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Currently people choose to use indoor foliage pot plants, often focus too much on its decorative nature, while ignoring their ecological functions. In the indoor environment, foliage houseplants study abroad ecological functions relative than less. This study selected a common market in Changsha seven kinds of foliage plants: spider plant (Chlorophytum comosum), Pothos (Scindapsus aurens var. Wilcoxii), short leaves Sansevieria (Sansevieria trifasciata), Money Tree (Pachira macrocarpa), Ficus ( Ficus microcarpa var. pusillifolia), Crassula (Crassula argentea), Little Angels (Philodendron cv Xanadu). Its carbon fixation and oxygen, transpiration endothermic, absorbing harmful gases, dust and other ecological functions sterilization conducted a comparative study, the results are as follows: 1. Carbon fixation and oxygen effects: bright area, 7 day test plants carbon sequestration amount of 7.48 ~ 2.50 g · m-2 · d-1, day oxygen release 5.84 ~ 1.11gm-2 · d-1, Pachira daily maximum carbon fixation and oxygen, carbon sequestration capacity of at 7.48g · m- 2 · d-1, oxygen release date was 5.84 g · m-2.d-1. Half shade area, 7 day test plants carbon sequestration 4.15 · 2.09g · m-2 · d-1, oxygen release date for the 3.40-0.75g · m-2 · d-1, Pachira day carbon fixation and oxygen largest day of carbon sequestration capacity of 4.15g · m-2 · d-1, oxygen release date is 3.40g · m-2 · d-1. Dark zones: 7 day test plants carbon sequestration capacity of 1.81-0.60 g · m-2 · d-1, day oxygen release 0.43-0.24g · m-2 · d-1, with a maximum daily solid gold Ge carbon content 1.81 g · m-2 · d-1. Indoor placed flowers, should be placed close to the window as possible, so as to maximize oxygen releasing carbon sequestration. 2 released water endothermic: Sansevieria release transpiration per unit area of ??water 1053.1 g · m-2 · d-1, endothermic 2510kj · m-2 · d-1, can make the surrounding cooling 0.2 ℃, was significantly higher than the other plants. 3 inhibition: 7 kinds of test plants have antibacterial effects. But the overall result is not satisfactory, the farther away from the potted plants, inhibition rate showed a downward trend. Close to the location of the test plants, Pachira maximum inhibitory effect, inhibition rate of 40%. 4 Dust Role: seven kinds of unit test plants foliage Indigestion significant difference between the amount of dust, dust - in the order of cherubs 4.8986 g/m2 gt; Crassula 2.4004 g/m2 gt; Scindapsus 1.8636 g/m2 gt; fortune Tree 1.7234 g/m2 gt; Chlorophytum 1.6231 g/m2 gt; Ficus 1.3516 g/m2 gt; Sansevieria 0.0789 g/m2. Over time, the amount of dust plants have a slow rise, leaves three-dimensional box-counting dimension is to quantify the roughness of plant leaves is a feasible way. Generally the larger the fractal dimension, the rougher the foliage, the greater the amount unit dust. Fractal dimension in the order Sansevieria 2.7758 gt; little angel 2.6973 gt; Crassula 2.6789 gt; Scindapsus 2.6665 gt; Pachira 2.6238 gt; Chlorophytum 2.5739 gt; Ficus 2.5157 5. Absorb harmful gases: seven kinds of plants tested for formaldehyde , benzene absorption capacity are, terephthalic has a good absorption capacity of the plant, formaldehyde also has good absorption capacity, and absorption capacity than formaldehyde, pothos maximum absorption capacity, not only the initial absorption capacity, absorption sustainable , nine days after the purification rate of 67.7% formaldehyde, benzene purification rate of 72 percent, the worst Pachira, nine days after the purification rate of 26.3% formaldehyde, benzene purification rate of 34.5%. 6 Construction of ecological functions AHP comprehensive evaluation model and the evaluation results are ranked first gold Ge 0.8678, followed by the little angel 0.6227, Sansevieria 0.6136, 0.4956 spider plant, Ficus 0.3461, Crassula 0.2033.
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