Research On Plant Configuration Modes And Effects Of Multi Layer Waterscape Based On Aquatic Woody Plants

In order to solve the problems in pure herbaceous landscape such as the simple greening structure,high maintenance,water purification effect and the landscape effect depending on the season,a waterscape plant allocation method is proposed in this paper based on water wet woody plants,combining aquatic woody and herbaceous plants to build a rich water plant landscape.It integrates art,ecology and economy,and accords with the need of ecological waterscape.The waterscape of two parks was investigated and analyzed with the methods of literature induction,field investigation and experimental research.At the same time,we conducted plant resources investigation and summary of the aquatic woody plant.Based on the related principles of aquatic plant landscaping,the landscape configuration model of complex layer plants based on woody plants was constructed,and the plant growth conditions and water quality preservation effects were analyzed through the establishment of laboratory samples.The results of the study are as follows:1.The survey results showed that there were 54 species of aquatic herbaceous plants in Haizhu Lake wetland,and 28 species of aquatic and wet woody plants,most of them used for water banks.The main allocation methods include pure herbaceous clump,arbor herbaceous clump,arbor shrub herb group.In stratified communities mainly as Taxodium distichum and Metasequoia glyptostroboides.There are 50 aquatic herbaceous plants in Ming Lake Park,18 species of aquatic woody plants,and a multi layer waterscape based on aquatic woody and water herbs has been constructed to improve the landscape level and water purification performance.2.According to the principle of screening,based on field research and literature research,we summarized that 46 species of aquatic and wet woody plants and 23 species of herbaceous plants are suitable for Southern C hina.From the results of root activity test,Glochidion zeylanicum,Camptotheca acuminata,Paliurus ramosissimus,Ficus pyriformis,Syzygium tephrodes can adapt to shallow water growth.The root vigor of Paliurus ramosissimus and Ficus pyriformis was higher than other three plants indicating stronger adaptability to water.The photosynthesis of the Glochidion zeylanicum under four water conditions was significantly different.Under the condition of flooding stress with 3cm,the net photosynthetic rate,the stomatal conductance and the intercellular CO ₂ concentration of Hongkong plate still maintain a high level.3.Using the principles of aesthetics,ecological community and plant landscaping,combined with plant net water,ornamental characteristics and seasonal changes,the selected plants were selected to construct 9 kinds of plant configuration patterns.The 9configurations all have a certain purification effect on water quality,in which the two combinations of T7（Callistemon viminalis,Synsepalum dulcificum,Hibiscus tiliaceus,Salvinia natans）and T8（Glochidion zeylanicum,Acorus tatarinowii,Iris tectorum,Vallisneria natans,Hydrocotyle vulgaris）had a better comprehensive reduction effect on TN,NH₄⁺-N,TP,COD_Cr,turbidity and p H,which are better than T10（pure herb combination）.At the end of the experiment,13 woody plants still showed good water adaptability.Based on the experiment,the configuration mode is optimized,and 6improvement modes are put forward.