Effects of Elevated CO<sub>2</sub> on Carbon and Nitrogen Contents of Calamagrostis Angustifoliain Wetland of Sanjiang Plain

ZHAO Guang-ying; LIU Jing-shuang; ZHANG Xue-ping; WANG Yang

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Effects of Elevated CO₂ on Carbon and Nitrogen Contents of Calamagrostis Angustifoliain Wetland of Sanjiang Plain

- Effects of Elevated CO₂ on Carbon and Nitrogen Contents of Calamagrostis Angustifoliain Wetland of Sanjiang Plain
- Bulletin of Soiland Water Conservation Vol. 32, Issue 1, Pages: 87-91(2013)
- 作者机构：
  
  1. 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室,吉林,长春,130012
  2. 黑龙江省普通高等学校地理资源与环境遥感重点实验室哈尔滨师范大学,黑龙江,哈尔滨,150025
- 作者简介：
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- Published：2013
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ZHAO Guang-ying, LIU Jing-shuang, ZHANG Xue-ping, et al. Effects of Elevated CO₂ on Carbon and Nitrogen Contents of Calamagrostis Angustifoliain Wetland of Sanjiang Plain[J]. Bulletin of Soiland Water Conservation, 2013, 32(1): 87-91.
DOI：

ZHAO Guang-ying, LIU Jing-shuang, ZHANG Xue-ping, et al. Effects of Elevated CO₂ on Carbon and Nitrogen Contents of Calamagrostis Angustifoliain Wetland of Sanjiang Plain[J]. Bulletin of Soiland Water Conservation, 2013, 32(1): 87-91. DOI：

摘要

利用开顶箱薰气室(open-top chamber)

设置正常大气CO

浓度和高CO

浓度(700μmol/mol)2个水平和不施氮(NN

0g/m

)、常氮(MN

5g/m

)和高氮(HN

15g/m

)3个氮素水平

研究CO

浓度升高对三江平原草甸小叶章碳氮积累的影响。结果表明

浓度升高条件下小叶章植株总固碳量增加

不同氮水平下小叶章总固碳量分别增加19.3%(NN)

24.4%(MN)和24.6%(HN)

且根固定碳量占植株总体碳库比例均有不同程度的提高。CO

浓度升高降低了小叶章各器官氮含量

其中叶、茎氮含量以抽穗期降幅最大(14.4%和19.5%)

根氮含量以腊熟期降幅最大(17.4%)。小叶章各器官N含量的降低是由于CO

浓度升高条件下植株生长加快引起的稀释效应所致。

Abstract

An experiment with treatments differing in nitrogen supply(0

5and 15g/m2)and CO2 level(360and 700μmol/mol)with OTC(open top chamber)equipment was carried out to investigate the effects of elevated CO2concentration on the carbon and nitrogen accumulation of Calamagrostis angustifoliain freshwater marsh of the Sanjiang Plain.Results showed that elevated CO2concentration increased carbon fixation ofplant by 19.3%

24.4% and 24.6% under the NN

MN and HN treatments

respectively.Elevated CO2concentration also had a great impact on the carbon allocation in different parts of Calamagrostis angustifolia

as the carbon distribution in root increased to different degrees under all the nitrogen treatments.Elevated CO2 concentration reduced the nitrogen content of Calamagrostisangustifoliaapparatus. The largest decrease in leaf and stem both appeared in heading period(14.4% and 19.5%)

while the decrease in root appeared in dough period(17.4%).The decrease of nitrogen content in apparatus was due to diluting effect byplant speeding growth under elevated CO2 concentration.

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Effects of Elevated CO2 on Carbon and Nitrogen Contents of Calamagrostis Angustifoliain Wetland of Sanjiang Plain

DOI：

摘要

Abstract

关键词

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references

Effects of Elevated CO₂ on Carbon and Nitrogen Contents of Calamagrostis Angustifoliain Wetland of Sanjiang Plain