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| Vegetation rehabilitating techniques and its effects in 207 national highway section of Inner Mongolia |
| Luo Junbao1,2,Sun Baoping1 |
| 1.Beijing Forestry University,100083,Beijing;2.Inner Mongolia Communications Design & Research Cooperation Limited,010010,huhhot: China |
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Abstract This paper initially analyzed the mechanism of engineering methods before the vegetation rehabilitation work on the shiftting sand dune in 207 national highway section of Inner Mongolia,and it pointed out that engineering methods such as sand barrier make the underlying surface rougher,which is the principal factor(affecting)the settlement of plnat seeds by breaking wind.The experiment shows that after setting the alive Salix gordejevii sand barrier,the roughness of surface increase four hundreds sixty-five to six hundreds forty-three times than original one,greatly weakening the kinetics intensity of wind near surface.As a result,a better living environment has been created for local vegetation,and the survival ratios of Caragana korshinskii,Hedysarum mongolicum,Ulmus Pumila,Hippophae rhamnoides growing within the alive Salix gordejevii sand barrier are twelve percent,nine percent,two percent and five percent respectively more than the comparative samples.Meanwhile,the alive Salix gordejevii sand barrier has also supplied chances for invasion of other plants,and the number of vegetation species within the barrier have increased eleven more than other places.The coverages in it have increased fifty percent to sixty percent,and the biomasses have also increased twenty to twenty-six times than CK.
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Received: 20 February 2006
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