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通过调查太原市主要道路、公园、学校、厂矿及居住区等地被植物，对其种类组成和应用现状进行了研究分析，指出了太原地区地被植物开发利用中存在的问题以及解决地途径。 相似文献
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采用样地调查法,对兰溪市区内的公园、道路、山林、水体等绿地植物种类及城市绿地半自然环境下自然生长的地被景观进行实地调查。结果显示:兰溪市城市绿地中有植物64科150种,裸子植物4科12种,藤本植物4种(不包含非人工种植的野生地被植物种类)。建成区主要公园绿地植被群落较为人工化,主要树种较为单一,可以划分为12个群落类型;建成区主要的26条道路应用的绿化树种仅有8种;城市绿地中地被植物群落类型30种。存在城市绿地中植物种类丰富度不够,植物景观特色单一,乡土植物应用薄弱等问题。 相似文献
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在对园林地被植物进行界定的基础上,将千岛湖园林地被植物分为草本地被、观叶地被、观花地被和观果地被4类,并分别阐述了现有的种类、应用原则及应用形式,最后提出了园林地被植物在千岛湖景观建设中的应用建议。 相似文献
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北京百花山野生草本地被在城市园林中的应用 总被引：1，自引：0，他引：1
分析北京城区草本地被植物应用中存在的问题,对百花山海拔1 100~2 100 m的野生草本地被植物资源种类及分布进行现地调查统计结果,具有较高观赏价值的野生草本地被植物有几十种,分别林下地被、岩石园地被、水边地被、路边墙角等花境布置植物、混播草坪植被等不同类别进行城市园林地被应用分析.提出百花山野生草本地被资源合理开发利用的建议. 相似文献
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本文立足于颐和园的具体情况和特色,对园内人工及野生地被植物种类、数量、分布、应用效果等进行实地调查,总结了颐和园地被应用的经验和地被发展中应注意的问题,旨在使大家对颐和园地被植物的发展历史和应用现状有所了解,并为地被植物应用研究提供参考。 相似文献
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对地被植物的概念、特点、研究现状,进行了分析研究。在分析丽水市的地被植物应用现状,可开发利用的野生地被植物资源的基础上,对目前丽水市区地被植物应用中存在的问题,具体的解决途径以及开发潜力进行分析,并推荐一些适于丽水市区应用的地被植物种类。 相似文献
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The aim of this study is to investigate the effects of forest conversion on forest floor vegetation. ‘Ecological’ forest conversion,
as defined by an interdisciplinary southern Black Forest project group, describes the transformation of even-aged spruce (Picea abies L. H. Karst.) stands to structured continuous cover forests consisting of spruce (Picea abies), silver fir (Abies alba Mill.) and beech (Fagus sylvatica L.). In order to analyse the conversion process, four conversion stages were defined in a conceptual forest development model.
Four forest districts deemed to be representative of the southern Black Forest region were selected for the study. The ground
vegetation was initially classified independently from the stand structures. Subsequently, the relationship between stand
structures, as determined by development stage, and ground vegetation was analysed. It was revealed that forest conversion
modified the ground vegetation. The main factors influencing ground vegetation were the influence of broadleaves, predominately
beech (F. sylvatica), on the canopy composition and litter coverage on the one hand; and the canopy coverage of spruce, the proportion of needle
litter and the associated light penetration on the other. The prevalence of moss and vascular plant species preferring acidic
sites found in spruce forests decreased during the transition process, whereas, species requiring a moderate base supply increased
in abundance. The continuous cover forest representing the final stage of conversion increasingly contained a mixture of ground
vegetation species normally associated exclusively with either conifer or deciduous forest. Due to the fact that there is
an associated ground vegetation specific to the different stages of forest conversion in stands dominated by Norway spruce
or European beech and a mixture in the latest conversion stages, large-scale forest conversion should be avoided in favour
of management promoting a diversity of silvicultural goals and treatments in neighbouring stands. Only a variety of treatments
ensures the maintenance of floristic diversity in the long-term. 相似文献
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Franklin Jennifer A. Zipper Carl E. Burger James A. Skousen Jeffrey G. Jacobs Douglass F. 《New Forests》2012,43(5-6):905-924
Competitive effects of dense herbaceous vegetation (ground cover) can inhibit forest restoration on mine sites. Here we review the evidence of ground cover interactions with planted tree seedlings on coal surface mines of the eastern US, discuss recent research into these interactions, and draw conclusions concerning ground cover management when restoring forests on reclaimed coal mines. Reclaimed mine sites have a high potential to support productive forests, however forest establishment is inhibited by reclamation practices that included soil compaction, and the seeding of competitive ground covers. In the first few years after tree planting, a dense ground cover of grass and legume species commonly seeded on mine sites often affect growth and survival negatively. Herbaceous vegetation providing less extensive and competitive ground coverage may either facilitate or inhibit tree establishment, depending on site conditions. The use of quality planting stock promotes the competitive ability of seedlings by improving nutrient status and the ability to capture available resources. Herbaceous species have contrasting functional characteristics, and thus compete differently with trees for available resources. Negative interactions with trees are more frequently reported for non-native cool-season grasses than for native warm-season grasses, while the effects of legumes change over time. Further research is needed to fully understand the mechanisms of tree/ground cover interactions. The development of seeding mixes that can control erosion, facilitate survival and growth of planted trees, and allow establishment by unplanted native species would aid forest restoration on eastern US, coal mines.
相似文献15.
