青海果洛黄河源区高寒草甸CO2释放速率研究

doi:10.11733/j.issn.1007-0435.2007.05.009

›› 2007, Vol. 15 ›› Issue (5): 449-453.DOI: 10.11733/j.issn.1007-0435.2007.05.009

青海果洛黄河源区高寒草甸CO₂释放速率研究

孙步功¹, 龙瑞军^2,3, 孔郑¹, 冯瑞章¹

1. 甘肃农业大学草业学院, 甘肃, 兰州, 730070;
2. 中国科学院西北高原生物研究所, 青海, 西宁, 810001;
3. 兰州大学草地学院, 甘肃, 兰州, 730000

收稿日期:2007-03-08 修回日期:2007-07-25 出版日期:2007-10-15 发布日期:2007-10-15
通讯作者: 龙瑞军,E-m ail:longr j@gsau.edu.cn
作者简介:孙步功(1971- ),男,甘肃通渭人,副教授,博士研究生,从事草地生态研究,E-mail:sunbg@gsau.edu.cn
基金资助:
国家“十五”科技攻关计划项目(2001BA606A-02-03);中国科学院“百人计划”项目(30371021)

A Study on CO₂ Emission Rate from Alpine Meadow in the Source Region of Yellow River in Guo-luo, Qing-hai Province

SUN Bu-gong¹, LONG Rui-jun^2,3, KONG Zheng¹, FENG Rui-zhang¹

1. Pratacultural College, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China
2. Northwest Institute of Plateau Biology, CAS, Xining, Qinghai Province 810001, China;
3. College of Grassland Science, Lanzhou University, Lanzhou, Gansu Province 730000, China

Received:2007-03-08 Revised:2007-07-25 Online:2007-10-15 Published:2007-10-15

摘要/Abstract

摘要： 以青海果洛黄河源区高寒退化草甸生态系统为对象,应用静态密闭箱-气相色谱法对高寒退化草甸生态系统CO₂释放进行了初步研究。结果表明:所选4种不同退化程度高寒草甸,即未退化草甸(A)、轻度退化草甸(B)、中度退化草甸(C)和重度退化草甸(D),其CO₂释放速率有明显的日变化特征,日最大排放速率在15:00-17:00左右出现,最低值出现于清晨7:00-9:00左右,释放白天大于夜晚;(2)CO₂释放速率具有明显的季节性变化特征,生长期CO₂释放速率明显高于枯黄期,8月为CO₂释放高峰期,1月或2月为CO₂释放低谷期;(3)CO₂释放速率的日变化主要受地表温度和5cm地温制约,季节动态与5cm地温呈显著正相关关系(P<0.01),本研究为进一步进行高寒退化草甸生态系统源江效应的准确估测提供科学依据。

关键词: CO₂释放速率, 高寒退化草甸系统, 日动态, 季节动态

Abstract: The CO₂ emission rate from degraded alpine meadow in the source region of Yellow River in Guo-luo, Qing-hai Province was studied using static chamber-GC method. The results indicate that CO₂ emission rate from non-degraded meadow, minor degraded meadow, medium degraded meadow, and heavily degraded meadow showed evident characteristics of daily variations, e.g. peaked at 15:00-17:00 and minimized at 7:00-9:00, with higher CO₂ emission rate at daytime than at night. Furthermore, the CO₂ emission also showed a seasonal variation with higher emission rate during the plant growing seasons than at the wilting period. The fastigium of CO₂ emission appeared in August and low in January and February. In addition, the daily variations of CO₂ emission rate were restricted by soil temperature at 5cm depth and soil surface temperature, and a significant correlation was detected between the seasonal dynamics of CO₂ emission rate and soil temperature at 5cm depth (P<0.01).

Key words: CO₂ emission rate, Degraded alpine meadow ecosystem, Daily variation, Seasonal change

中图分类号:

Q948.1

孙步功, 龙瑞军, 孔郑, 冯瑞章. 青海果洛黄河源区高寒草甸CO₂释放速率研究[J]. , 2007, 15(5): 449-453.

SUN Bu-gong, LONG Rui-jun, KONG Zheng, FENG Rui-zhang. A Study on CO₂ Emission Rate from Alpine Meadow in the Source Region of Yellow River in Guo-luo, Qing-hai Province[J]. , 2007, 15(5): 449-453.

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参考文献

[1] Houghton J H,Meira L G,Bruce J.Climate Change 1994[M].Great Britain:Cambridge University Press,1995.163-176
[2] Ouyang Y,Boersma L.Dynamic oxygen and carbon dioxide exchange between soil and atmosphere model development[J].Soil Sci.,1992,56:1695-1702
[3] 于贵瑞.全球变化与陆地生态系统碳循环和碳蓄积[M].北京:气象出版社,2003.180-201
[4] Ojima D S,Parton W J,Schimel D S,et al.Modeling the effects of climate and CO₂ changes on grassland storage of soil C[J].Water Air Soil Pollution,1993,70:643-657
[5] 赵亮,徐世晓,伏玉玲,等.积雪对藏北高寒草甸CO₂和水汽通量的影响[J].草地学报,2005,13(3):242-247
[6] 周党卫,曹广民,张金霞,等.植物生长季退化草毡寒冻雏形土CO₂释放特征[J].应用生态学报,2003,14(3):367-371
[7] 李东,曹广民,胡启武,等.高寒灌丛草甸生态系统CO₂释放的初步研究[J].草地学报,2005,13(2):145-149
[8] 张金霞,曹广民,周党卫,等.放牧强度对高寒退化草甸土壤CO₂释放速率的影响[J].草地学报,2001,9(3):183-190
[9] Cao G M,Tang Y H,Mo W H,et al.Grazing intensity alters soil respiration in an alpine meadow on the Tibetan Plateau[J].Soil Biology and Biochemistry,2004,36:237-243
[10] Janzen H H,Campbell C A,Izaurralde R C,et al.Management effects on soil C storage on the Canadian prairies[J].Soil and Tillage Research,1998,47:181-195
[11] 李东,曹广民,吴琴,等.海北高寒灌丛草甸生态系统CO₂释放速率的季节变化规律[J].草业科学,2005,22(5):4-9
[12] 杜睿,王庚辰,吕达仁,等.静态箱法原位观测草原CO₂通量的探讨[J].大气科学,2001,25(1):61-70
[13] 张金霞,曹广民,周党卫.草毡寒冻雏形土CO₂ 释放特征[J].生态学报,2001,21(4):544-549
[14] Sims P L,Bradford J A.Carbon dioxide fluxes in a southern plains prairie[J].Agricultural and Forest Meteorology,2001,109:117-134
[15] 裴志永,欧阳华,周才平.青藏高原高寒草原碳排放及其迁移过程研究[J].生态学报,2003,23(2):231-236
[16] Gu S,Tang Y H,Du M Y,et al.Short-term variation of CO₂ flux in relation to environmental controls in an alpine meadow on the Qinghai-Tibetan Plateau[J].Journal of Geophysical Research,2004,108:4670-4679

青海果洛黄河源区高寒草甸CO₂释放速率研究

A Study on CO₂ Emission Rate from Alpine Meadow in the Source Region of Yellow River in Guo-luo, Qing-hai Province

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