Effect of different invasion degrees of Cenchrus pauciflorus on plant ;communities characteristics
To explore the invasion mechanisms of Cenchrus pauciflorus and develop effective control measures, this paper studied four different invasion degrees communities composition of Cenchrus pauciflorus. The results showed that species composition of C. pauciflorus plant communities consisted of 37 species that belong to 30 genera 13 families. Among them, the Gramineae grass accounted for the vast majority, then the Compositae, Leguminosae and Chenopodiaceae, and the other families of plant frequency was very low. When the damage degree of Cenchrus pauciflorus was more than 15%in the grassland, the Gramineae grass increased rapidly, while the importance value of Compositae and Chenopodiaceae grass decreasied a little. The dominance of Setaria viridis and Salsola col ina were emerging. Diversity index, dominance index, evenness index and richness index were also al in the order no hazard areas (damage degree<15%)>mildly invaded areas (damage degree16%-35%)>moderately invaded areas (damage degree 36%-50%)>heavily invaded areas (damage degree>50%). In brief, the diversity of terrestrial plant in invaded area decreased with Cenchrus pauciflorus invading.
Cenchrus pauciflorusinvasion degreeplant community characteristicsplant diversity
NETL
NSTL
万方数据
维普
