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| 菊芋(Helianthus tuberoses)蒸腾特性与水分利用效率对光辐射和CO_2浓度变化的响应 | |
| 引用本文： | 林栋,马晖玲,冯朝阳,吕世海.菊芋(Helianthus tuberoses)蒸腾特性与水分利用效率对光辐射和CO_2浓度变化的响应[J].中国沙漠,2010,30(1):74-79. |
| 作者姓名： | 林栋 马晖玲 冯朝阳 吕世海 |
| 作者单位： | 1. 甘肃农业大学,草业学院,甘肃,兰州,730070;草业生态系统教育部重点实验室,甘肃,兰州,730070;中国环境科学研究院,生态所,北京,100012 2. 甘肃农业大学,草业学院,甘肃,兰州,730070;草业生态系统教育部重点实验室,甘肃,兰州,730070 3. 中国环境科学研究院,生态所,北京,100012 |
| 基金项目： | 甘肃省作物遗传改良与种质创新重点实验室项目，教育部春晖计划项目 |
| 摘 要： | 利用便携式光合气体分析系统(LI-6400)在控制光照强度和CO2浓度的条件下,测量和分析了菊芋(Heli-anthustuberoses)的光合速率(Pn)、蒸腾速率(Tr)、胞间CO2浓度(Ci)、气孔导度(Gs)和饱和水汽压亏缺(Vpdl)对不同光辐射(SPR)强度与CO2浓度的响应。结果表明,Pn、Tr、Gs、WUE均随SPR的升高而增大,增幅趋缓,最终趋于动态平衡。Ci与Vpdl则随SPR的增强而减小,SPR高于600μmol.m-2.s-1之后,Ci达到平衡状态。CO2浓度从0增至800μmol.mol-1的过程中,菊芋Pn逐渐增大,从800增至2000μmol.mol-1过程中,其Pn逐渐降低。Ci、Vpdl和WUE随着CO2浓度的升高而增大,Gs和Tr则随CO2浓度的升高而减小。菊芋叶片的光饱和点(LSP)约在1400μmolCO2m-2.s-1,光补偿点(LCP)约19μmolCO2m-2.s-1。 |
| 关 键 词： | 水分利用效率 蒸腾特性 模拟光辐射 CO2浓度 菊芋 |
| 收稿时间： | 2008-12-10; |
Response of Transpiration Characteristics and Water Use Efficiency of Helianthus tuberoses to the Enhancement of Simulated Photosynthetic Radiation and CO_2 Enrichment |
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| LIN Dong,MA Hui-ling,FENG Chao-yang,LV Shi-hai.Response of Transpiration Characteristics and Water Use Efficiency of Helianthus tuberoses to the Enhancement of Simulated Photosynthetic Radiation and CO_2 Enrichment[J].Journal of Desert Research,2010,30(1):74-79. | |
| Authors: | LIN Dong MA Hui-ling FENG Chao-yang LV Shi-hai |
| Institution: | LIN Dong1,2,3,MA Hui-ling1,FENG Chao-yang3,LV Shi-hai3(1.Collage of Prataculture,Gansu Agricultural University,Lanzhou 730070,China,2.Key Laboratory of grassl, Ecosystems,Ministry of Education,Chian,3.Institute of Ecology,Chinese Academy of Environmental Sciences,Beijing 100012,China) |
| Abstract: | To determine how transpiration characteristics and water use efficiency of Helianthus tuberoses respond to simulated photosynthetic radiation enhancement and CO_2 enrichment,the authors used LI-6400 Portable Photosynthesis System to examine photosynthetic rate(Pn),transpiration rate(Tr),intercellular CO_2 concentration(Ci),stomatal conductance(Gs)and vapor pressure deficit based on leaf temp(Vpdl)of Helianthus tuberoses under simulated photosynthetic radiation(SPR)intensities and CO_2 concentration.Pn,Tr,Gs... |
| Keywords: | water use efficiency transpiration characteristics simulated photosynthetic CO_2 concentrations Helianthus tuberoses |
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