文章摘要
段利民, 闫雪, 刘廷玺, 王冠丽, 童新.多重情景下半干旱地区人工杨树林光合生理特征[J].水土保持学报,2019,33(1):213~220,226
多重情景下半干旱地区人工杨树林光合生理特征
Photosynthetic Physiological Characteristics of Artificial Populus in Semi-arid Area Under Multiple Scenarios
投稿时间:2018-06-17  
DOI:10.13870/j.cnki.stbcxb.2019.01.034
中文关键词: 光响应曲线  CO2响应曲线  净光合速率  蒸腾速率  水分利用率
英文关键词: light response curve  CO2 response curve  net photosynthetic rate  transpiration rate  water use efficiency
基金项目:国家自然科学基金项目(51869017,51620105003,51369016);内蒙古自治区高等学校青年科技英才支持计划项目(NJYT18-B11);教育部创新团队发展计划项目(IRT_17R60);科技部重点领域创新团队项目(2015RA4013);内蒙古自治区草原英才产业创新创业人才团队项目
作者单位E-mail
段利民1,2, 闫雪1,2, 刘廷玺1,2, 王冠丽1,2, 童新1,2 1. 内蒙古农业大学水利与土木建筑工程学院, 呼和浩特 010018

2. 内蒙古自治区水资源保护与利用重点实验室
, 呼和浩特 010018 
txliu@imau.edu.cn 
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中文摘要:
      深刻剖析多重情景下主要防风固沙树种的光合生理特征,对半干旱地区生态系统的健康维持与恢复重建具有重要的指导意义。以半干旱典型区科尔沁沙地人工杨树为研究对象,采用Li-6400红外气体分析仪活体测量生长季不同月份、嫩叶与成熟叶、上午与下午以及不同CO2浓度和光强下杨树叶片的光响应和CO2响应曲线,进一步对比分析这些情景下净光合速率(Pn)、蒸腾速率(Tr)和水分利用率(WUE)的差异性。结果表明:在相同光强和CO2浓度下,生长旺盛期杨树叶片的Pn高于生长初期和生长末期;嫩叶与成熟叶的PnTr、WUE差异明显,嫩叶的蒸腾作用相对较强,成熟叶的光合作用相对较强。研究结果对开展半干旱地区人工杨树光合生理相关研究具有一定的参考价值。
英文摘要:
      Fully analyzing the photosynthetic physiological characteristics of the main sand-fixing species in multiple scenarios has important scientific meanings for the maintenance and reconstruction of the ecosystem. The artificial Populus of Horqin Sandy Land was selected as the test materials to measure the light response and CO2 response curves by using Li-6400 infrared gas analyzer. The testing scenarios included comparison across different months, tender and mature leaves, morning and afternoon, as well as different CO2 concentrations and light intensity environments. Further, the net photosynthetic rate (Pn), transpiration rate (Tr) and water use efficiency (WUE) were analyzed. The results indicated that:Under the same light intensity and CO2 concentration, the Pn at vigorous growth period was larger than that at the initial and late growth periods. The Pn, Tr and WUE were significantly different by comparing tender and mature leaves, the transpiration of tender leaves was relatively stronger, while photosynthesis of mature leaves was relatively stronger. These findings provided main reference value for the study of the physiology of artificial Populus in semiarid areas.
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