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研究表明：（１）百喜草下表层土壤的冲刷量和抗冲性动态过程可用对数方程ｙ＝ａｌｎ（ｘ）＋ｂ进行拟合，但土壤冲刷量和抗冲性的剖面分布不表现出规律性。（２）与裸地和农地比较，百喜草可明显提高表层土壤的抗冲性能，但百喜草下土壤抗冲性的剖面分布与剖面中根系的分布之间无明显的相关性。（３）由于百喜草的葡匐生长习性，使其在径流的冲刷过程中，一方面使径流的侵蚀力下降；另一方面提高了表土的抗冲性。这使百喜草在低丘红粘土性红壤地区可以作为一种较理想的水土保持植物。
The results showed that: (1) The dynamic process of scouring quantity and anti-scouring of the surface soil under Bahia grass could be fitted by the logarithmic equation y = aln (x) + b, but the profile distribution of soil erosion and scouring did not show Regularity. (2) Compared with the bare land and the farmland, Baxi grass can obviously improve the anti-scourability of the surface soil, but there is no obvious correlation between profile distribution of soil anti-scourability and the distribution of root system in the profile. (3) The hippocampus growth habit of Bermudagrass makes the runoff erode force decrease on the one hand, and on the other hand, it increases the impact resistance of topsoil. This makes the hippophae rhamnoides in the hilly red clay red soil region can be used as a more ideal soil and water conservation plants.