Research Design About Construction Pattern In Shelter-forest Of Coastal Areas In Hebei Province

The coast of Bohai Bay, muddy with soil permeability poor , heavy clay texture , nutrient poor , severe salinization , and shallow saline groundwater is not conducive to vegetation survival. Cangzhou, Tangshan City, the coastal shelterbelts on the basis of the analysis of the status of its system , a new species configuration and coastal shelterbelt architecture optimization , in order to guide the Hebei Province, the coastal shelterbelts project construction .Changzhou City, coastal areas of saline-alkali soil under different habitats in the investigation , the results show that: In the arbor species, Populus×euramiricana cv.is appropriate to do fast growing forest,Farmland shelterbelts and turn the four sides green,because of the high survival rate, Fast growth and Growing well. Fraxinus velutina Torr is well to salt-tolerance, Suitab for growth in mildly saline land,and To be all around green trees. Salix matsudana is one of the fast-growing species,Water wet , suitab to grow in a mild saline land. Planting in waterlogged alkali hand in hand on both sides of the canals and salinization depression.It Should be as firewood forest, is also good species of farmland shelterbelts. Robinia pseudoacacia L. roots can fix nitrogen, saline land afforestation pioneer tree species, it can be as street trees. Zizyphus jujuba var. inermis strict requirements on the soil , with the exception of the swamp and heavy alkaline soil (ph > 9) can be cultivated, groundwater level is also no strict requirements and can be use as a good economic crop. Amorpha fruticosa as a shrub species, rapid growth, adaptability, and can be used as the bottom of the saline-alkali soil forest trees, not only has the economic development prospects also have ornamental value .Survey of coastal areas, salinity of improved technology in Tangshan, there are four main technical mode:“One band and one ditch”cantilever platform engineering technology model planting mode to reduce the amount of the new soil , saving the cost of the project , the mode of its efforts to promote. The shallow subsurface pipe engineering technology model for salt removal, high costs , maintenance costs , but the effect of salt drainage , only in some local areas , such as Street Trees can be taken , Application limitations; The artificial soil technology is the twenty-first century promising way to resolve land reclamation , soil improvement and afforestation problems and alleviate some of the coastal cities due to the pressure of the construction land use restrictions . The roadside greening configuration mode is the most common mode, which according to site conditions and protection needs , the choice of different traits of the species of mixed tree, shrub , grass , to ensure the the shelterbelt continued , consistent role .Through the research of Hebei Province about the coastal shelterbelts body of the species and technology, Designed 15 kinds of configuration diagram on the coastal shelterbelt, Include the tree species arrangement in Canals, farmland shelter forest and trunk roads under different salinization. Provides important parameters for the shelter belt construction.