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%。
For improving the green ecological reconstruction results of the ecological system in saline soil degradation, implementing accurate and controlled technology of ecological reconstruction was necessary. In this study, L9 （34） orthogonal test was designed and a Planting Hole Composition Control （PHCC） basic unit based on the factors such as salt - tolerant plants, material used for planting - hole bag, types of filling material, dosage of Zeolite was established. We tested the soil total salt indicators of the different PHCC system, gained the effect of Planting Hole Composition Control on blocking salt of saline soil and the best combination of PHCC and reckoned the blocking salt effect of the best combination. The results showed that, in addition to salt - tolerant plants, all factors on total salt barrier effect were significant, primary and secondary order of effects was： material used for planting - hole bag 〉 types of filling material 〉 dosage of zeolite 〉 salt - tolerant plants. When the best combination was that material used for planting - hole bag selected reverse osmosis membranes, filled peat and added 200g of zeolite, planted Fraxinus velutina, the internal contents of total salt reduced 88.30% - 90.42% less than the external contents, and its confidence interval was 95%.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2017年第3期113-117,共5页
Journal of Arid Land Resources and Environment
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
关键词
植穴结构控制
盐渍土
全盐量
阻盐成效
正交设计
planting hole composition control
saline soil
total salt
effectiveness of blocking salt
orthogonal design