采用样方法对北京植物园中乡土草本地被植物的种类、频度和生长势进行调查。结果表明,北京植物园内的乡土草本地被植物共53种,隶属25科51属,其中菊科、十字花科和唇形科植物种类最多,茜草科、马齿苋科、罗藦科等15个科仅1种植物;抱茎苦买菜的出现频度最高。结合调查与城市园林应用进行分析,提出适合做林下、岩生及水边地被植物的种类,并提出加强乡土植物生境的调查研究,针对植物引种提出先易后难、少量间断移植,引种繁殖方式视所引种植物的生殖特性和引种量而定。 相似文献
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文章以婺州公园为例,结合参与改造提档工程施工管理经验,对该园地被植物的应用历史、现有种类、具体应用方式进行了总结;分析了地被植物生长状况与原因,并据此筛选出适宜金华地区的新优地被植物种类。
相似文献
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Diversity of naturally-regenerated native woody species in forest plantations in the Ethiopian highlands 总被引：1，自引：0，他引：1
Woody species diversity and ground layervegetation cover were studied in plantations ofPinus patula, Cupressus lusitanica,Grevillea robusta, and Juniperusprocera, and in surrounding natural forests inWondo Genet, Ethiopia. In the understory of theplantations, a total of 53 naturallyregenerated tree and shrub species belonging to31 families were recorded. Important indigenoustimber species were also represented. Treesaccounted for 72% of all naturally-regeneratedwoody plant species. On the average, 78% ofthe woody species found in plantations werealso found in the natural forest. There was nosignificant variation in understory woodyspecies richness among plantations. C.lusitanica plantations had a significantlyhigher abundance of woody species than those ofP. patula, but the difference wasnot significant in relation to J. procera,G. robusta and the adjacent natural forest.The herbaceous ground cover percentage in G. robusta and P. patula stands wasconsiderably higher than in C. lusitanicaand J. procera stands. Relative toplantations of other species, plantations ofthe native tree species J. procera hadhigher understory species richness, mediumwoody species abundance and low ground cover.Although there was a marked variation inoverstory plantation density, its effect onunderstory species richness and abundance wasnot significant. The density ofnaturally-regenerated woody species inplantations was over three times the usualplanting density in Ethiopia, indicating a highpotential of forest plantations for restoringthe natural forest ecosystems on degraded landsat a comparatively low cost. 相似文献
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Kamal J.K. Gandhi Daniel W. Gilmore Steven A. Katovich William J. Mattson John C. Zasada Steven J. Seybold 《Forest Ecology and Management》2008
We studied the short-term effects of a catastrophic windstorm and subsequent salvage-logging and prescribed-burning fuel-reduction treatments on ground beetle (Coleoptera: Carabidae) assemblages in a sub-boreal forest in northeastern Minnesota, USA. During 2000–2003, 29,873 ground beetles represented by 71 species were caught in unbaited and baited pitfall traps in aspen/birch/conifer (ABC) and jack pine (JP) cover types. At the family level, both land-area treatment and cover type had significant effects on ground beetle trap catches, but there were no effects of pinenes and ethanol as baits. Six times more beetles were trapped in the burned forests than in the other land-area treatments; more beetles were caught in undisturbed than in wind-disturbed sites, and one-third more beetles were caught in the ABC than in the JP cover type. Thus, the windstorm generally reduced the activity-abundance of the beetles, but prescribed-burning increased it. Both salvaged and burned forest plots (especially in the ABC cover type) had the greatest species richness, diversity, and the most unique species assemblages. There was a highly similar ground beetle species composition (nearly 100%) between the ABC and JP burned forests, indicating that burning was a more primary driver of composition than cover type. At the species level, Pterostichus melanarius, an invasive ground beetle from Europe and a cover type generalist, was the most abundant beetle in the study (one-third of the total catch), and was caught in greatest numbers in burned forests. Removal of P. melanarius from the species composition analyses altered similarities among cover types and land-area treatments. Sphaeroderus nitidicollis brevoorti and Myas cyanescens were caught exclusively in the ABC and JP cover type, respectively; two rare pyrophilous species, Sericoda obsoleta and Sericoda quadripunctata, were only caught in burned sites; three forest species, Pterostichus coracinus, P. pensylvanicus, and Sphaeroderus lecontei, were caught more often in undisturbed JP sites; and two frequently trapped, open-habitat species, Agonum cupripenne and Poecilus l. lucublandus, were nearly absent from the undisturbed and wind-disturbed sites, as salvage-logging had a significant positive effect on their activity-abundance. Most species of Amara and Harpalus were trapped only in the salvaged or burned sites, indicating invasion of these disturbed sites by open-habitat species. We conclude that both the combined effect of fuel-reduction activities subsequent to the wind event and the numerical response of the invasive P. melanarius to habitat disturbances can alter the short-term succession of ground beetle assemblages in the sub-boreal forest. 相似文献
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Tonje Økland Jørn-Frode Nordbakken Holger Lange Ingvald Røsberg Nicholas Clarke 《Scandinavian Journal of Forest Research》2016,31(8):766-776
Effects of clear-cut harvesting on ground vegetation plant species diversity and their cover are investigated at two Norway spruce sites in southern Norway, differing in climate and topography. Experimental plots at these two sites were either harvested conventionally (stem-only harvesting) or whole trees including crowns, twigs and branches were removed (whole-tree harvesting), leaving residue piles on the ground for some months. We compare the number of plant species in different groups and their cover sums before and after harvesting, and between the different treatments, using non-parametric statistical tests. An overall loss of ground vegetation biodiversity is induced by harvesting and there is a shift in cover of dominant species, with negative effects for bryophytes and dwarf shrubs and an increase of graminoid cover. Differences between the two harvesting methods at both sites were mainly due to the residue piles assembled during whole-tree harvesting and the physical damage made during the harvesting of residues in these piles. The presence of the residue piles had a clear negative impact on both species numbers and cover. Pile residue harvesting on unfrozen and snow-free soil caused more damage to the forest floor in the steep terrain at the western site compared to the eastern site. 相似文献