Study on Distribution Characteristic and Tensile Strength of Slope Eco-Engineering Plant Root

In order to study the mechanism of plant root, taking Cynodon dactylon、Arundo donax and Poa annua as the research projects, to study the distribution characteristic and tensile strength, the results show that with the increase of the soil depth, the amount of these 3 kinds of plant roots are gradually reducing, and the most roots on top of the soil. Through the fitting, the power function model can better reflect the roots spatial distribution. On the roots tensile properties, 3 kinds of plant roots showed the tensile capacity, the roots tensile force show positive power function correlated relation with the roots diameter, 3 kinds of roots tensile force ordinal for Arundo donax > Cynodon dactylon >Poa annua. The tensile strength show negative power function relation with the root diameter, with the roots diameters enlarge, the tensile strength is gradually reducing.