中文摘要：

国道G111讷嫩段是较严重的风沙区,选取9种东北常见绿化灌木,对其根系土壤抗蚀性进行研究。首先以全根挖掘法考察其根系形态分布特征,以静水崩解法确定不同灌木根系土粒抗蚀指数大小变化,最后用主成分分析法对衡量土壤抗蚀性的25项指标进行分析。结果表明：9种灌木土壤抗蚀性的增强效应不同,但都随着土层深度增加,抗蚀指数呈下降趋势,并且9种灌木土壤抗蚀指数（S）都随浸水时间（t）呈三次函数曲线变化（R2≥0.82）。微团聚体、有机质、速效钾、〉5 mm和0.5~2 mm土壤大团聚体及〈1mm根系生物量、根系长度,在植物对土壤抗蚀性增强效应中起主要作用,它们的公因子方差都超过了0.90。9种灌木根系对土壤抗蚀性增强效应依次为：紫丁香〉树锦鸡儿〉爬地柏〉红瑞木〉东北连翘〉辽东水蜡〉紫穗槐〉毛樱桃〉红王子锦带,建议对前5种灌木进行推广应用。

英文摘要：

The segment from Nehe to Nenjiang of the national highway G111 is one of most serious sandstorm areas.Observed the root morphological distributions of nine northeastern common green shrubs by the whole root mining method first,determined the erosion-index of the nine shrub roots by hydrostatic collapse method according to the soil particles,and finally using principal components analysis analyzed the total 25 factors which related to soil anti-erodibility.The results indicated that： Different tree species with distinct enhancement effect on soil anti-erodibility,as with the soil depth increase,the corrosion index goes downward.Besides,the relationship between the soil erosion index（S） and the immersion time（t） was a three times function curve in each different species（R2≥0.82）.Micro-aggregates,organic matter,available K,5 mm,0.5~2 mm large soil aggregates,1 mm root biomass and root length were all riding key roles on the soil anti-erodibility enhancement effect,and their common factor variances were all more than 0.90.The order of the enhancement effect for the 9 species was： Syringa oblataCaragana arborescensClimbing cypressCornus albaNortheast forsythiaLigustrum obtusifolium subsp.suaveAmorpha fruticosaPrunus tomentosaWeigela florida ＇Red Prince＇.We recommend that the first 5 species could be widely popularized and applied in road vegetation recovery.