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	北京市几种绿化树种的光合特性及生态效益比较
其他题名	Photosynthetic characteristics and ecological benefits of greening tree species in Beijing
	胡耀升; 么旭阳; 刘艳红
来源期刊	西北农林科技大学学报. 自然科学版
ISSN	1671-9387
出版年	2014
卷号	42 期号:10 页码:119-125
中文摘要	【目的】分析评价北京市几种引进树种和乡土树种的光合特性与生态效益,为北京市城市绿化树种的合理选择与配置提供依据。【方法】选择北京市4种主要引进树种(水曲柳、火炬树、七叶树、珙桐)和4种乡土树种(刺槐、侧柏、油松、臭椿),利用Li-6400便携式光合仪测定其光合生理生态指标,采用多元逐步回归分析,模拟净光合速率与各环境因子间的关系,并对各树种的固碳释氧与降温增湿效应进行分析。【结果】除臭椿和油松的净光合速率日变化呈单峰曲线外,其他6个北京市绿化树种净光合速率均呈双峰曲线。影响净光合速率的主要因子是气孔导度、胞间CO_2浓度、光合有效辐射;8个树种中固碳释氧量较高的是臭椿(19.36和14.08 g/m~2)、火炬树(16.99和12.36 g/m~2),较低的是油松(5.97和4.34 g/m~2)、七叶树(10.58和7.69 g/m~2)。降温增湿能力较高的是水曲柳、臭椿,二者的日蒸腾吸热量分别为5 189.82和5 162.31 kJ/(m~2·d),日释水总量分别为2 139.37和2 128.03 g/(m~2·d),降温值分别为0.172和0.171 ℃;降温增湿能力较低的是珙桐、油松,二者的日蒸腾吸热量分别为1 284.05和856.42 kJ/(m~2·d),日释水总量分别为529.32和353.04 g/(m~2·d),降温值分别为0.043和0.028 ℃。【结论】七叶树和水曲柳适用于居民区,而侧柏、油松更适用于干旱区造林,火炬树虽有着较强的竞争优势,但应慎用;选择绿化树种时,要综合考虑引进树种和乡土树种的生态效益,使其价值达到最大化。
英文摘要	【Objective】This study analyzed the photosynthetic characteristics and ecological benefits of introduced and native plants in Beijing to provide references for selection and allocation of greening tree species.【Method】Physiological and ecological indices of four introduced plants (Fraxinus mandshurica,Rhus typhina,Aesculus chinensis,and Davidia involucrata Baill) and four native plants (Robinia pseudoacacia,Platycladus orientalis,Pinus tabuliformis,and Ailanthus altissima) in Beijing were tested by Li-6400 photosynthesis testing system.Furthermore,the relationships between net photosynthetic rates and enviorment factors were analyzed using stepwise multiple regression method and the carbon-capturing,oxygen-releasing,temperature-reducing and humidity-increasing effects of these plants were also studied.【Result】Net photosynthetic rates of Ailanthus altissima and Pinus tabuliformis showed an one-peak diurnal curve,while those of other trees showed a double-peak curve.The major factors affecting photosynthetic rates were stomatal conductance,intercellular CO_2 concentration,and photosynthetic active radiation.Ailanthus altissima (19.36 and 14.08 g/m~2) ,Rhus typhina (16.99 and 12.36 g/m~2) had higher carbon-fixing and oxygen-releasing effects,while Pinus tabuliformis (5.97 and 4.34 g/m~2) ,Aesculus chinensis (10.58 and 7.69 g/m~2) had lower carbon-fixing and oxygen-releasing effects.Fraxinus mandshurica and Ailanthus altissima had higher cooling and humidification ability with the heat absorption amounts of 5 189.82 and 5 162.31 kJ/ (m~2·d) ,the daily water releasing amounts of 2 139.37 and 2 128.03 g/ (m~2·d) ,and the temperature reductions of 0.172 and 0.171 ℃,respectively.Davidia involucrata Baill and Pinus tabuliformis had lower effects with the heat absorption rates of 1 284.05 and 856.42 kJ/ (m~2·d) ,the water releasing amounts of 529.32 and 353.04 g/ (m~2·d) ,and the temperature reductions of 0.043 and 0.028 ℃,respectively.【Conclusion】Aesculus chinensis and Fraxinus mandshurica were suitable for residential areas,and Platycladus orientalis,Pinus tabuliformis were suitable for arid environments.Rhus typhina was with strong competitive capacity while should be treated with caution.Ecological benefits of introduced and native plants should be fully considered to maximize their values.
中文关键词	引进树种 ; 乡土树种 ; 光合特性 ; 生态效益 ; 北京市
英文关键词	introduced plants native plants photosynthetic characteristics ecological benefit Beijing
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5250693
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231885
作者单位	北京林业大学, 北京市森林培育与保护省部共建教育部重点实验室, 北京 100083, 中国
推荐引用方式 GB/T 7714	胡耀升,么旭阳,刘艳红. 北京市几种绿化树种的光合特性及生态效益比较[J]. 北京林业大学,2014,42(10):119-125.
APA	胡耀升,么旭阳,&刘艳红.(2014).北京市几种绿化树种的光合特性及生态效益比较.西北农林科技大学学报. 自然科学版,42(10),119-125.
MLA	胡耀升,et al."北京市几种绿化树种的光合特性及生态效益比较".西北农林科技大学学报. 自然科学版 42.10(2014):119-125.