The frequency distribution characteristics of ragweed on secondary succession plant community structure
In the Spring of 2012, with the method of quadrat sampling, a field survey was conducted in secondary succession plant community structure on abandoned naked red soil. 54 species were identified on vegetation type composition belonging to 51 genera , 27 families and 10 invasion of alien species. As the data showed, there were 5 classes of frequency and with the order of A>B=C>D<E. Among all the samples, class A were 91%, class B and class C were both 3.4 %, class E were 1.9%, and class D were 0%.92% invasion of alien species consisting of ragweed, belonging to class E. Ragweed was also the dominant species and constructive species, and it played the pioneer role on secondary succession and had some ecological significance in soil erosion. It also suggested that Ragweed seeds were exceptionally rich and high germination rate in the seed bank of accumulative red soil, which contributed to its rapid seed dispersal.
ragweedfrequencyplant communitysecondary successionseed bank
NETL
NSTL
万方数据
维普
