| 不同演替序列的藻结皮净光合速率日变化特征 |
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| 引用本文： | 苏延桂,李新荣,陈应武,张志山.不同演替序列的藻结皮净光合速率日变化特征[J].兰州大学学报(自然科学版),2010,46(Z1). |
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| 作者姓名： | 苏延桂 李新荣 陈应武 张志山 |
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| 作者单位： | 中国科学院干旱区生物地理与生物资源重点实验室;中国科学院新疆生态与地理研究所;中国科学院寒区旱区环境与工程研究所沙坡头沙漠研究试验站;河南科技大学林学院; |
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| 基金项目： | 国家自然科学基金，国家自然科学杰出青年基金 |
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| 摘 要： | 研究了腾格里沙漠东南缘自然植被区,51龄和27龄人工植被区藻结皮的净光合速率(P_n)在春季和夏季的变化特征,并同步测定了藻结皮的Chla含量.结果表明:三个植被区Chla差异显著(P0.05),依次为51龄(1.84 mg/cm~2)27龄(1.23 mg/cm~2)自然植被区(0.74 mg/cm~2);藻结皮的P_n为0.55～2.8μmol/(m~2·s).春季三个植被区藻结皮的P_n呈单峰型,峰值出现在11:00,自然植被区、51龄和27龄植被区藻结皮的P_n分别为1.77,2.7,2.0μmol/(m~2·s).夏季三个植被区藻结皮的P_n呈双峰型,双峰分别出现在11:00,17:00.11:00时,自然植被区、51龄和27龄植被区藻结皮的P_n为2,2.8,2.2μmol/(m~2·s),17:00时P_n分别为1.8,2.3,1.6μmol/(m~2·s).在两个季节,51龄藻结皮的净光合速率均显著高于27龄和自然植被区的.
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| 关 键 词： | 生物土壤结皮 藻结皮 净光合速率 日变化 |
Photosynthetic characteristic of algal crusts in the desert area |
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| SU Yan-gui,LI Xin-rong,CHEN Ying-wu,ZHANG Zhi-shan.Photosynthetic characteristic of algal crusts in the desert area[J].Journal of Lanzhou University(Natural Science),2010,46(Z1). |
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| Authors: | SU Yan-gui LI Xin-rong CHEN Ying-wu ZHANG Zhi-shan |
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| Institution: | SU Yan-gui~(1,2),LI Xin-rong~2,CHEN Ying-wu~3,ZHANG Zhi-shan~2 (1.Key Laboratory of Biogeography and Bio-resource in Arid Land,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China,2.Shapotou Desert Research and Experiment Station,Cold and Arid Regions and Environmental and Engineering Research Institute,Lanzhou 730000,3.Forestry College of Henan University of Science and Technology,Luoyang 471003,Henan,China) |
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| Abstract: | An field experiment was conducted to measure net photosynthetic velocity in spring and summer of algal crusts at natural vegetation area,51 and 27 years succession in the artificial vegetation area at the southeast of the Shapotou in the Tengger Desert,meanwhile,the Chla was also investigated.Our results showed that Chla differed significantly among crusts in three vegetation area(P<0.05),and it was 51 years (1.84 mg/cm~2))>27 years(1.23 mg/cm~2)>crusts in natural vegetation area(0.74 mg/cm~2 ).The P_n of t... |
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| Keywords: | biological soil crust algal crust net photosynthetic velocity diurnal variance |
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