摘要
通过对裸岩边坡模型的研制,设计边坡坡度、种植槽类型、基质类型和绿植配合类型等模拟条件,建立9组模型并开展试验研究,以获取绿植生长发育的影响因素及相关数据,进而探索岩质边坡覆绿技术。具体试验结果包括:(1)在Ⅰ型种植槽土壤含水率较高、不施基肥时,平度株高随坡度改变的影响不显著,但Ⅰ型种植槽在土壤含水率较低、不施基肥时,45°的边坡坡度下绿植平均株高较60°和75°的坡度下平均株高高出12%~30%。Ⅱ型种植槽无论土壤含水率高或低,在施加基肥时,坡度变化对平均株高的影响均不显著;(2)土壤层厚度不同程度地影响绿植的萌芽与生长,试验表现在土壤层厚度3.5cm左右绿植有较大的平均高度,施加基肥、满足绿植萌芽并生长且土壤含水率不一的情况下,Ⅰ型种植槽模型中绿植平均株高较Ⅱ型种植槽中绿植高8%~147%;(3)Ⅰ型种植槽在三种试验坡度且土壤含水率不一的情况下,施加基肥的绿植平均株高比不施基肥的绿植高10%~163%。
Through the development of the exposed rock slope model,the simulation conditions of slope ratio,planting groove type,matrix type and green plant matching type are designed,9 groups of models are established and experimental studies are carried out to obtain the influencing factors and relevant data of the growth and development of green plants,so as to explore the greening technology of the rock slope.Specific test results include:(1)in the typeⅠ planting groove,when the soil moisture content is higher and without basal dressing,there is no significant change in terms of the average plants height with the change of slope,but for theⅠtype planting groove when the soil moisture content is low and without basal dressing,the average plant height under 45°slope is 12%~30% higher than that under than 60°and 75°slope.For theⅡtype planting groove,regardless of the soil moisture content is high or low,when applying basal,the influence of slope change on average plant height is not significant.(2)The soil thickness can affect the germination and growth of plants to different extent.The test shows that the average height of green plants is relatively high when the soil thickness is about 3.5 cm.When basal is used,the green plant germination and growth conditions are satisfied and under the condition of different soil moisture content,the average plant height inⅠtype planting trench is 8%~147% higher than that ofⅡtype.(3)The plants in Type Ⅰ planting groove with the three test slope and under different soil moisture content is 10%~163% higher when applying basal than not applying basal.
作者
王念秦
梁琬坤
WANG Nian-qin;LIANG Wan-kun(College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China)
出处
《公路》
北大核心
2020年第7期286-293,共8页
Highway
基金
国家自然科学基金资助项目,项目编号41572287
陕西省科技统筹创新工程计划项目,项目编号2016KTCL03-19。
关键词
裸岩边坡
边坡覆绿
试验研究
模型研制
坡度
exposed rock slope
overlying green on slope
experiment model
model developed
slope
