Study On Physiological And Ecological Characteristics Of Vertical Greening Plants In Shenzhen

With the rapid development of urbanization and industrialization, the urban population continues to increase, leading to less and less land to be used for greening, vertical greening as a special form of landscape, not only can make up for the lack of green, but also can make full use of the advantages of space to increase the green area, which is conducive to maintaining ecological balance. Taking Scindapsus aureus,Philodendron mandaianum,Aglaonema commulatum,Scindapsus aureum,Dracaena deremensis,Chlorohytum comosum,Philodendron,Chlorophytum comosum,Chlorophytum comosum,Syngonium podophyllum,Spathiphyllum kochii,Schfflera arboricola,Schefflera odorata,Zebrina pendula,Iris tectorum,Alternanthera bettzickiana,Duranta repen,Excoecaria cochinchinensis,Nephrolepis auriculata as study materials, their growth, photosynthesis, fluorescence, physiological SPAD value, and then nutrient content of leaves were measured, and principal component analysis was used to comprehensively analyze these vertical greening plants, and finally linear regression analysis was used to find out the relationship between net photosynthetic rate and nutrient content, specific leaf weight, SPAD value. Results were as follows:(1) Among vertical greening plants with the matrix of Japan sponge in the indoor environment, Schfflera arboricola grew best and Scindapsus took second place in low light intensity and high soil moisture environment; the difference in growth of vertical greening plants with soil matrix and ceramsite mixture was not very obvious in indoor environment, Philodendron mandaianum grew best and Scindapsus aureum took second place among these plants; the stress resistance ability of Chlorohytum comosum was the strongest, took second place among plants growing in semi open outdoor environment. Scindapsus aureus had the maximum Pn, Gs, Y(II) and ETR value, whereas Schfflera arboricola had the maximum Ls, WUE and Fv/Fm among these, the both plants also showed strong resistance ablity; Schfflera arboricola grew best and Nephrolepis auriculata took second place in outdoor environment,; Alternanthera bettzickiana grew best and Excoecaria cochinchinensis took second place in the same habitat.(2) Most indexes were good for individuals growing on north wall and took second place for individuals growing on in south wall among Schfflera arboricola, whereas those were good for individuals growing on south wall and took second place for individuals growing on west wall among Zebrina pendula.(3) Effects of light intensity, soil water content and their interaction were significant on most physiological indexes of Scindapsus aureus, Philodendron mandaianum, Spathiphyllum kochii, Chlorophytum comosum.(4) The contents of different plant nutrient elements were significantly different in different regions, and those were different for the same plant species in different regions. There were significant correlations between the net photosynthetic rate and N, P, K, Ca and S contents, specific leaf weight(SLW), SPAD.