南方红壤丘陵区公路工程建设对土壤养分流失的影响  

Effects of Highway Construction on Soil Nutrient Loss in Hilly Red Soil Region of South China

作　　者：赵青 周一龙 周佳 刘克非[3] ZHAO Qing;ZHOU Yilong;ZHOU Jia;LIU Kefei(Hunan Expressway Group Co.,Ltd.,Changsha,Hunan 410022, China;Hunan Road & Bridge Construction Group Co.,Ltd.,Changsha,Hunan 410018,China;Central South University of Forestry & Technology,Changsha,Hunan 410004,China)

机构地区：[1]湖南省高速公路集团有限公司,湖南长沙410022 [2]湖南路桥建设集团有限责任公司,湖南长沙410018 [3]中南林业科技大学,湖南长沙410004

出　　处：《公路工程》2022年第2期188-192,共5页Highway Engineering

基　　金：湖南省交通运输厅科技进步与创新计划项目(201908)。

摘　　要：为明确红壤丘陵区公路建设对土壤养分流失的影响规律,采用现场调研与测试、人工模拟降雨淋蚀试验等方法,研究了自然和人工模拟降雨2种条件下路域土壤养分流失变化规律与特征。结果表明:与表面裸露土壤相比,植被盖度良好、表面压实或覆盖的土壤有利于减少水侵,其对土壤养分变化控制也较好,有机质、氮素、磷素含量变化均为最小。路域土壤表土堆放方式中,养分保护效果由强到弱依次为:经济林地>山地>弃土场>取土场>农耕地。地形条件对土壤养分流失影响较大,除磷素外,公路建设项目路域土壤坡度越陡,养分流失越快。In order to clarify the effect of highway construction on soil nutrient loss in red soil hilly area,the change rules and characteristics of soil nutrient loss in road area under natural and artificial simulated rainfall were studied by field investigation and test and artificial simulated rainfall leaching test.The results show that compared with bare soil,the soil with good vegetation coverage,surface compaction or mulching is beneficial to reduce water invasion,and has better control over soil nutrient changes,with minimum changes in organic matter,nitrogen and phosphorus content.In the stacking mode of topsoil in road area,the nutrient protection effect was from strong to weak successively as followseconomic forest land>mountain land>spoil ground>borrow area>agricultural land.Topographic conditions have great influence on soil nutrient loss.In addition to phosphorus,the steeper the soil slope,the faster the nutrient loss.

关 键 词：红壤丘陵区 公路工程 土壤养分流失 人工模拟降雨 

分 类 号：U412.22[交通运输工程—道路与铁道工程]