3.2 Effects of soil water content and soil nutrient content on
invasion by P. kansuensis
The RR value represents the response rate for P. kansuensisinvasion shown by the environment. The results showed that the response
rate was significant for soil organic carbon (SOC), soil nitrogen (SN),
and soil phosphate (SP); extremely significant for SW; but not
significant for soil potassium (SK). Our results indicated that SW and
soil nutrient content were the main factors determining invasion byP. kansuensis and that SW plays the most important role (Fig. 2).