高陡岩质边坡植被根系发育地境特征研究

摘要

植被地境是植被生存的物质基础,植被根系是联系植被生长与植被地境条件的纽带.植被在岩体内部的根系分布、形态特征可以反映植被对地境条件的利用情况.在调查实验植被根系发育特征的基础上,依据生态地质学理论,通过分析岩体裂隙内根系生长空间及地境条件(温度、水分、土壤肥分等),结果表明:在高陡岩质边坡条件下,植被根群范围浅,植被根系深入岩体裂隙呈扁平状发育;植被生长的地境条件(温度、水分、土壤肥分等)能满足植被在不同季节的生长发育需求;地境再造技术充分利用岩体裂隙人工再造植物地境条件,为高陡岩质边坡覆绿提供了新思路.%Vegetation below-ground habitat is the material basis for the survival of vegetation,and root system is the bond to the survival of vegetation and vegetation below-ground habitat.The distribution and morphological characteristics of roots in the rock can be reflected on the environmental conditions of utilization of vegetation.In this article,with experimental investigation of vegetation root development,based on the theoretical basis of ecological geology,we made an analysis of the survival space of vegetation in rock fracture and its below-ground habitat conditions (temperature,moisture,soil fields as a nutrient,etc.),to get the following conclusions:Under the condition of high-steep rock slope,vegetation root mass has a shallow range,and it can root into fractured rock deeply with a flat form;the conditions of vegetation below-ground habitat (temperature,moisture,soil fields as a nutrient,etc.) can meet the needs of development of vegetation in different seasons;the technology makes a full use of the artificial conditions of vegetation below-ground habitat in rock fissures,providing a new idea for the high-steep rock slopes recovering green.