
Effects of common garden plants on tolerance, absorption and recovery abilities to NO2 stress
SHENG Qianqian, DAI Anqi, ZHANG Huihui, XU Jingyuan, ZHU Zunling
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (2) : 127-134.
Effects of common garden plants on tolerance, absorption and recovery abilities to NO2 stress
【Objective】Garden plants, which can absorb and purify air pollutants, play an important role in the construction of urban ecological environments. Based on the practical application of urban road greening, we selected common garden plants in Jiangsu Province to study their tolerance, absorption, and recovery abilities under NO2 stress. 【Method】We studied the tolerance, absorption, and recovery abilities of 38 garden plants to NO2 stress using artificial fumigation in the laboratory and screened the plants with strong tolerance, absorption, and recovery abilities. 【Result】 Plants with strong NO2 tolerance and strong absorption and recovering abilities included × Fatshedera lizei, Ilex crenata var. convexa, Litsea pungens, Hedera helix, Euonymus japonicus ‘Aurea-marginatus’, Buxus sinica var. parvifolia. Plants with strong NO2 resistance and strong recovering abilities included Carpinus putoensis, × Fatshedera lizei, Pittosporum tobira, Ilex crenata var. convexa, Buxus sinica, Litsea pungens, Ginkgo biloba ‘Wannianjin’, Euonymus japonicus ‘Aurea-marginatus’, Ophiopogon japonicus ‘Nana’, Hosta ‘Green Gold’, and another 19 species. Plants with the strong absorptive capacities and recovery abilities are Camellia sasanqua, Euonymus japonicus ‘Aurea-marginatus’, Hedera helix, Vinca major ‘Variegata’, Buxus sinica var. parvifolia, Farfugium japonicum, and Iris tectorum. Plants with the strong NO2 tolerance, strong absorption, and recovery abilities are Euonymus japonicus ‘Aurea-marginatus’, Hedera helix, Litsea pungens, × Fatshedera lizei, Ilex crenata var. convexa, Buxus sinica var. parvifolia, and Farfugium japonicum. 【Conclusion】Based on the analysis of NO2 and other pollutants in urban roads in Nanjing over the last six years, it is considered that NO2 is the main pollutant of urban road traffic. The selected plant species with strong tolerance, absorption capacities, and recovery capacities can supplement and improve the NO2-resistant garden plant list in the traditional literature, providing a theoretical basis for the selection and allocation of road greening tree species in NO2 polluted areas and potentially polluted areas.
garden plant / NO2 tolerance / absorption ability / recovery ability / urban road greening
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