By using biological five points,expert consultation and fuzzy comprehensive evaluation,the species,phenological ornamental characteristics,and landscape application of colored-leaf trees in Lhasa City were surveyed sy...By using biological five points,expert consultation and fuzzy comprehensive evaluation,the species,phenological ornamental characteristics,and landscape application of colored-leaf trees in Lhasa City were surveyed systematically. The results show that there are 42 species of colored-leaf trees in Lhasa City,belonging to 31 genera and 18 families,of which there are 5,19,and 18 species of spring,autumn,and common colored-leaf trees,accounting for 11.90%,45.24% and 42.86% of total number of the investigated tree species respectively. It is clearly seen that there are too few species of spring colored-leaf trees in the city. There are 19 and 17 species of trees possessing red and yellow leaves,while the leaves of other 6 species of colored-leaf trees are shown in other colors,and the number of their species accounts for 45.24%,40.48% and 14.28% of total number of the investigated tree species respectively. The best ornamental periods of spring,autumn and common colored-leaf trees in Lhasa City average 38.4,41.8 and 251.8 d respectively. Prunus cerasifera Ehrhar f. atropurpurea Rehd.,Ulmus pumila L.,Populus × beijingensis W. Y. Hsu,and Salix alba are applied most frequently in Lhasa City,and their relative frequency is 18.67%,10.29%,9.91% and 8.95% respectively. According to the comprehensive assessment value of their ornamental characteristics,the ornamental characteristics of 15 species of colored-leaf trees in Lhasa City are good or very good,and there is a positive correlation between the comprehensive assessment value and relative frequency. Based on the investigation,the current application situation and problems of colored-leaf trees in Lhasa City were analyzed,and solutions to the problems were proposed.展开更多
Located in the transitional area from subtropical zone to warm temperate zone,Xinyang City is endowed with rich plant resources.With the development of modem urban landscape architecture,Xinyang City has had increasin...Located in the transitional area from subtropical zone to warm temperate zone,Xinyang City is endowed with rich plant resources.With the development of modem urban landscape architecture,Xinyang City has had increasing needs on quality ornamental tree species.In view of the badly-needed ornamental tree species of local landscaping,this paper screened 20 ornamental tree species from the previously-investigated ones,then applied Analytical Hierarchy Process(AHP) to establish the evaluation system according to ornamental characteristics of these species(such as flower color),and used this system to evaluate the preliminarily-chosen species,finally selected 7 species that can be widely applied,and 5 species that can be moderately applied.展开更多
采用人工模拟熏气办法,研究13种乡土绿化树种对城市中HC l和HF气体的反应。云南红豆杉、长梗润楠、翠柏、麻栗坡含笑、南亚含笑、脉叶虎皮楠对HC l气体的抗性弱。HC l浓度为1.0m g.m-3时,滇润楠、云南拟单性木兰、云南含笑、鸡嗉子树种...采用人工模拟熏气办法,研究13种乡土绿化树种对城市中HC l和HF气体的反应。云南红豆杉、长梗润楠、翠柏、麻栗坡含笑、南亚含笑、脉叶虎皮楠对HC l气体的抗性弱。HC l浓度为1.0m g.m-3时,滇润楠、云南拟单性木兰、云南含笑、鸡嗉子树种具有较强抗性及净化能力,净化量依次为141.8、283.6、354.5、425.4 m g.k-g 1和1 063.5 m g.k-g 1。HF浓度为1.0 m g.m-3时,山玉兰、灯台树、川滇三角枫叶片F净化量依次为0.9、1.9 m g.k-g 1和4.9 m g.kg-1。结果表明,滇润楠、鸡嗉子、山玉兰、云南拟单性木兰、云南含笑、灯台树等树种对HC l气体具有较强的抗性和净化能力,翠柏、云南红豆杉、山玉兰、灯台树、川滇三角枫等树种对HF气体具有一定的抗性和净化能力,试验结果可以为乡土绿化树种的选择和应用提供科学依据。展开更多
基金Sponsored by National Natural Science Foundation of China(51568059)
文摘By using biological five points,expert consultation and fuzzy comprehensive evaluation,the species,phenological ornamental characteristics,and landscape application of colored-leaf trees in Lhasa City were surveyed systematically. The results show that there are 42 species of colored-leaf trees in Lhasa City,belonging to 31 genera and 18 families,of which there are 5,19,and 18 species of spring,autumn,and common colored-leaf trees,accounting for 11.90%,45.24% and 42.86% of total number of the investigated tree species respectively. It is clearly seen that there are too few species of spring colored-leaf trees in the city. There are 19 and 17 species of trees possessing red and yellow leaves,while the leaves of other 6 species of colored-leaf trees are shown in other colors,and the number of their species accounts for 45.24%,40.48% and 14.28% of total number of the investigated tree species respectively. The best ornamental periods of spring,autumn and common colored-leaf trees in Lhasa City average 38.4,41.8 and 251.8 d respectively. Prunus cerasifera Ehrhar f. atropurpurea Rehd.,Ulmus pumila L.,Populus × beijingensis W. Y. Hsu,and Salix alba are applied most frequently in Lhasa City,and their relative frequency is 18.67%,10.29%,9.91% and 8.95% respectively. According to the comprehensive assessment value of their ornamental characteristics,the ornamental characteristics of 15 species of colored-leaf trees in Lhasa City are good or very good,and there is a positive correlation between the comprehensive assessment value and relative frequency. Based on the investigation,the current application situation and problems of colored-leaf trees in Lhasa City were analyzed,and solutions to the problems were proposed.
基金Sponsored by Natural Science Foundation of China(31360197)Young Teachers'Scientific Research Fund of Xinyang Agriculture and Forestry University(201101019)
文摘Located in the transitional area from subtropical zone to warm temperate zone,Xinyang City is endowed with rich plant resources.With the development of modem urban landscape architecture,Xinyang City has had increasing needs on quality ornamental tree species.In view of the badly-needed ornamental tree species of local landscaping,this paper screened 20 ornamental tree species from the previously-investigated ones,then applied Analytical Hierarchy Process(AHP) to establish the evaluation system according to ornamental characteristics of these species(such as flower color),and used this system to evaluate the preliminarily-chosen species,finally selected 7 species that can be widely applied,and 5 species that can be moderately applied.
文摘采用人工模拟熏气办法,研究13种乡土绿化树种对城市中HC l和HF气体的反应。云南红豆杉、长梗润楠、翠柏、麻栗坡含笑、南亚含笑、脉叶虎皮楠对HC l气体的抗性弱。HC l浓度为1.0m g.m-3时,滇润楠、云南拟单性木兰、云南含笑、鸡嗉子树种具有较强抗性及净化能力,净化量依次为141.8、283.6、354.5、425.4 m g.k-g 1和1 063.5 m g.k-g 1。HF浓度为1.0 m g.m-3时,山玉兰、灯台树、川滇三角枫叶片F净化量依次为0.9、1.9 m g.k-g 1和4.9 m g.kg-1。结果表明,滇润楠、鸡嗉子、山玉兰、云南拟单性木兰、云南含笑、灯台树等树种对HC l气体具有较强的抗性和净化能力,翠柏、云南红豆杉、山玉兰、灯台树、川滇三角枫等树种对HF气体具有一定的抗性和净化能力,试验结果可以为乡土绿化树种的选择和应用提供科学依据。
