干旱区研究2014，Vol.31Issue(3)：542-549,8.
梭梭与白梭梭气体交换特征对比分析
Gas Exchange of Haloxylon ammodendron and H. persicum
摘要
Abstract
Haloxylon ammodendron and H.persicum are two main edificators in the Gurbantonggut Desert,Xinjiang.Based on the simultaneous observations of photosynthetic characteristics and related environmental factors affecting the growth of H.ammodendron and H.persicum,different photosynthetic responses of the two species to environmental factors were studied.Results showed that H.ammodendron was better in using lowlight than H.persicum,but it was contrary in using highlight.The curves of daily variation of net photosynthetic rate,stomatal conductance and transpiration rate were all unimodal,the time of occurring the peak values of net photosynthetic rate and stomatal conductance was slightly different,and the peak value of transpiration rate occurred always at 16:00.According to the variation of photosynthetic rate,intercellular CO2 concentration and stomatal limitation of H.ammodendron and H.persicum,it was considered that the "midday depression" of photosynthesis was mainly caused by stomatal factors.The daily averages of photosynthetic rate,transpiration rate and water use efficiency of H.persicum were higher than those of H.ammodendron.Correlation analysis revealed that the photon flux density was the most significant environmental factor affecting the photosynthetic rate of H.ammodendron and H.persicum.关键词
梭梭(Haloxylon ammodendron)/白梭梭(H persicum)/光合作用/气体交换/环境因子/古尔班通古特沙漠Key words
Haloxylon ammodendron / Haloxylon persicum/ photosynthesis / gas exchange / environmental factor/Gurbantonggut Desert引用本文复制引用
田媛,塔西甫拉提·特依拜,徐贵青..梭梭与白梭梭气体交换特征对比分析[J].干旱区研究,2014,31(3):542-549,8.基金项目
国家自然科学基金(41130531) （41130531）
教育部长江学者和创新团队(IRT1180) （IRT1180）
国家国际科技合作项目(2011DFA31070) （2011DFA31070）
西部之光(XBBS201001) （XBBS201001）
