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Effects of highway construction on soil quality in the Longitudinal Range-Gorge Region in Yunnan Province

机译：云南公路纵谷地区公路建设对土壤质量的影响

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摘要

The impact of highway construction upon surrounding ecosystems in the Longitudinal Range-Gorge Region of Southwestern China was detected based on field survey and experimental analysis. We conducted a study on Dali (from Dali City to Lijiang City) provincial road, Dabao (from Dali City to Baoshan City) highway and Baolong (from Baoshan City to Longling County) highway in the Longitudinal Range-Gorge Region to detect the effect of highway construction on surrounding soil quality using the method of space-for-time substitution, and predicted remediation of surrounding soil quality. The results showed that: (1) The effect of highway construction on both natural and cultivated soil quality is significant, and the effect is more significant in the period of highway construction than the period of highway in use. (2) The effects of highway construction is more apparent on downslope than upslope, and effect range was 200 m on downslope, while 150 m on upslope. (3) Soil remediation is mainly related to effect extent of highway construction, highway service time, vegetation restoration, soil organic matter and soil total nitrogen, among which, highway construction is the most important factor. (4) When vegetation coverage can be restored to 30% of the original condition, soil quality can be remedied to 44% of the original condition after 10 years, indicating that soil fertility remediation is rather difficult once it is destroyed.
机译：通过实地调查和实验分析，发现了公路建设对西南纵岭峡谷地区周围生态系统的影响。我们研究了纵向山脉峡谷地区的大理（从大理市到丽江市）省道，大宝（从大理市到宝山市）高速公路和宝龙（从宝山市到龙陵县）高速公路。公路建设采用时空置换法对周围土壤质量进行预测，并对周围土壤质量进行预测修复。结果表明：（1）公路建设对自然和耕作土壤质量的影响均显着，并且在公路建设阶段的影响要大于在用公路时期。 （2）公路建设对下坡的影响比上坡更明显，下坡的影响范围为200 m，上坡的影响范围为150 m。 （3）土壤修复主要与公路建设的影响程度，公路服务时间，植被恢复，土壤有机质和土壤总氮有关，其中公路建设是最重要的因素。 （4）如果植被覆盖率可以恢复到原始状态的30％，则可以在10年后将土壤质量恢复到原始状态的44％，这表明一旦破坏了土壤肥力，其修复就相当困难。

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