Response of Growth and Physiological Characteristics and Root Soil Reinforcement of Artemisia Ordosica to Erosion Damage in Shendong Mining Area

Abstract

To clarify the response mechanism of plant to root erosion damage in Shendong mining areas, Artemisia ordosica was taken as the research object, the response of growth and physiological indexes to root fracture and the effects of cyclic load of erosion force on the tensile properties of root were analyzed. The results showed that the net photosynthetic rate and transpiration rate of A. ordosica leaves decreased with increasing root breakage, the net photosynthetic rate decreased by 17.62%, 26.06% and 42.11%, the transpiration rate decreased by 11.97%, 25.98% and 51.15% after mild, moderate and severe damage, respectively, compared with the control. Compared with the control, the water use efficiency of light, moderate and severe damage increased by 5.39%, 10.74% and 38.43%, respectively; root disruption significantly inhibited the growth of A. ordosica, the growth rate of height, crown width, branch length and diameter decreased by 38.91%, 42.61%, 68.10% and 65.84%, respectively after severe damage compared with the control.