关键词: 根-土模拟试验, 人造根材料, 人造根构型, 优化设计, 水土流失防治

Abstract: The artificial roots, as a substitute for real roots in root-soil simulation experiments, have been widely applied in researching the relationship between roots and soil erosion. In this paper, a wide range of artificial root materials and configurations, the main experiments by artificial roots and the method for verifying validity of artificial root are summarized. Through research and analysis, some problems can be revealed such as that because of without consideration the biochemical reaction, the artificial roots can not simulate the reinforcement effect of fibrous root plants on soil; the root surface is too smooth that can not provide same friction than the real root does; Rainfall interception function of plant branches and leaves is neglected. Therefore, several measures are put forward to solve the above problems: (1) avoiding biochemical reaction of root-soil surface through the measures of material selection optimization, rational arrangement and surface protection; (2) proposing a new artificial root architecture to simulate the fibrous root system; (3) roughing the surface of artificial root to increase root soil contact area and roughness; (4) adding plant rainwater retaining structure on the above ground part of the artificial root in the rain test. It is hoped that this paper can deepen the understanding of artificial roots so as to improve and develop artificial root technology.

Key words: root and soil simulation test, artificial root material, artificial root structure, optimization design, soil erosion prevention