摘要
为了揭示路基边坡草灌植被护坡作用的本质,提高生态防护效益,2005-2008年选择路基边坡不同土壤类型和草灌植被为研究对象,利用野外径流小区法和数据分析,结果表明:1)确定了项目区的侵蚀性降雨指标;2)确定了降雨侵蚀力被草灌植被消减的量化方法,揭示了植被覆盖度在其中所起的决定作用;3)不同土壤类型边坡植被消减降雨侵蚀力效果。砂姜黑土:紫花苜蓿95.8%、高羊茅95.4%、紫穗槐93.2%、狗牙根89.6%、小叶扶芳藤82.3%;黄黏土:紫穗槐93.9%、紫花苜蓿91.4%、高羊茅90.7%、小叶扶芳藤85.8%、狗牙根83.1%;粉砂土:高羊茅96.1%、紫花苜蓿94.7%、狗牙根94.6%、紫穗槐93.8%、小叶扶芳藤83.2%。研究对路基边坡生态防护具有实际指导作用。
To explore the action nature of grass-shrub vegetation and to increase the benefits of ecological protection of grass-shrub vegetation on subgrade slope,different soil types and vegetation types on subgrade slope were selected and three year experiment was performed from 2005 to 2008.The action nature was studied based on the field runoff-plots and data analysis.The results are as follows：1）The standard of erosive rainfall was determined in the project area;2）A quantitative method for rainfall erosion force which was decreased by grass-shrub vegetation on subgrade slope was determined and the decisive action the grass-shrub vegetation played was explored;3）The effects of decreased rainfall erosion force due to grass-shrub vegetation on subgrade slope were as follows：under condition of Black soil with lime concretions,Medicago sativa was 95.8%,Festuca arundinacea was 95.4%,Amorpha fruticosa was 93.2%,Cynodon dactylon was 89.6%,Euonymus fortuneivar was 82.3%;while under Yellow clay condition,Amorpha fruticosa was 93.9%,Medicago sativa was 91.4%,Festuca arundinacea was 90.7%,Euonymus fortuneivar was 85.8%,Cynodon dactylon was 83.1%;Lastly,under Powder sandy soil condition,Festuca arundinacea was 96.1%,Medicago sativa was 94.7%,Cynodon dactylon was 94.6%,Amorpha fruticosa was 93.8%,Euonymus fortuneivar was 83.2%.The study has an application potential and theoretical value for ecological protection on subgrade slope.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2010年第2期24-29,共6页
Journal of China Agricultural University
基金
国家"十一五"科技支撑计划(2006BAJ10B05)
郑州市科技领军人才基金(096SYJH32108)
关键词
降雨侵蚀力
草灌植被
作用效果
路基边坡
rainfall erosion force
grass-shrub vegetation
action effect
subgrade slope
