摘要
测量了华北山地阳坡中生灌草群落中4种代表性植物(荆条、狗尾草、龙牙草、鸭跖草)的各项光合参数,并对4种植物的光合特性进行了分析.结果表明,温度与CO2浓度耦合对荆条和狗尾草光合物质的积累影响较大;光照和CO2浓度是影响龙牙草和鸭跖草净光合速率和蒸腾速率的关键因子;荆条光合作用对温度变化不敏感;温度变化对龙牙草A-Ci曲线影响不显著.预测未来华北山地阳坡上生灌草群落优势种分布将依次为:荆条、狗尾草、鸭跖草和龙牙草.
In order to investigate the difference of photosynthesis characteristics of shrub and herb community,the photosynthetic parameters of four representative plants（Vitex negundo,Setaria viridis,Commelina communis,Agrimonia pilosa） in the sunny slop of north China were measured.The results showed that temperature and CO2 concentration coupling had great effects on the photosynthesis biomass production of Vitex negundo and Setaria viridis,light intensity and CO2 concentration were the key factors for Pn and Tr of Agrimonia pilosa and Commelina communis,the temperature change had little effect on A-Ci curve of Agrimonia pilosa and the photosynthesis of Vitex negundo was not sensitive to temperature change.The dominant species in the mountain land of north China in future would be Vitex negundo,Setaria viridis,Commelina communis and Agrimonia pilosa respectively.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2009年第2期122-125,131,共5页
Journal of Gansu Agricultural University
基金
教育部"春晖计划"项目(Z2005-2-62013)
关键词
光合特性
温度
光照强度
CO2浓度
荆条群落
photosynthesis characteristic,temperature,light intensity,CO2 concentration,Vitex negundo community
