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| Effect of plant on controlling soil erosion in the process of expressway construction |
| Cheng Yun1,Chen Zongwei2,Zhang Hongjiang1 |
| 1.Beijing Forestry University,100083;2.China Academy of Transportation Sciences,MOC,P.R.China,100029: Beijing,China |
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Abstract Taking constructing Hurongxi Expressway of Hubei Province as an example,the effect of different mixture sowing style,different plant species and different plant cover degree on soil erosion had been studied.Study show:Vegetation plays an important role in reducing soil erosion quantity of dumping ground in the process of expressway construction.In research expressway different kinds of mix-seeding vegetation showed a(remarkable)impact on soil erosion: Pattern of mix-seeding vegetation of grass,frutex and arbor had a best effect on reducing soil erosion and pattern of mix-seeding of grass and frutex took second place and pattern of mix-seeding of grass took the last.Besides different pattern of vegetable mix-seeding,plant species had a strong impact on soil erosion.Furthermore,the mix-seeding pattern of grass and frutex Testuca arundinacea+Festuca rubra+Cajanus fulvus DC.+Tephrosia candida(Roxb.) DC.+Crotalaria pallida Ait.had a best effect on reducing soil erosion.In the mix-seeding pattern of grass,frutex and arbor Testuca arundinacea+Festuca rubra+Indigofera pseudotinctoria Mats.+Alnus+Robinia pseudoacacia L.had a strong adaptability to research expressway and a better effect on reducing soil erosion.The research production not only contributes to Hurongxi expressway construction but also to the highway construction of other sites with similar(environmental)condition so as to raises level of expressway ecological construction and accelerate sustainable(development)of west region.
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Received: 16 August 2006
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