Urban greening trees intercept the migration of atmospheric particulate matters near the ground, and it is difficult for the particulate matters trapped by foliage to re-elevate, thus reducing the hafm to humans....Urban greening trees intercept the migration of atmospheric particulate matters near the ground, and it is difficult for the particulate matters trapped by foliage to re-elevate, thus reducing the hafm to humans. The dust-capturing ability and foliar dust size charactetistics of different greening trees are different In addition, the dust capturing of trees is distutbed by many factors such as sel natural and human factors. The foliar dust and natural dustfaJl in 11 common, tree species in Aksu, Northwest China were collected to analyze tihe particle size distribution diacacteristics,and obtain the concentrations of PM^ and PM10. The results showed that Pktanus acenfolia, Populus alba var. pyramidaJis and Uhnus densa. had high foliar dust attachment density and strong particle-capturing capacity,while Elaeagnus angustifoliaL., Pyrns sinldangensis, Sophora japonica L. had low foliar dust attachment density. The foliar PMZ5 and PM10 contents were highest in E. ongustifolia （0.68%） and Vitis vinefcra （3.59%）, tespectively. The volume fraction of fine partides was small in natural dustM and was kige in foliar dust The median of foliar dust particle size followed tiie descending ordei： industrial area 〉 transportation hub area 〉 residential area 〉 clean area; and the median of natural dustfall particle size followed the descending order： dear area 〉 transportation hub area 〉 industrial area 〉 residential area. There was a big difference between the two.展开更多
Nowadays with the rapid development of society, remarkable changes have been taken place in city life. The greening construction of the city can not meet the needs of the residents for the good environment. Recently, ...Nowadays with the rapid development of society, remarkable changes have been taken place in city life. The greening construction of the city can not meet the needs of the residents for the good environment. Recently, many large and medium-sized cities across the country have stepped up investment in country park, Its construction provides a good place to alleviate the pressure of life, Short-distance leisure for the city＇s residents. So it is worth exploring for Gucun Park that how to attract tourists in the fierce competition. The purpose of this paper is to stand in the height of the risk management system, putting forward the corresponding standardized risk response measures, which has great significance to the sustainable operation and development in the future.展开更多
The trees in urban landscapes, independent of whether they are in urban forests or stand alone,can improve environment quality, enhance individual and community well-being, provide a wide range ofservices to individua...The trees in urban landscapes, independent of whether they are in urban forests or stand alone,can improve environment quality, enhance individual and community well-being, provide a wide range ofservices to individuals and communities, and produce a more healthful and comfortable environment forthe vast majority of the population. Knowledge of the potential significance of trees in urban landscapesis expanding rapidly as research continues to document the important role that urban forests and trees canplay in improving the quality of urban life. The environmental conditions in urban landscapes are, however,very different from the natural conditions that the tree species are adapted to. This poses big challenges tothe urban forestry in its efforts to create healthy and valuable trees in urban landscapes. Only throughimplementing some important measures we can ensure high survival rate of saplings and well-being andlongevity of urban trees.展开更多
基金Sponsored by Natural Science Foundation of Xinjiang Uyghur Autonomous Rrgion(2017D01B15)
文摘Urban greening trees intercept the migration of atmospheric particulate matters near the ground, and it is difficult for the particulate matters trapped by foliage to re-elevate, thus reducing the hafm to humans. The dust-capturing ability and foliar dust size charactetistics of different greening trees are different In addition, the dust capturing of trees is distutbed by many factors such as sel natural and human factors. The foliar dust and natural dustfaJl in 11 common, tree species in Aksu, Northwest China were collected to analyze tihe particle size distribution diacacteristics,and obtain the concentrations of PM^ and PM10. The results showed that Pktanus acenfolia, Populus alba var. pyramidaJis and Uhnus densa. had high foliar dust attachment density and strong particle-capturing capacity,while Elaeagnus angustifoliaL., Pyrns sinldangensis, Sophora japonica L. had low foliar dust attachment density. The foliar PMZ5 and PM10 contents were highest in E. ongustifolia （0.68%） and Vitis vinefcra （3.59%）, tespectively. The volume fraction of fine partides was small in natural dustM and was kige in foliar dust The median of foliar dust particle size followed tiie descending ordei： industrial area 〉 transportation hub area 〉 residential area 〉 clean area; and the median of natural dustfall particle size followed the descending order： dear area 〉 transportation hub area 〉 industrial area 〉 residential area. There was a big difference between the two.
文摘Nowadays with the rapid development of society, remarkable changes have been taken place in city life. The greening construction of the city can not meet the needs of the residents for the good environment. Recently, many large and medium-sized cities across the country have stepped up investment in country park, Its construction provides a good place to alleviate the pressure of life, Short-distance leisure for the city＇s residents. So it is worth exploring for Gucun Park that how to attract tourists in the fierce competition. The purpose of this paper is to stand in the height of the risk management system, putting forward the corresponding standardized risk response measures, which has great significance to the sustainable operation and development in the future.
文摘The trees in urban landscapes, independent of whether they are in urban forests or stand alone,can improve environment quality, enhance individual and community well-being, provide a wide range ofservices to individuals and communities, and produce a more healthful and comfortable environment forthe vast majority of the population. Knowledge of the potential significance of trees in urban landscapesis expanding rapidly as research continues to document the important role that urban forests and trees canplay in improving the quality of urban life. The environmental conditions in urban landscapes are, however,very different from the natural conditions that the tree species are adapted to. This poses big challenges tothe urban forestry in its efforts to create healthy and valuable trees in urban landscapes. Only throughimplementing some important measures we can ensure high survival rate of saplings and well-being andlongevity of urban trees.
