挂网喷播对边坡生物多样性恢复的影响因素分析  

Analysis of Influencing Factors on Slope Biodiversity Restoration by Net-suspended Spray Seeding

作　　者：郝珖存 董志良[1,2] HAO Guang-cun;DONG Zhi-liang(CCCC Fourth Harbor Engineering Institute Co.Ltd.,Guangzhou 510230,China;CCCC Key Laboratory of Environment and Safety Technology of Transportation Infrastructure Engineering,Guangzhou 510230,China)

机构地区：[1]中交四航工程研究院有限公司,广州市510230 [2]中交集团交通基础工程环保与安全重点实验室,广州市510230

出　　处：《公路》2024年第8期384-391,共8页Highway

基　　金：国家自然科学基金,项目编号32001142。

摘　　要：挂网喷播技术是恢复边坡生态系统的常用手段,但在长时间尺度上,镀锌铁丝网中的金属成分对边坡生物多样性恢复,以及对植被水土保持功能的影响还不清楚。为揭示挂网喷播技术对边坡生物多样性恢复的长期影响,选取了广东省一处20年的人工恢复边坡作为研究对象,并以临近的自然边坡为对照,分析了恢复边坡与自然边坡的植物多样性、土壤细菌多样性的差异以及影响因素。结果表明:(1)恢复边坡与自然边坡的植物多样性无显著性差异,恢复边坡的土壤细菌多样性显著大于自然边坡;(2)人工恢复边坡的土壤含水率和pH值显著高于自然边坡,土壤养分含量也与自然边坡无显著性差异;(3)土壤含水率是影响边坡生物多样性恢复的主要因素之一,土壤水分提升促进了边坡生物多样性的恢复。因此,挂网喷播技术有助于边坡长期的生物多样性恢复和水土保持,本研究结果可为边坡长期生物多样性恢复和水土治理提供科学依据和技术指导。The net-suspended spray seeding technology is a common means of slope ecological restoration,but in the long term,the impact of the metal components in the galvanized wire mesh on the slope biodiversity restoration and on the soil and water conservation are not clear yet.In order to reveal the long-term impact of net-suspended spray seeding technology on slope ecological restoration and soil and water conservation,a 20-year artificially restored slope in Guangdong Province is selected as the research object,and by referring to an adjacent natural slope,the differences of plant diversity and soil bacterial diversity between the restored slope and the natural slope as well as the influencing factors are analyzed.The results show that:(1) There is no significant difference in terms of plant diversity between the restored and natural slopes,and the soil bacterial diversity is significantly greater than that of the natural slope.(2) Soil moisture content and pH value of the artificially restored slope are significantly higher than those of the natural slope,and there is no significant difference in soil nutrient content compared to natural slopes.(3) Soil moisture content is one of the main factors affecting the restoration of slope biodiversity,and improving soil water-holding capacity can facilitate the restoration of slope biodiversity.Therefore,the net-suspended spray seeding technology contributes to long-term biodiversity restoration and soil and water conservation of slopes.The results of this study can provide scientific basis and technical guidance for longterm biodiversity restoration and soil and water management of slopes.

关 键 词：边坡生态系统 生物多样性 水土保持 挂网喷播技术 土壤金属含量 

分 类 号：U416.14[交通运输工程—道路与铁道工程]