穴内阻盐成效

发布时间：2018-04-02 12:13

  本文选题：植穴结构控制　切入点：盐渍土　出处：《干旱区资源与环境》2017年03期

【摘要】：为提高盐渍土退化系统的绿化生态重建成效,须实施以穴尺度为单元的精准控制技术。运用L9(34)正交试验设计方法,构建以耐盐树种、袋质材料、填料种类和沸石用量为自变量的植穴结构控制(PHCC)单元,测定各因素不同水平组合下土壤全盐量,获取各自变量对因变量的影响程度及最佳组合。结果表明:除耐盐树种外,其他因素对植穴内土壤全盐量降低效果均极显著,各因素的影响主次顺序为:袋质材料填料种类沸石用量耐盐树种;如树种选用绒毛白蜡、边缘材料为反渗透膜、衬底材料为草炭、沸石用量为200g这一最优因素水平组合,可使穴内全盐量比穴外减低88.49~90.23%,其可靠性为95%。
[Abstract]:In order to improve the effect of greening ecological reconstruction of salinized soil degradation system, precise control technology based on cave scale should be implemented.The PHCC unit with salt tolerant tree species, bag material, packing type and zeolite content as independent variables was constructed by using L9C34) orthogonal design method. The total salt content of soil was determined under different combinations of factors.The influence degree and the best combination of their variables on dependent variables are obtained.The results showed that, except for salt tolerant species, the effect of other factors on the reduction of total salt content in the soil was very significant. The order of influencing factors was as follows: the amount of zeolite used in bag materials and fillers was salt tolerant tree species, for example, white wax was used in the tree species.
【作者单位】： 天津城建大学环境与市政工程学院;天津市水质科学与技术重点试验室;
【基金】：天津科技支撑计划重点项目(08ZCGYSF02500) 天津市科技计划项目(12ZCZDSF01900)资助
【分类号】：S156.4;S731
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本文编号：1700343