盐碱地区公路绿化土壤积盐规律硕士论文7.69MB.docVIP

摘 要 本文针对营口滨海盐碱地区公路树木栽植难成活问题，通过调研路肩土壤积盐情况，采取覆盖措施、隔离措施研究和树种耐盐性探讨，以达到提高公路树木栽植成活率的目的。 运用SPSS分析方法和电导率法对营口地区距海边不同距离的公路路肩垂直三层土壤全盐量、边沟土壤全盐量和盐池水的矿化度进行系统的量化研究；对盐池段公路35个试验点路肩表层0～20cm和覆盖下0～20cm路肩土壤的积盐情况进行对比分析；对盐池段公路应用复合栽植措施后的路肩土壤进行比较分析。在太空堡苗圃，用海水漫灌三、四年生的新疆杨、旱柳、国槐、水蜡和四季丁香地下部，用茚三酮比色法测定各样本的游离脯氨酸的含量，并进行数据分析。 研究表明： 1.营口滨海地区，除盐池段公路边沟土壤是盐渍化土以外，其他试验各路段边沟土壤均为非盐渍化土壤，公路土壤积盐有明显季节规律。 2.在营口滨海地区公路路肩实施覆盖和复合措施是有效的，提高了公路绿化树的成活率，并且这些措施的作用都将延续。 3.海水胁迫下，在试验时期内3种乔木分泌游离脯氨酸的变化依次为国槐的增加值最大，新疆杨次之，旱柳的增加值最小；2种灌木分泌游离脯氨酸变化为水蜡大于四季丁香。单一的游离脯氨酸含量变化不能确定树木的真实耐盐能力，但是，游离脯氨酸是极其重要的树木耐盐生理指标。 关键词　：营口盐碱地区，公路绿化，土壤积盐规律，隔盐措施，树木耐盐性 Abstrack The aim is to address the problem of Yingkou Coastal Highway District Green valley soil, and do the research on the condition and the law of the shoulder soil salt-state systemically.By using the test which use a separation layer and a composite application technology measure in Yingkou Power Line Road Zhuanglin salt pond.To address the selection problem of valley green trees in Highway District,research and discussion were done on the living condition of many trees. Through metric system for a quantitative study,the SPSS analytical methods and the law of conductivity were used to test the salt content of the Yingkou region from different distances along the road shoulders from three vertical layers,side ditches and the salty-water pound.In 35 testing points,we compare the whole salt content of the 0～20cm shoulders surface the soil 0～20cm undergroundn trees growing season,compare and analyse the shoulder soil after using compound planting technological measure.In the Tai’kongbao Nursery,three or four years’ P. alba cv, S. matsudana, Sophora japonica L., L. obtusifolium and S. microphylla were selected 20 respectively. The content of the free Proline of the various samples trees’ roots was tested with Ninhydrin colorimetry,and then analyse it. Soil of the road shoulders in the area belongs to the non-soil salinization sort.except salt pond in the area.The rule about soil accumulating sal