Establishment And Dynamic Analysis Of Flowering Meadow Communities

Flowering meadow has been increasingly emphasized with the rapid rise of flower-tourism.Establishing communities which maintain the long-term steady and sustainability would ensure flowering meadow's healthy development.Based on the analysis of plants composition and structure characteristics in meadow communities,forb-sedge communities of different mixed ratios had been established and dynamics of plant growth and community characteristics were compared in order to explore the proper mixed ratio and plant species.A 5-year-long continuous observation had been carried through to analyse the spatial patterns of prime plant population in flowering meadow.Community and landscape dynamics in 2 years among 3 types of flowering meadows had been compared,the differences of community and landscape performance of different kinds of flower meadows were disscussed.The main results are as follows:1.Carex leucochlora is suitable to establish mixed sown community with flowers.The density ratios(30 strains/m2-120 strains/m2)of C.leucochlora had no significant effects on the gemination rate of flowers,the overall germination rates of communities and the species numbers.C.leucochlora(30 strains/m2-75 strains/m2)would increase the plant height and crown of some kinds of flowers and the average height and crown of low and middle layers in middle and later growth seasons.Therefore,the proper mixed ratio between flowers and C.leucochlora is 5:1-2:1.Biennial flowers which germinate early and grow fast and perennial flowers which tolerant shade well in seedling time and grow fast in the late growth season are suitable to be mixed sowed with C.leucochlora.2.The distribution patterns of prime plant population in 5 years of flower madow were determined,the result shows that during the first two years all kinds of flowers' distribution types were homogeneous and random.Since the third year,the prime flowers' distribution types all changed to aggregate distribution.In the fourth and fifth year inter species in the meadow reached the temporary stable state of distribution and aggregate degree to coexist.3.Annual flowers occupied an important position in the community in the first year and dispeared in the second year.Perennial flowers appeared 5 types:being eliminated in the second year,the important value rising,the important value decling,the important value regular fluctuation and sustainable and the important value stable exist,the latter 4 types occupied important positions since the second year.4.Annual and perennial mixed flowering meadow was higher than annual flowering meadow and perennial flowering meadow in density,plant numbers and diversity at the first year.Perennial flowering meadow had higher community stability all the time and had higher density,plant numbers and diversity since the second year,which contributed to long-term stable development of community.Highly significant positive correlation existed between community diversity and the total density,number of flower species,and had no significant correlation with community coverage.No significant correlation existed between community stability and diversity.5.Annual flowers had a major contribution to the landscape of flowering meadow in the first year,while perennial flowers had a major contribution since the second year.At the first year,annual flowering meadow had the highest flowering species ratio and plants ratio which caused the longest flowering period,annual and perennial mixed flowering meadow had the middle,perennial flowering meadow had the shortest.At the second year,perennial flowering meadow had the highest flowering species ratio and plants ratio which caused the longest flowering period,annual and perennial mixed flowering meadow had the middle,annal flowering meadow had the shortest.The hierarchical structure of flowering meadow changed with time.In the first year it appeared two layers in community after sowing 60-70d,while it appeared three layers after sowing 110-130d.In the second year,it appeared two layers after reviving 20-40d,while it appeared three layers after reviving 60-80d.