Study On Wetland Tree Species Selection And Its Landscape Quality Improvement Chao Lake Area In Anhui Province

Based on the investigation of existing plant community characteristics in Chao Lake Area,this paper mainly studied the Binhu National Forest Park.Through the analyze on the physical and chemical charismatics,ornamental effection,,we found out some suitable tree species.And combined with the selection of suitable native and exotic water-tolerant tree species for planting experiments.Comparing the survival rate and growth of plants under different flooding depths and flooding duration,the suitable tree species suitable for vegetation restoration and landscape improvement in the surrounding area of Chao Lake were deliminator selected,and plant matching patterns and landscapes were constructed for different site conditions.Evaluation analysis.The results were as follows:(1)The area around the Chao Lake is rich in vegetation.There are 362 species of wetland plants,89 families and 274 genera.Among them,the main woody plant communities include poplar community,weeping willow community,sweet gum community,and camphor community.There are abundant plant species under the forest,and the main dominant herbaceous plant communities include Compositae,Gramineae,Labiatae,Scrophulariaceae,and Cyperaceae.The experimental site Binhu National Forest Park has 86 families,204 genera and 281 species of vascular plants.(2)The soil in the test area of the Chao Lake is paddy soil,the soil bulk density is about 1.36 g/cm3,and the texture is more viscous;the soil porosity is clearly differentiated according to the topography,and the soil porosity and normal index in the higher terrain(55%)Compared with the low level,the average is 50.1%;the soil porosity in the lower terrain is within the range of clay(40-60%),both being 48.6%,which can meet the requirements of cultivated soil for plant growth;the pH value of soil is 7.0.The organic matter(27.0g/kg)and total nitrogen(1.25g/kg)are suitable for the growth of general tree species.(3)The Binhu National Wetland Park is dominated by poplar trees.Due to the large age of the trees,high groundwater level and excessive planting density,the forest stands decline.In this study,23 species were preliminarily selected as renewed species for survival and growth observation.Five native tree species were selected:Bischofia polycarpa(92%),Gleditsia sinensis(92%),and Acer palmatum(88).%),Astragalus Cotinus coggygria(88%),and Fraxinus chinensis(88%)have a higher survival rate;among the three exotic species,Sequoia sempervirens(92%),Acer negundo(92%),thin Carya illinoinensis(92%)has a high survival rate and is suitable for planting in the nesting lake area.(4)According to different water level conditions and terrain slope,combined with plant biological characteristics and landscape aesthetics,construct 1 aquatic habitat(Iris sinensis-dwarf sage group;aquatic canna sage-sage group).2 shore with wet(water candle cattail-water onion cluster)and so on.3 terrestrial habitat community(North American redwood-fragrant-Camellia-Ophiopogon japonicus;privet-Wuhuan-mulberry tree-lobular privet-octagonal golden platter-ryegrass;citron-palm-Lamei-Lagerstroemia-Nantianzhu-Dawu Fengcao-Orchid Sanqi-Sage,etc.)3 types of plant community structure.(5)According to the "AHP" evaluation,the landscape quality of Hefei Binhu National Forest Park has a total score of 81.24 points.It is superior in the landscape evaluation of wetland forest parks.The ecological environment inside the park is suitable and the species diversity is rich.The wetland area accounts for Larger,which is good for the growth of wet plants.The wetland landscape quality index score is 76.52 points,which is at the medium level.The environmental plaques in the park waters account for a large proportion,but the water quality is general,the number of plaque types is medium,the abundance is general,the overall internal landscape fragmentation is high,and the spatial structure is complex.Diverse.The score of wetland social and cultural value index is 83.53 points,which indicates that Binhu National Forest Park has obvious regional cultural characteristics,and the tourism leisure value and scientific research environment are good.The internal plant configuration is distinct,the season phase changes obviously and the overall environment is better.