Title: Comparison of Soil Antiscouribility Enhanced by Eight Shrub Roots at the Section from Nehe to Nenjiang of G111 Highway
Abstract: The section from Nehe to Nenjiang of G111 highway is one of the most windy desert areas in this region.It is very easy to form the soil erosion regions after the road construction in this area.Therefore,it is very important to choose the species which have the root system of solidifying soil and decreasing water loss for the vegetation recovery at road side.The root characteristics of eight shrubs were examined by digging the whole root system out.The soil antiscouribilities of different shrub root systems were identified using the undisturbed soil trough scouring method.Then,the size and amount of different shrub roots and the physiochemical characters of the soil were analyzed with the principal components analysis.The result showed that:(1)The root distribution in soil for eight shrub species had great difference;(2)The soil antiscourability for the same species increased with the increase of the soil depth,decreased with the increase of the slope and decreased with the increase of the precipitation;(3) The biomass of the roots whose length are less than 1 mm,the length of the whole root,and the contents of organic matter and available potassium were very important to determine the soil antiscourability by the principal components analysis,which had stronger effects under the heavy rain washing.The common factor variances for above root and soil factors in the principal component analysis were 0.99,0.98,0.98,and 0.97 respectively;(4) The order of the soil antiscourability for eight shrubs is Syringa oblata,Forsythia mandshurica,Cornus alba,Ligustrum obtusifolium subsp.suave,Weigela florida,Platycladus orientalis,Prunus tomentosa and Caragana arborescens.We recommended the first four species as the plants of vegetation recovery in this area.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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