The Research Of Changes In Plant Physical Traits And The Relationship With Substantial Basein Recovery Succession Process

The shear resistance, bending resistance and tensile strength and five substantial base indexes were chosen to research changes in plant physical traits and their relationships with substantial base in different stages of recovery succession community in this paper. Five substantial base indexes which are mentioned above were LDMC,LMA,ADF,ADL,Si. As a result, the response of grass to grazing could be discussed.The conclusion is as follows:1. The physical traits of grass could be measured.2. The physical traits were defined by species , the dynamic of growthseason and the state of communities as well. So the plant physical traitswere associated with ecology functions.3. The substantial base indexes to measure the physical traits include LMA,ADF and ADL. ADF is the main composition of cell wall and plant mechanical tissue. Basically ADF and LMA could decide the physical traits of plants which were used to calculate the values of the physical traits via a tropical equation. Especially ,the LMA could be regarded as an index of describing physical traits.4. There were evidently positive correlations among the three physical traits. Thus, varies of physical traits were still consistent in the different stages of recovery succession community.5. The resisting behaviors of grass against grazing were analyzed. There were several ways for plants to impose the negative feedback of plant on graze, which included either the collective behaviors like the individual miniaturization, or individual behaviors such as the changes of the physical traits. As consequence the different behaviors of populations were existent in the degradation succession of grassland communities.