灰色关联分析在不同生态修复模式土壤质量评价中的应用

Application of Grey Correlation Analysis in Different Models of Ecological Restoration in Soil Quality Evaluation

在生态修复的基础上,对土壤进行了物理和化学性质的系统测试,应用灰色关联度法对土壤质量进行综合评价,选择了容重、孔隙度、砂砾含量、田间持水率、有机质、水解性氮、速效磷、速效钾、pH值等项目作为评价指标。不同修复模式土壤质量综合评价值由大到小依次为:未干扰群落(CK2)>油松+荆条群落(C1)>刺槐群落(C3)>果树群落(C4)>杨树群落(C2)>未修复群落(CK1)。研究结果表明:乔灌木混交林生态修复效果最为接近为干扰群落,建议兴隆小流域生态修复模式应采用乔木和灌木混交的模式。

On the basis of ecological remediation,the physical and chemical characters of the soil were systematically tested. The evaluation indexes included soil capacity,extent of porosity,gravel content,field moisture capacity,organic matter,available N,available P,available K,ESP and pH.The evaluation principle was grey system theory with grey correlation method.The order of quality evaluation of relaimation effectiveness was CK2 intact community〉C1 Pinus tabulaeformis＋Vervain community〉 C3 Locust community〉C4 Fruit community〉C2 Populus community〉CK1 non restoration community.The result indicated that the ecological remediation effect of broad-leaved trees and shrubs mixed forest was like the intact community,so we suggested that the broad-leaved trees and shrubs mixed method can be used in the ecological remediation of Xinglong watershed.