Preliminary Study On Green Defense Forest System Building Techniques And Greening Patterns Of Expressway

Through detailed investigations,field experiment and demonstration, comprehensively using the knowledge of Forestry Engineering, Horticultural, Landscape garden, Environmentology, System Engineering, etc,combining with the actual condition,the purpose of establishment of green protection system and the strategy that could enhance the green protection system along expressway were discussed. First,according to the physioclimate and agrotype of Henan province, the ecological of haiway in Henan province could be divided into 10 types,such as Taihang Mountain region, Loess ravine region, the south slope of Funiu Mountain, the north slope of Funiu Mountain, Tongbai hilly region, Dabie hilly region, Plain of Huanghua Area, Plain of Huanghai Area, Nanyang Basin, Huanghe flooding, based on which this paper intensively studied the green protection system and selected the best plant arrangement mode of the expressway.This research provided the key constructing technology of green protection system and countermeasures:①rationally planning,scientifically approved,②assuring the constancy of variety of functions and multiples benefits of the green protection system; came up with the conception of making up the green protection:①sorting out thoughts,setting up the correct idea,②combining with the actual condition,constructing the characteristic of highway in Henan province,③designing scientific planning scheme, giving the theoretical support of the green protection system of Henan province;put forward the optimizing greening design and plants arrangement:①scientifically collocating, and paid attention to the safe principle,②planting according to the environment and biological diversity principle,③Overall planning, and coordination of the principles of landscape,④Afforestation and beautification, and combined principle with effectiveness,⑤User-friendly and economic principle; selected the best 8 plant arrangement modes of the expressway,such as: Juniperus formosana Hayata·Prunus ceraifera cv. Pissardii+ Amorpha fruticosa L.+ Ligustrum lucidum+ Phragmites australis+ Cedrus deodara (Roxb.) G. Don·Salix alba var.Tristis·Populus canadensis Moench·Medicago sativa,Buxus sinica (Rehd. et Wils.) Cheng·Nerium indicum Mill+ Ligustrum quihoui Carr+ Juniperus formosana Hayata+Typhaangustifolia+ Ligustrum lucidum·CatalpabungeiC.A.Mey·Paulownia·Ophiopogon japonicus(Thunb.)Ker-Gawl,Nerium indicum Mill·Rohdea japonica (Thunb.) Roth.+ Parthenocissus tricuspidata (S. Et Z. ) Planch.+ S.chinensis (L.)Ant. (Juniperus chinensis L.)+ Tamarix chinensis Lour.+ Platycladus orientalis (Linn.)Franco·Robinia pseudoacacia L.·Juglans regia·Ephedra sinica Stapf·S.chinensis (L.)Ant. (Juniperus chinensis L.)·Lagerstroemia indica+ Vitex negundo L.+ Sabina komarovii(Florin)Cheng et W.T.Wang+ Typhaangustifolia+ Platycladus orientalis (Linn.)Franco·Pistacia chinensis·Acer negundo Linn.·Salvia miltiorrhiza Bge.etc. Based on the investigation and tests, this paper provided the rationalization proposals of the afforestation of Henan Highway and previewed the application prospect of the research findings.