Dynamics Between Aboveground-belowground Of Herbaceous Plant And Two Types Of Herbivores

The dynamic behavior of resource utilization type competition has been widely stud-ied, in which two herbivores compete for one herb. But most of the research ignores the growth characteristic of herbs. That is when the biomass density of the above ground herbs is zero, the below ground part will transfer energy to the above ground part to help the above ground part to realize the regrowth. Based on the stoichiometry, the paper es-tablish the dynamics model between aboveground-belowground of herbaceous plant and two types of herbivores. In theory, we analyze and explore the influence of the size of the relationship between the nitrogen carbon ratio of the above ground part and nitrogen carbon ratio in the herbivores' body to the growth and reproduction of herbivore popu-lation. Using the numerical simulation to explore the two important factors influencing the dynamic behavior of the system, that is nitrogen density and carrying capacity. In the case that nitrogen density is limited, the paper reveals the Internal mechanism that the competitive advantage between two herbivores happens.