中文摘要：

对京杭运河淮安段水利防护林群落的护堤防蚀效应进行了研究.结果表明,防护林植被可以明显改善地表土壤物理性能,明显增加土壤总孔隙度和毛管孔隙度,降低土壤容重.不同植物群落对地表土壤的护堤防蚀效应明显不同.早熟禾群落和女贞群落可以有效提高土壤有机质含量和土壤通气蓄水效应.有植被分布的地表土壤抗蚀性比裸地显著增强（P＜0.05）.相对而言,早熟禾群落土壤水稳性指数最大（0.892）,其余依次为女贞群落（0.835）、梨树群落（0.791）、桃树群落（0.530）、水杉群落（0.397）和裸地（0.341）.植物群落土壤的抗蚀性与植物根系生物量、根数和土壤有机质含量分别呈显著正相关（P＜0.01）.

英文摘要：

Effect of riverside shelter forest communities protecting embankment from erosion in the Huai＇an section of the Beijing-Hangzhou Grand Canal was studied. It was found that the sheher forests significantly improved physical properties of the soil by increasing total porosity and capillary porosity, and decreasing soil bulk density. The effect varied with the composition of the vegetation community. Poa annua communities and Ligustrum lucidum communities significantly in- creased the content of soil organic matter, soil aeration and water holding capacity. Of the embankment, sections covered with vegetation were significantly higher in erosion resistance than those of bare land. Relatively speaking, the soil under Poa annua community was the highest in soil erosion resistance （ 0. 892） , and followed by those under Ligustrum lucidum （0. 835）, Pyrus bretschneideri （0. 791）, Prunus persica （0. 530）, and Metasequoia glyptostroboides （0. 397）, and bare land（0. 341 ）. Positive relationships were observed of soil erosion resistance with root biomass, average root number, and soil organic matter content with correlation coefficient being 0. 961 1, 0. 965 9 and 0. 774 2, respectively.