中外公路2025，Vol.45Issue(2)：38-45,8.DOI:10.14048/j.issn.1671-2579.2025.02.004
有机肥施配对香根草种植膨胀土影响的试验研究
Experimental Study of Effect of Organic Fertilizer Application on Swelling Soil for Vetiver Planting
摘要
Abstract
To promote the technical progress and popularization of ecological protection of swelling soil slopes,the characteristic that poor swelling soil is unfavorable to vegetation growth was considered,and a method of improving soil quality by using organic fertilizer was proposed,so as to better play the role of vetiver in protection of swelling soil slopes.The swelling soil from Guangxi Province was used as the research object,and compaction and swelling rate tests on swelling soil with different fertilizer contents were conducted to study the effect of organic fertilizer addition on the characteristics of swelling soil.Meanwhile,the partial factorial experimental design was used to study the effect of different organic fertilizer,slow-release fertilizer,and straw contents on the root system growth of vetiver and swelling of the root-soil complex.The results show that the maximum dry density of swelling soil decreases with the increase in organic fertilizer content,and the optimum moisture content and unloaded swelling rate increase with the increase in organic fertilizer content.The effect of slow-release fertilizer in promoting the early fertilization of vetiver is significant;straw can inhibit swelling,but it does not affect recent root system development.The improvement of root number and swelling rate is the most obvious when the organic fertilizer content is 5%,and the promotion effect of organic fertilizer on root system growth can compensate for its adverse effect on swelling soil.With the increase in organic fertilizer content,the improvement effect of root growth and swelling rate slows down.关键词
膨胀土/有机肥施配/香根草根系/膨胀性/边坡防护Key words
swelling soil/organic fertilizer application/root system of vetiver/swelling/slope protection分类
交通工程引用本文复制引用
陈东炅,王桂尧,欧阳淼,杨颜齐..有机肥施配对香根草种植膨胀土影响的试验研究[J].中外公路,2025,45(2):38-45,8.基金项目
湖南省研究生科研创新项目(编号:QL20220195) （编号:QL20220195）
