| 摘要: |
| 依据在大型人工气候室内进行的试验，分析了空气中ＣＯ2浓度增加对春小麦叶片气孔阻力、叶温、光合速率、蒸腾速率、生长状况和叶片水分利用效率及总蒸发蒸腾量的影响。结果表明，大气ＣＯ2浓度增加一倍，叶片气孔阻力在充分和中等供水条件下平均增加１２５．６７％，在干旱条件下增加４７．９３％；叶温平均增高１．１℃；光合速率增大２．５６９倍；蒸腾速率减小３９．２％；叶面积增加１７．６％；株高增加２０．８％；叶片水分利用效率平均增加３．０５７倍；总蒸发蒸腾减小１０．０４％。 |
| 关键词: 气候，CO2浓度，气孔阻力，蒸发蒸腾，光合作用，叶片水分利用效率 |
| DOI： |
| 分类号:S512.101 |
| 基金项目:霍英东基金和国家自然科学基金资助项目 |
|
| Effects of the Atmospheric CO2 Concentration Increase on the Water Use Efficiency and Evapotranspiration of Spring Wheat |
|
Kang Shaozkong Cai Huanjie Liu Xiaoming,Kang Shaozkong Cai Huanjie Liu Xiaoming,Kang Shaozkong Cai Huanjie Liu Xiaoming
|
| Abstract: |
| This paper analysed the effects of the atmospheric carbon dioxide (CO2)
on leaf stomatal resistance,leaf temperature,photosynthesis rate,transpiration rate,
growth state and leaf wate ruse effeicency,as well as the total evapotranspiration in the
spring wheat growing season,based on the measured data in the artificial climate houses.The study showed that the leaf stomatal resistance increased by 125.66% with the
doubling of CO2 concentration and sufficient soil water supply;but it increased only by
47.93% under dry conditions.The average leaf temperature increased by 1.1℃,the photosynthesis by 2.569 times,the leaf area index and crop height by 17.6% and 20.8% respectively,but the leaf transpiration rate and the total evapotranspiration decreased by
39.2% and 10.04% respectively.Thus,the leaf water use efficiency increased by 3.057
times。 |
| Key words: climate,carbon dioxide concentration, leaf stomatal resistance,evapotranspiration,photosynthesis,leaf water use efficiency |
