共查询到19条相似文献,搜索用时 187 毫秒
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指出了近年来随着我国公路建设等工程活动的急剧增加,大规模的裸露边坡开始出现,对边坡土体的结构和原有植被产生了破坏,极易造成水土流失、边坡失稳、生态环境破坏等不良影响。边坡的生态防护不仅可以加固边坡土体,还能起到美化生态环境的作用。对边坡生态防护的主要方法进行了总结,并从水文效应和力学效应2个方面阐述了其防护机理。在此基础上,探讨了生态护坡技术目前研究中存在问题及发展的趋势。以供参考。 相似文献
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入秋以来,沿S104呼武段道路行进时,处处可见山岩险坡好似被一张张带有泥土的蜘蛛网网着,既美观,又牢固,实为沿途景观之一.这是呼和浩特市率先引用新型生物工程技术进行的公路边坡治理,有效地绿化美化了首府后花园绿色通道,确保通往边陲国门要道的安全畅通,可谓是一种成功探索之举.
S104道路呼武段大多为山路,沿途陡坡较多,山体岩石裸露,每遇较大冰雹暴雨、暴风积雪等,很容易出现山石滚落、水土流失等灾害,对过往车辆造成危害,存在严重安全隐患。今年以来,武川县县委、政府责成该县林业局就公路边坡进行重点治理。武川县林业局把S104道路边坡治理确定为2014年城市园林重点项目,全面制订“武川县林业局2014年城市园林项目裸露岩石山体喷播绿化工程”方案,采取公开招投标方式,确定了施工和监理单位。 相似文献
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2种野生岩生植物下土壤微生物生态分布研究 总被引:3,自引:0,他引:3
公路、铁路等道路的建设严重改变原有的景观(张翼等,2000).尤其在我国南方,多山地丘陵,道路建设形成大量裸露的陡峭岩石边坡给绿化工作带来更大困难.岩石边坡未形成成熟土壤,坡度大,水分易流失、蒸发,一般绿化植物不能生长.选择适生于岩石边坡的野生岩生植物,是进一步解决岩石边坡植被恢复这一难题的关键. 相似文献
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通过对皖南山区原有公路裸露边坡自然恢复后的植被进行沿线调查,调查到边坡自然恢复后生长的65种植物,并且对这些植物本身进行了分析,以期为目前建设中高速公路边坡生态防护植物选择提供科学依据。研究结果表明:(1)蝶形花科、菊科、蔷薇科等植物在边坡上具有较强的适应能力,在进行边坡生态防护时可多采用上述3科在皖南自然分布的常见种;(2)在边坡上生长的灌木最多,其次为草本、藤本,最少为乔木,并且都是在后期边坡稳定后出现,说明在边坡生态防护初期应该尽量考虑多使用灌木、草本、藤本,而不要单纯使用乔木种。(3)通过边坡植物多度分析,建议在皖南高速公路建设中边坡生态防护时可以采用盐肤木、马棘、香花崖豆藤、泽兰、铁芒萁、五节芒等植物,同时为了美观可以适当增加野菊花、多花蔷薇等植物,丰富边坡景观效果。 相似文献
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利用复绿(生物防护)工程客土吹附工艺原理,结合东永公路两侧裸露的山体边坡复绿采用生物防护方法及施工工序等措施,复绿(生物防护)工程具有速度快、效果好、成本低等特点。 相似文献
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Soil water is an important factor restricting afforestation on the semi-arid Loess Plateau.The microtopography of the loess slope has changed the distribution pattern of soil water on the slope.To improve water utilization efficiency and optimize afforestation configuration patterns,the relationship between soil water and precipitation at micro-topographic scale must be studied.We used time series analysis to study the temporal variation of soil water and its response to precipitation in four kinds of micro-topographies and undisturbed slope on loess slopes.Micro-topographies significantly influenced soil water distribution and dynamics on the slopes.Soil water stored in the platform,sinkhole,and ephemeral gully influenced subsequent soil water for 4 weeks,whereas soil water stored in the scarp and undisturbed slope could influence soil water for 2 weeks.It took 12 weeks,10 weeks,18 weeks,6 weeks,and 12 weeks for precipitation to reach the deeper soil layer in the platform,sinkhole,scarp,ephemeral gully,and undisturbed slope,respectively.These soil water characteristics in different micro-topographies are vital factors that should be taken into consideration when undertaking afforestation on the Loess Plateau. 相似文献
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为研究在福建北部高纬度区引种邓恩桉对土壤综合肥力的影响,以闽北建阳市引种的邓恩桉为研究对象,比较了由土壤养分各指标进行综合分析所得的土壤综合肥力值,结果表明:邓恩桉人工林土壤综合肥力指标值为0.669,土壤肥力等级为第Ⅱ级,土壤肥力状况良好;杉木人工林和马尾松人工林土壤综合肥力值分别为0.511和0.406,土壤肥力等级均处于第Ⅲ级,土壤肥力状况一般。此外,邓恩桉人工林相对于造林前其土壤综合肥力值显著上升。 相似文献
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In the Loess Plateau, soil desiccation has become a serious problem for forest and grass vegetation. Soil desiccation leads to the formation of a dried soil layer (DSL). This paper presents the results of research carried out in the central part of the Loess Plateau. The objective of the research was to produce a statistically supported set of indicators for evaluating soil desiccation of forestlands, to present a heuristic idea for soil desiccation and to supply scientific support for replacing farmland with forest or grass in the Loess Plateau and other regions of China. Here, we suggest that more attention should be paid to soil desiccation and its effects on the ecosystem of the region in the future. The results showed that natural Quercus liaotungensis forestlands (NQF) retained more water content than regrown Robinnia pseudoscacia forestlands (RRF). Significant DSLs were formed in the RRF but not in the NQF. A possible reason for no formation of DSL in NQF could be due to the presence of an arbor–shrub–herb stand structure and large humus and litter accumulation, which increased the natural forest's (NF) adaptability to the environmental conditions. Soil water content in the north-facing slope was significantly larger than in the south-facing slope. DSLs formed in the 0–500 cm layer of the south-facing slope. When slope gradient was greater than 25°, soil water content deceased sharply and showed significant difference compared with 9°, 15° and 20° (P < 0.05). So, we conclude that plant species, aspect and slope angle could be the predicators for the formation of DSLs. The analysis on soil physical properties of 0–60 cm layer indicated that plant species, aspect and slope angle also have significant effects on bulk density, porosity, plant-available capacity, and hydraulic conductivity, especially in the 0–20 and 20–40 cm layers. In the NQF and RRF with north-facing slope, soil physical properties were improved. 相似文献
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修枝对杉木幼林土壤肥力的影响初报 总被引:2,自引:0,他引:2
在福建洋口林场4年生的杉木人工林建立无节材培育试验地。选择修枝木,每年对其进行1次修枝,修枝强度为4种规定树干直径(6 cm、8 cm1、0 cm和12 cm)以下的所有枝条。试验3 a后研究不同修枝强度对7年生杉木林土壤肥力的影响,结果表明,试验后3 a,所有修枝试验林地的土壤0~10 cm和10~20 cm层次有机质、全N、水解性N和pH值的平均值均高于不修枝的对照,但差异未达到统计显著水平(P>0.05)。不同修枝强度及对照林地大多数土壤性质之间的差异未达到显著水平(P>0.05)。修枝后土壤性质有所改善,这可能与修枝后林下植被得到恢复有一定关系。修枝对杉木林地土壤性质的长期影响有待于今后进一步观测。 相似文献