DISSERTATION RESEARCH: Combined Effects of Elevated NO2, O3, and CO2 on Plant Growth and Productivity

论文研究：升高的 NO2、O3 和 CO2 对植物生长和生产力的综合影响

基本信息

批准号：
0710005
负责人：
Jed Sparks
金额：
$ 1.2万
依托单位：
Cornell University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2007
资助国家：
美国
起止时间：
2007-06-01 至 2009-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0710005&HistoricalAwards=false
关键词：
DISSERTATION RESEARCH Combined Effects Elevated

项目摘要

The objectives of this study are to determine the single and combined effects of several atmospheric gases likely to increase dramatically in the next century [carbon dioxide (CO2), nitrogen dioxide (NO2), and ozone (O3)] on the leaf physiology and overall growth of sugar maple, eastern hemlock, trembling aspen, and red oak seedlings. The trees are fumigated with elevated (40ppb) or ambient NO2, elevated (560ppm) or ambient CO2, elevated (100 ppb) or ambient O3, and grown in native soil with or without additional soil fertilization. Seedling growth and leaf physiological performance (e.g., photosynthesis, stomatal conductance) will be measured continuously and, at the end of the experiment, total growth of each species will be measured and differences attributed to the exposure to pollution fumigation.Human activities have induced changes in the chemical composition of the atmosphere: the concentrations of CO2, NO2, and O3 have increased and are expected to continue increasing in the future. Plants are both impacted by these gases by altering physiological processes and have the ability to remove gases from the atmosphere and, in some cases, incorporate the carbon and nitrogen from these gases into biomass. Therefore, results from this experiment will increase our understanding of plant productivity in a future atmosphere, how plants may alter the level of gases in the atmosphere, and help to generate a more accurate determination of the carbon-storage potential of trees and ecosystems.

这项研究的目的是确定几种大气气体在下世纪可能会大大增加的单一和综合作用[二氧化碳（CO2），氮二氧化氮（NO2）和Ozone（O3）]对叶片生理学和糖枫糖枫的整体生长，Eastern Heplock，Eastern Heplock，Eastern Heplock，Aspen aspen aspen aspen aspen seper seperlings and Red oak seedlings and Red oak seedlings and Red oak seedlings and Red oak seedlings and trem seperlings sepern and ozone（O3）。将树木用升高（40ppb）或环境NO2，升高（560ppm）或环境二氧化碳，升高（100 ppb）或环境O3熏蒸，并在本地土壤中生长，并没有其他土壤受精。将连续测量幼苗生长和叶子生理性能（例如，光合作用，气孔电导），在实验结束时，将测量每个物种的总生长，并归因于暴露于污染烟雾肿瘤的差异。人类活动的活性诱发了大气的化学成分：No 2，No 2，no 2，以及未来的浓度增长了，并增加了O3的浓度。植物都通过改变生理过程并具有从大气中去除气体的能力来影响植物，并在某些情况下将这些气体中的碳和氮纳入生物质。因此，该实验的结果将提高我们对未来大气中植物生产力的理解，植物如何改变大气中的气体水平，并有助于更准确地确定树木和生态系统的碳储存潜力。