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以纵向岭谷区内丽江-大理-保山-龙陵公路沿线作为案例研究区,利用空间替代时间的方法研究公路建设对沿线公路上下坡不同类型土壤质量的影响,并对土壤质量的恢复进行预测.研究表明,公路建设对自然土壤和人工土壤质量都有较大的影响,公路在施工期对土壤质量的影响较大;公路建设对其下坡土壤质量的影响大于上坡,下坡影响范围为距公路200m,上坡为距公路150m.土壤质量受到工程扰动后恢复状况很大程度上和公路的破坏程度、公路的营运时间、当地植被的恢复状况以及土壤有机质、全氮等各要素是密切相关的,其中公路建设是最重要的影响因素.对公路周边土壤质量的恢复情况进行预测,结果表明经过10年的恢复,植被覆盖度恢复到对照的30%时,土壤质量恢复到44%,说明公路周边土壤一经破坏,需要经过相当长的时间来恢复.在公路施工和营运期,应尽可能的控制人为影响以降低干扰.
Based on the case of Lijiang-Dali-Baoshan-Longling Highway in Longitudinal Range-Gorge Region, the paper takes space replacement time as an example to study the impact of highway construction on different types of soil quality along the road and downhill, and to forecast the soil quality recovery The research shows that highway construction has a great influence on the quality of natural soil and artificial soil, and the road has a great influence on soil quality during the construction period. The influence of highway construction on the soil quality of downhill slope is greater than that of uphill and downhill 200m from the highway and 150m from the highway.The quality of the soil after being disturbed by the project largely depends on the degree of road damage, the operation time of the highway, the restoration status of the local vegetation and the soil organic matter, total nitrogen and other factors Closely related, of which road construction is the most important factor.Reasoning the restoration of soil quality around the road, the results show that after 10 years of restoration, the vegetation coverage returned to 30% of the control, the soil quality returned to 44% , Indicating that once the soil around the road damaged, it takes a long time to recover.In highway construction and operation period, should be as much as possible control Impact on people to reduce interference.