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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%。
In order to improve the effectiveness of greening and ecological restoration of saline soil degradation system, accurate control technology based on the hole size is needed. Based on the L9 (34) orthogonal experimental design method, a cell structure control (PHCC) unit was established with salt tolerant species, bagged material, filler type and zeolite dosage as independent variables. Soil total salinity , Access to their respective variables on the impact of variables and the best combination. The results showed that except for the salt-tolerant species, all the other factors had a significant effect on the reduction of soil total salinity in the planting hole. The order of the main factors was: sack material, filler type, zeolite amount, salt-tolerant species, Fluff white wax, the edge of the material is reverse osmosis membrane, the substrate material is peat, the dosage of zeolite is 200g. The total salt content in the hole can be reduced by 88.49% ~ 90.23% and the reliability is 95%.