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通过对色彩学与现代公路绿地景观之间关系的研究,对现代公路绿地景观设计中色彩学的应用进行了初步探讨,提出从色彩学的角度设计公路绿地景观,改善公路景观,赋予公路更多的色彩,拓展公路景观的视觉范围,创造宜人的公路景观环境。论述了合理搭配绿地景观色彩的方法,将色彩理论有效地融入公路景观设计实践中,有利于协调城市景观环境色彩。此次研究总结公路绿地景观的构成要素与特点,力求提高我国现代公路绿地景观的视觉环境质量,提出了相应的色彩应用对策,为美化我国公路景观提供了有益的建议。 相似文献
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阐述南方公路的绿化景观设计要点、公路绿化景观植物图案的设计方式,并以浙江义乌公路为例探讨绿化景观设计的个性与特色。 相似文献
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伴随经济的发展,公路使用者的生活需求不断发生变化,不再只满足于公路数量的增加,更期待公路景观环境质量与数量的增长成正比。我国公路景观设计开始更多的关注大自然和生态环境,注重与自然环境的和谐,努力打造富有地域特色、品质更佳的公路景观艺术作品。柳州路景观设计是这一理念的现实应用和展现。 相似文献
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对于有自身特色的校园,景观设计应该将校园文化与造园手法结合。探讨山东公路技师学院新校区景观设计,从场地背景到设计特色、景观序列到设计方法,特别是注重场地条件与中国道路文化相结合,并详细介绍特色景观的创作和意义。 相似文献
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随着公路建设者理念的更新,人们对公路要求已不仅仅局限于其安全性、便利性和耐久性,"生态道路"、"景观公路"也越来越受到关注。文章分析机场高速(西宁段)沿线景观设计,并对如何将机场高速沿线打造成具有"交通干线、景观主线、生态绿线"3大功能的现代化景观高速公路进行探讨,以探求合理的高速公路设计方法。 相似文献
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植物景观是园林景观的重要组成部分,与其它景观设计要素是紧密相关的。在做植物景观设计时不可孤立地来考虑单纯植物的知识和技术,还要认真考虑其它专业并与其进行沟通,这样才能更好地做好植物设计,从而达到更好的景观效果。本文通过福州高尔夫会所景观项目的植物设计,探讨植物景观设计是怎样结合其它景观要素而设计的。 相似文献
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随着我国高速公路不断发展,山区公路隧道洞口景观设计问题也受到了越来越多的关注。有关研究表明隧道洞口的景观效果和隧道洞门的安全作用并不矛盾,两者相结合可以实现洞门结构稳与美的统一。本文通过分析我国公路隧道的现状以及洞口景观的重要作用,对隧道洞口的景观设计进行探讨,希望给予广大同行们以借鉴和参考。 相似文献
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U. Saini D. Kaur S. Kumar R. D. Singh P. S. Ahuja 《The Journal of Horticultural Science and Biotechnology》2013,88(6):605-612
SummaryGenetic improvement of tea through breeding is difficult. Therefore, transgenic tea plants expressing the osmotin gene from Nicotiana tabacum were produced using parameters optimised for biolistic-gun mediated transformation. During optimisation, a total of 4,500 somatic embryos were bombarded using nine combinations of variable target distances and burst pressures, while keeping the gap distance (0.6 cm) and macrocarrier flight distance (16 mm) constant.A total of 90 independent, PCR-positive lines were generated. Southern hybridisation confirmed integration of the osmotin gene in 26 out of 27 PCR-positive lines (three independent lines from each of the nine parameter combinations were selected at random). Statistical analysis revealed that the efficiency of transgene integration was significantly affected by target distance. Only those lines derived from somatic embryos bombarded with 1.0 µg plasmid DNA using a 7.58 MPa burst pressure and 9-cm target distance showed osmotin expression. This was evident from strong northern hybridisation and RT-PCR signals. Leaves of 4-year-old transgenic plants growing in a contained polythene tunnel showed improved osmotic adjustment in response to osmotic stress imposed by NaCl. The osmotic potentials of transgenic leaves immersed in 100 mM or 200 mM NaCl solutions were more negative than those of non-transformed control leaves. 相似文献
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针对食用菌物流运输能力进行评价,采用了层次分析法,选择物流运输时间、运输距离、运输工具、业务点数量和业务点分布5个评价指标构建了评价模型,得出了食用菌物流运输能力的评价值,科学全面地评价了食用菌物流运输能力。 相似文献
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With the popularization of green roofing systems, their wind resistant performance is becoming more and more important especially in typhoon areas. A prerequisite study was carried out to determine the aerodynamic characteristics of suitable trees to provide basic scientific data. Shrubby specimens of three tree species appropriate for intensive green roofs with different aerodynamic forms were tested through a boundary layer wind tunnel experiment, including one deciduous tree, one coniferous tree and one broadleaf evergreen tree. Drags and overturning moments under different wind speeds were measured; wind-speed-specific frontal areas and tip displacements were recorded. After initial tests, trees were pruned to investigate the effect of crown porosity, and the effects of view angle and turbulence intensity were also considered. The results showed that even considering frontal area reduction due to increasing wind speeds, drag coefficients decreased with increase in wind speed for deciduous and coniferous trees. Drag coefficient characteristics for different trees agreed well with those obtained from previous researches. The effect of crown porosity varied among tree species, but view angle and turbulence intensity did not significantly affect it. 相似文献
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Metapopulation genetic structure and migration pathways in the land snail Helix aspersa: influence of landscape heterogeneity 总被引：4，自引：0，他引：4
