廊道式工程建设对土壤生态环境影响的meta分析

Impacts of linear project construction on soil eco-environment:A meta analysis

廊道式工程建设对沿线区域生态环境造成不可避免的影响,定量化研究廊道式工程建设对沿线地区土壤生态环境的影响具有重要意义。本文基于meta分析方法,研究了3种廊道式工程(输油/气管道、公路和铁路)对土壤生态环境的影响。结果表明,廊道式工程对土壤理化性质产生一定的影响:3种工程周边的土壤养分指标和土壤含水量的结合效应值均<1;管道工程建设对土壤有机质、有效氮、总氮、总磷和pH的扰动达到显著水平(P<0.05);公路显著降低周边土壤总磷、含水量和CEC的含量(P<0.05),同时公路显著增加了周边土壤容重和pH,结合效应值分别达到1.2265和1.1649,公路造成周边土壤Cu、Zn、Pb、Ni、Cd、Cr和As的显著污染(P<0.05);铁路显著降低沿线土壤有机质和总氮的含量(P<0.05),并且导致周边土壤Cu、Zn、Pb、Cd的显著污染(P<0.05)。

Because of the unavoidable impacts of linear project construction on regional ecology, it is of significance to quantitatively research the impacts of this project construction on the soil ecological environment along the related regions and to select the potential countermeasures. In this paper, meta analysis was adopted to analyze the impacts of three kinds of linear project construction, i.e., pipeline, highway, and railway constructions on the peripheral soil ecological environment. These three project constructions had definite impacts on the soil physical and chemical properties. Their impact sizes for the soil nutrients and moisture contents were less than 1. Pipeline construction had significant impacts on soil organic matter, total and available nitrogen, and total phosphorus contents and pH value （P〈0.05）; highway construction decreased soil total phosphorus and moisture contents and CEC but increased soil bulk density and pH value significantly （P〈0.05）, and gave rise to the severe soil pollution by heavy metals Cu, Zn, Pb, Ni, Cd, Cr, and As （P〈0.05）; railway construction decreased soil organic matter and total nitrogen contents significantly （P〈0.05） and increased the soil pollution by Cu, Zn, Pb, and Cd （P〈0.05）.