The Typical Plant Communities Bud-bank Of Poyang Lake And Hydrological Response

Bud bank in wetland is accustomed to harsh environment that alternates of water or land, which taking part in the updating and vegetation succession. Discussion the typical plant communities bud-bank of Poyang Lake and hydrological response on the community can calculate the bottomland wetland vegetation change after the Poyang Lake hydrologic changes. This paper researches on the typical plant communities bud-bank of Poyang Lake from breeding diversity, bud bank reproductive which responsing in submersion and emersion and other aspects.The results were as follows:1) Bud bank propagules Diversification, different species have different morphological characteristics of buds:Some plants such as Carex argyi and Carex cinerascens have strong rhizomes, there are two forms of buds: lateral buds and tip buds. Others rooting under the section as Polygonum criopolitanum and Nymphoides peltatum etc. Vallisneria natans has two main kinds of buds Reproduction:Stolons breeding and tubers breeding.2) According to the indoor training simulation results show that wet cultivation under flooded condition and plant breeding bud bank has significant differences, the species of sensitive with moisture such as Carex argyi, Artemisia selengensis etc., less than10cm flooding depth is enough to inhibit the growth and reproduction. Different species have different response strategies, which are based on these responses reproductive buds form or quantity changes to be embodied.3) Field survey of plant bud bank density and real-time hydrological variation correlation analysis showed that Vallisneria natans buds density is negative correlated to the depth of more than two meters and correlated with other hydrological factors.Conclusion: Bud bank in Poyang Lake mainly composed by the dominant plant species, and bud morphology multiple; The form and number of buds of all the species are responding to flooding; The cloning buds and dormant buds of the submerged aquatic plants’response on the hydrological should be considered.