Study On The Greening Of Hebei Section Of Jing Kun Expressway Service Area

For the current situation of expressway in Hebei province, selecting the Hebei service area of Jing-kun expressway to investigate and summarize its green models、plant application and conservation.Directed the existing question, to plan tree species, propose maintenance technology and provide evidence for Hebei and even the whole country expressway greening.The green plant species of most service areas in Hebei expressways are abundant, and shrub species exceed 10, part service areas reach 20~30 kinds, forming a different landscape or have a lot of flowers, fruit, foliage effect.Clear plant variety a total of 140 species in the Hebei service area of Beijing-Kunming Expressway, including trees 68 species, 21 species of shrubs, vines 2 species, perennial flowers 12 species, crop and vegetables 14 species, aquatic plants 2 species, annual flowers 13 species.Belonging to 49 families, of which 10 species of coniferous trees, 93 species of Broadleaf, 1 species of bamboo; 46 species of Herb.Main scope of tree size and the status of Baoding and Shijiazhuang :the diameter at breast height of mostly Pinus tabulaeformis is 8~12cm,which is more uniform and excellent. the diameter at breast height of mostly Pinus sylvestris is 8~12cm, which is more uniform and excellent. growth is good.the diameter at breast height of mostly Platanus orientali in the whole expressway is 14~22cm, of which Baoding section is 18~22 cm, Shijiazhuang section is 14~18 cm.Addition to the Zhuozhou service area,other areas is well. the different diameter distribution number of Ginkgo biloba has 2 peaks, 8~10cm and 14~16cm.the tree diameter at breast height of Sophora japonica is 12~24cm,of which Baoding is 16~22 cm, Shijiazhuang is 12~14 cm.the diameter at breast height of Fraxinus pennsylvanic used in Baoding is 12~20 cm,which grow well. the diameter at breast height of Ailanthus altissima is 8~14 cm,which grow well. the diameter at breast height of Albizzia julibrissin is 10~16 cm,which grow well. Populus tomentosa only used in Baoding grow well.107 Populus only used in Shijiazhuang,whose diameter at breast is small.triploid Populus tomentosa in Baoding, Shijiazhuang sections, grow well,whose dbh distributions is dispersal.The whole section of main Arbor species dbh distribution is a normal distribution, the vast majority concentrated in the 6~22cm. Due to the short length of planting,many trees is in a strong growth phase.Clearing plant application frequency and health status, application frequency over 50% has 28 species.Buxus megistophylla、Pinus tabulaeformis、Platanus Orientalis、Albizia julibrissin、Sabina chinensis、Rosa chinese、Ailanthus altissima、Ebenaceae、Cedrus deodara、 Ginkgo biloba、Sophora japonica、Forsythia suspensa、Magnolia denudata、Pinus sylvesris、Ulmus、Malus micromalu、Prunus、Armeniaca vulgaris、Prunus lannesiana、Trifolium repens、Vitis vinifera、Lagerstroemia indica、Fraxinus pennsylvanica 、Corn、Hemerocallis hybrida、Iris tectorum、Ligustrumx Vicaryi、Allium fistulosum.application frequency below to 20% accounted for 54.28%.Study on greening pattern of this service area and propose 3 models, namely, the square-greening, Jingxing is as the representative in this pattern which used the area have more cars and people;Garden-greening, Zhuozhou, dingxing,Shunping, quyang, xingtang, Shijiazhuang service areas represent this pattern where landscaping fully embody the Leisure Garden properties;Agricultural and ecological park which is suitable for Lingshou and Manchen.Tangxian is the representative.Evaluating tree species, rank class I 27 species;Class II 20 species;class III 34 species;class IV 14 species.Planning Trees in order to provide basis for other areas. Raises the mode reform plan of plant species, set the tone, key tree species, general species,main species, annuals or perennials, vegetable and crop species.Survey the situation of pestsand puts forward specific programmes, serious harm pests 16 species and diseases 1, noxious weed 11 species.Established the landscaping maintenance calendar for service areas throughout a year.