【作者】 侯培强；

【导师】 陶玲；

【作者基本信息】 兰州交通大学 ， 水文学及水资源， 2008， 硕士

【摘要】 本文以造纸废水灌溉的沙漠生态林为研究对象,探讨了造纸废水灌溉沙漠生态林对沙漠植物、沙漠土壤以及沙漠生态林地区地下水的影响。通过对造纸废水灌溉不同年限以及不同生长部位的沙漠植物体内钠离子含量进行研究,结果显示:红柳、沙枣、新疆杨相同生长部位的钠离子含量均随着灌溉年限的增加而增大,并且与土壤中钠离子含量呈显著正相关;红柳叶片中钠离子含量明显高于根系中钠离子含量,说明盐碱胁迫下红柳叶片聚盐性大于根系聚盐性,红柳叶是钠离子累积和外排的主要部位;沙枣叶片中钠离子含量明显高于根系中钠离子含量,说明盐碱胁迫下沙枣叶片聚盐性大于根系聚盐性,沙枣叶是钠离子累积的主要部位;杨树根中钠离子含量明显高于树叶中钠离子含量,说明根对钠离子具有较强的选择吸收性,是钠离子积累的重要场所。通过对不同灌溉年限以及不同土壤深度的土壤物理、化学以及营养成份等进行研究,结果显示:沙漠土壤在造纸废水灌溉条件下,相同土壤深度的土壤容重随着灌溉年限的增加逐渐降低;相同土壤深度的土壤孔隙度随着灌溉年限的增加逐渐增加;在对照区(0年),土壤容重随着土壤深度的增加逐渐增加,土壤孔隙度随着土壤深度的增加逐渐降低。相同土壤深度的土壤有机质、总氮、总磷等营养成份均随着灌溉年限的增加逐渐增大;相同灌溉年限的土壤有机质、总氮、总磷等营养成份均随着土壤深度的增加逐渐降低。相同土壤深度的土壤钠离子含量和土壤全盐量随着灌溉年限的增加逐渐增加;相同灌溉年限的土壤钠离子含量和全盐量随着取土深度的增加而增加。相同土壤深度的土壤pH值随着灌溉年限的增加逐渐减小;相同灌溉年限的土壤pH值随着取土深度的增加而减小;土壤微生物数量随着灌溉年限的增加显著增加。通过对沙漠生态林地区地下水水样分析,结果表明,各个指标均符合地下水质量标准Ⅲ类,可以看出污水灌溉并没有对地下水造成污染。研究结果可以为造纸废水资源化利用提供理论指导和实践依据。更多还原

【Abstract】 Based on the desert ecological forest irrigated by papermaking wastewater, the paper discusses the effects of desert ecological forest irrigated by papermaking wastewater on desert plant, desert siol and groundwater in the area of desert ecological forest.Through on the research of sodium ion content of desert plant in different irrigation yearsand in different vegetal part, the result shows that, sodium ion content of Tamarix chinensis, Elaeagnus angustifolia, Populus alba increase gradually with the increased irrigation years in the same vegetal part, and sodium ion content of the three plants are positive correlation between sodium ion content of soil. Sodium ion content of leaf in Tamarix chinensis Lour is higher than sodium ion content of root, so leaf has better sodium ion tolerance than root, leaf is the main site of sodium ion accumulation and excretion. Sodium ion content of leaf in Elaeagnus angustifolia is higher than sodium ion content of root, so leaf has better sodium ion tolerance than root, leaf is the main site of sodium ion accumulation. Sodium ion content of root in Populus alba is higher than sodium ion content of leaves, the root of Populus alba is a important site which can accumulate more sodium ion.Through on the research of soil physical property, soil chemical quality and soil nutrition element in different irrigation years and in different deepness of soil, the result shows that soil bulk density decreases gradually with the increased irrigation years in the same depth of soil, however, soil porosity increases. In comparison area (0 year), soil bulk density increases with the increased depth of soil, however, soil porosity decreases. Soil organic matter, total nitrogen and total phosphorus decrease gradually with the increased depth of soil in the same irrigation year; while increasing gradually with the increased irrigation years in the same depth of soil. Sodium ion and total salt content decrease gradually with the increased irrigation years in the same depth of soil, however, soil pH value increases. Soil pH value decreases gradually with the increased depth of soil in the same irrigation year, however, sodium ion and total salt content increases. Soil microbe increases remarkably with the increased irrigation years.Through on the research of groundwater in the area of desert ecological forest, the result shows that all indexes accord with the criterion of groundwater quality (III), and the groundwater is not polluted by wastewater irrigation. The research can provide theoretical guidance and practice basis for pulp and paper wastewater utilization.更多还原