The results showed that the distribution of herbaceous vegetation was observably negatively correlated with the distribution of sand dunes, elm trees and aeolian pits, respectively.

• X2检验结果显示榆树、沙丘、风蚀坑三者在分布上相互之间存在极显著的正关联关系；草本植被的分布分别与榆树、沙丘、风蚀坑的分布之间存在极其显著的负关联关系.