| With the continuous development of the water conservancy engineer,project especially the dike project in Jiangxi Province,especially in the continuous advance of the dike project,it is an important issue to popularize and use ecological slope protection in the construction of the embankment in Jiangxi province.Based on the field investigation and the long-term,continuous observation data,and according to the characteristics of different grass species and the embankment type in Jiangxi province,this paper determined the suitable grass species and embankments grass planting method for the construction of our province ecological slope protection by a field experiment,which would provide theoretical foundation and scientific basis for the construction of our province excellent landscape ecological slope protection.The main results of this study were as followings:(1)The dike plants were amounted to 106 species,belonging to 38 families and 89 genera。They were dominated by herbaceous plants,totally 74 species.The others were trees,shrubs and lianas,respectively 8,21,and 3 speices.The common dike plants have 22 species,the dominant herbaceous plants were mainly gramineousand Composite,the common dike gramineous plants have Eremochloaophiurodies,Cynodondactylon,Zoysia japonica,Poaannua,Imperatacylindricavar.major,Miscanthussinensis,Eleusineindica,Digitariasanguinalis,Eragrostisferruginea,Phragmitascommunis,and so on.The harm of weed identification was found there were 10 kinds of common weeds with strong hazard that were Imperatacylindricavar.major,Miscanthussinensis,Eleusineindica,Digitariasanguinalis,Phragmitascommunis,Erigeron annuus,Rosa cymosa,Equisetum ramosissimum,Meliaazedarach L,Broussonetia papyrifera(L.)L’Hert.ex Vent.(2)In embankment,the dominant grass species of natural turf was mainly Centipedegrass and Bermudagrass,and the dominant degree above 60%.The dominant grass species of artificial planting was mainly Bermudagrass and Zoysiagrass,and the dominant degree more than 80%.Combined with planting grass species characteristic and grass protection experience,we intended to select centipede grass,Bermudagrass andzoysia grass for the target species.(3)The plant species composition,importance value,diversity index and soil seed bank density were different in the embankment,which was highest in paddy soil,followed by construction waste,and was lowest in mountain clay.Soil seed bank in the study area were mainly distributed in 0~10cm,the selection of soil material for embankment has important influence on the vegetation characteristics and the density of soil seed bank.The distribution of weeds was mainly influenced by the soil seed bank,so it is a necessary measure to block the spread of weeds seed source before the dike grass is not completely turf.(4)The experiment found that the rate of germination and field coverage for bermudagrass,zoysiagrass were high,suitable for planting on Jiangxi,Centipedegrassused grass stems of asexual reproduction was best.The key technology of slope protection planting for Jiangxi embankment are the following several aspects: 1)soil pretreatment technology;2)slope drainage system;3)growth regulator and controlling plant height technique;4)centipedegrass clonal propagation technique;5)grass sexual reproduction technology.Up to now,the dike in Jiangxi province has established six demonstration zones for ecological slope protection,demonstration area total 138720m2. |
