铀尾矿库茅草植物根系发育的分形特征

Study on Fractal Characteristics of Plant Root Development of Lemongrass in Uranium Tailing

研究了非线性科学中的分形几何理论，并将其应用到植物根系发育的结构上，对铀尾矿库上采集的茅草（Lemongrass）植物根系分形特征进行了研究。用FractalFox软件计算了植物根系的分形维数，结果发现：这种植物根系分维数都介于1．3305-1．5214之间，说明这种植物根系分形特征明显。实验中还发现生长在水环境旁的根系分维数明显高于在干燥环境下的根系分维数，说明湿润的环境能促进植物根系发育。

Through the study of theory of fractal geometry in nonlinear science ,the article applies it to the structure of the plant root development and analyzes the fractal characteristics of root of lemongrass which is collected from the uranium tailing .the article uses Fractal Fox software to calculate the fractal dimension of plant roots ,and the results showed that the fractal dimension of plant roots changes between 1 .258 to 1 .470 ,which indicates that the fractal characteristics of roots are obvious .In addition ,the experiment discovers that the fractal dimension of plant roots beside the water environment is obviously higher than that in the dry environment , which show s that humid environment can promote the development of plant roots .