The Research On The Ecological Function Of Seven Indoor Plants

The ecological function of indoor ornamentals in the city sometimes is ignored in the selection of species. People are inclined to choose those more colorful and beautiful plant in the process of beautification and must pay great attention its ecology function for the human to be healthier,7 species of indoor or namentals were selected as experiment material. They are Chlorophytum comosum, Scindapsus aurens var. Wilcoxii, Sansevieria trifasciata, Pachira macrocarp, Ficus microcarpa var. pusillifolia, Crassula argentea, Philodendron cv Xanadu. The main factors related to the ecological function of plant in this study are O2-emitting, CO2-fixing, adjustment of humidity and heat-absorbing, disinfection and dust-removing. And the results are showed as follows:1.In the fact of nitrogen fixation and oxygen release of 7 species plants:on the place to approaching the window the amount of plants oxygen release is5.84-1.11 g·m-2·d-1,the amount of plants nitrogen fixation is 7.48～2.50g·m-2·d-1 among 7 species plants, the most is Pachira macrocarpa. On the place to away from window 2 meters, the amount of plants oxygen release is 3.14-0.75g·m-2·d-1, the amount of plants nitrogen fixation is 4:15-2.09g·m-2·d-1. Among 7 species plants, the most is Pachira macrocarpa too. In the corner, the amount of plants oxygen release is 0.43-0.24 g·m-2·d-1, the amount of plants nitrogen fixation is 1.81-0.60g·m-2·d-1. Among 7 species plants, Scindapsus aurens var. Wilcoxii is the most.2.In the aspect of water release and absorbed calorie among these plants, Sansevieria trifasciata showed much effect than others and the absorbed calorie value is 2510kj·m-2·d-1,which may cause to decrease 0.2℃.3.7 species plants have the bacteriostasis function. Though the whole effect is not ideal, the most is Pachira macrocarpa. The bacteriostasis rate reaches 40%. Aparting from the pot plant to be farther, the bacteriostasis rate have the obvious declining trend4.The order of the ability of dust-removing among these flowers is Philodendron cv Xanadu>Crassula argentea>Scindapsus aurens var. Wilcoxii> Pachira macrocarpa>Chlorophytum comosum>Ficus microcarpa var.pusillifolia> Sansevieria trifasciata. The fractal dimension is one feasible way to calculate leaf blade roughness. The ability of capture dust was higher when the fractal dimension were bigger and the leaf surface was rougher, but fractal dimension of Sansevieria trifasciata was increased because of bright streak on the leaf.5.7 kinds of plants have the absorbancy to the formaldehyde and the benzene. The plant has the good absorbancy to the benzene and also has the good absorbancy to the formaldehyde, Absorbancy to benzene must be higher than the formaldehyde. The most is Scindapsus aurens var.Wilcoxii and Nine days later the formaldehyde purifying rate reaches 67.7%, the benzene purifying rate reaches 72%. Pachira macrocarpa is the worst little, the formaldehyde purifying rate reaches 26.3%, the benzene purifying rate reaches 34.5%.6.Ecology function quality synthetic evaluation model is constructed with the analytic hierarchy process. Scindapsus aurens var. Wilcoxii (0.8678) is the first. The order of the ability of ecology function is Philodendron cv Xanadu (0.6227)> Sansevieria trifasciata (0.6136)> Chlorophytum comosum (0.4956)> Ficus microcarpa var.pusillifolia(0.3461).