The spatial genetic structuring of the land snail Helix aspersa was investigated for 32 colonies within an intensive agricultural area, the polders of the Bay of Mont-Saint-Michel (France). Given the habitat patchiness and environmental instability, the setting of H. aspersa colonies meets the broader view of a metapopulation structure. The identification of extrinsic barriers to migration and their impact on the genetic distribution was addressed through the genotyping of 580 individuals using a combined set of enzyme and microsatellite loci. To evaluate the distance as well as the direction over which the spatial genetic arrangement occurs, two-dimensional spatial autocorrelation analyses, Mantel tests of association and multivariate Mantel correlograms were used. Different connectivity networks and geographical distances based on landscape features were constructed to evaluate the effect of environmental heterogeneity and to test the adequacy of an isolation by distance model on the distribution of the genetic variability. Genetic divergence was assessed using either classical IAM-based statistics, or SMM-based genetic distances specifically designed to accommodate the mutational processes thought to fit microsatellite evolution (IAM: Infinite Allele Model; SMM: Stepwise Mutation Model). Genetic distances based only on genetic drift yielded the most plausible biologically meaningful interpretation of the observed spatial structure. Applying a landscape-based geographical distance which postulates that migration arises along roadside verges, hedges or irrigation canal embankments gave a better fit to an isolation by distance model than did a simple Euclidean distance. The progressive decline of genetic similarity with physical distance appeared to be environmentally induced, leading to functional migration pathways.This revised version was published online in May 2005 with corrections to the Cover Date. 相似文献
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Ashok Kumar R.K. Avasthe K. Rameash Brijesh Pandey Tasvina R. Borah Rinchen Denzongpa H. Rahman 《Scientia Horticulturae》2011
Field experiments were conducted during 2005–09 at ICAR Sikkim Centre, Tadong, East Sikkim, India at an altitude of 1400 m amsl to identify the suitable environment for high production of good quality fruits with less diseases for strawberry varieties Ofra and Chandler. Both the varieties were grown under low cost polyhouse, plastic tunnel and open conditions. Maximum number of flower trusses per plant was recorded in Chandler under open condition (13.0) followed by plastic tunnel (12.7). The maximum number of fruits per inflorescence was found in Ofra (7.12) under polyhouse while maximum number of runners per plant was observed in Ofra (12.3) in open conditions. Plastic tunnel with Ofra produced highest fruit weight (26.2 g), fruit length (5.5 cm) and fruit diameter (3.9 cm). Best fruit quality in terms of TSS (6.8%), lower acidity (0.83%) and total sugar (6.3%) was observed in Chandler under plastic tunnel conditions. The highest total fruit yield was recorded with Ofra under plastic tunnel (40.2 t/ha) but the maximum marketable yield was obtained in Chandler under plastic tunnel (35.3 t/ha). Diseases were found to be less prevalent in tunnel as compared to polyhouse and open conditions. 相似文献
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泊头市重金属元素空间变异规律研究 总被引：1，自引：0，他引：1
采用GIS与地统计相结合的方法对泊头市表层土壤(0～20 cm)全量Zn、Cu、Pb、Hg、Cr、Cd、Ni、As 8种重金属的空间变异特征进行了分析。结果表明:从相关系数来看,8种重金属中除Hg以外,其它重金属在研究区内都呈现显著的正相关关系,土壤数据中除了全AS属于正态分布,其余元素数据经对数转换后符合正态分布,通过元素的块金效应分析,元素Ni和Cr在研究区的空间相关性最为强烈;用Kriging内插法对8种重金属进行最优估计,从空间插值图可以直观地看出,某些地区重金属含量由于受到人类活动的影响表现出局部的异常性,中东部大于西南部,主要集中在洼里王镇和王武庄乡、郝村乡,其它乡镇相对含量较低,这一方面受河流影响,重金属在水中难存留,另一方面就是东部工业发达,因此受到的重金属污染可能较大。 相似文献
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长豇豆早春保护地栽培模式的比较试验 总被引：2，自引：0，他引：2
以鄂豇豆 2号、特早 3 0、之豇 2 8 2豇豆品种作为试验材料 ,采用“大棚套小拱棚营养钵育苗 +移栽露地地膜覆盖 +套小拱棚栽培”、“大棚套小拱棚营养钵育苗 +移栽大棚栽培”和“露地直播 +地膜覆盖栽培”3种武汉地区长豇豆早春保护地栽培的常用栽培模式 ,组合成 9种不同的处理进行双因子试验。结果表明 :长豇豆早春保护地栽培的优良品种是鄂豇豆 2号 ,优良栽培模式是栽培模式 1(大棚套小拱棚营养钵育苗 +移栽露地地膜覆盖 +套小拱棚栽培 ) ,优良组合栽培模式是处理组合 1C(大棚套小拱棚营养钵育苗 +移栽露地地膜覆盖 +套小拱棚栽培和鄂豇豆 2号豇豆品种组合栽培模式 )和 2C(大棚套小拱棚营养钵育苗 +移栽大棚栽培和鄂豇豆 2号豇豆品种组合栽培模式 )。 相似文献
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转光膜的温光效应及其对春大白菜生长发育的影响 总被引：2，自引：0，他引：2
对两种转光膜的温光效应及其对春大白菜生长、产量及品质的影响进行了研究。结果表明,转光膜Ⅱ的透光率较高,增温效果较好。同时具有调节棚内温度的作用,当气温较低时,棚内气温及5 cm地温较普通薄膜分别提高0．5～0．9℃和0．7～1．3℃；当气温较高时,棚内气温及5 cm地温则比普通薄膜分别下降0．2～1．0℃和0．2～0．6℃。转光膜处理的春大白菜生长势显著增强,产量提高,品质改善。收获时,转光膜Ⅰ、Ⅱ处理的春大白菜产量分别比对照增加7．53%和13．70%。 相似文献