|本期目录/Table of Contents|

典型草原恢复与退化群落土壤呼吸的特征研究(PDF)

《内蒙古大学学报(自然科学版)》[ISSN:1000-9035/CN:22-1262/O4]

期数:
2015年06期
页码:
600-608
栏目:
研究论文
出版日期:
2015-11-20

文章信息/Info

Title:
Characteristics of Soil Respiration in Recovered and Degraded Communities in Typical Steppe
作者:
王慧清12 王常顺23 梁存柱2 王炜2 王立新2
1. 呼伦贝尔市气象局, 内蒙古呼伦贝尔 021000;
2. 内蒙古大学生命科学学院, 中美生态、能源及可持续性科学内蒙古研究中心, 呼和浩特 010021;
3. 呼伦贝尔学院科研处, 内蒙古呼伦贝尔 021008
Author(s):
WANG Hui-qing12 WANG Chang-shun23 LIANG Cun-zhu2 WANG Wei2 WANG Li-xin2
1. Hulunbeir Meteorological Bureau, Hulunbeir 021000, China;
2. College of Life Sciences, Inner Mongolia University;Sino-US Center for Conservation, Energy and Sustainability Science in Inner Mongolia(SUCCESS), Hohhot 010021, China;
3. Scientific Re
关键词:
生长季非生长季过渡放牧温度相关性
Keywords:
growing seasonnon-growing seasonovergrazingtemperature related
分类号:
Q149
DOI:
-
文献标识码:
-
摘要:
土壤呼吸是生态系统碳循环的重要组成部分,本研究针对内蒙古典型草原退化与恢复群落,测定了其在生长季和非生长季的土壤呼吸日动态变化.研究表明:退化群落平均土壤呼吸约是恢复群落的50%;非生长季CO2的排放速率最高约为生长季的10%.恢复群落土壤呼吸速率与温度呈显著正相关,与土表温度的相关性最高;退化群落的相似特征仅在非生长季出现.过度放牧导致的植被退化是土壤呼吸速率降低的原因.植被退化改变了群落土壤呼吸对环境变化的响应模式,影响非生长季土壤呼吸的因素及其权重与生长季相比发生明显变化.本研究对于了解土地利用变化对于碳释放的影响具有一定的科学意义,对天然草地可持续管理也有积极的意义.
Abstract:
Soil respiration is an important part of the ecosystem carbon cycle.In current study,the daily dynamics of soil respiration during the growing season and non-growing season in the degraded and recovered grassland communities in Inner Mongolia were measured.The results showed that:(1) the average soil respiration of degraded community was equal to 50% of the recovery community;(2) the CO2 emission rate in non-growing season was up to about 10% of the growing season;(3) in the growing season,a significant positive correlation between soil respiration and soil temperature exist in the recovered community,while no significant relationship was founded in degraded community;(4) vegetation degradation caused by overgrazing decreased the soil respiration rate and changed the response of soil respiration to environmental change;(5) the factors and their weights affecting soil respiration in non-growing season differed from the factors in growing season.This study highlights the important impact of land use mode on carbon emissions.

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备注/Memo

备注/Memo:
收稿日期:2013-04-02;改回日期:2015-08-18。
基金项目:国家自然科学基金项目(31160476;41261009);国家科技支撑计划项目(2011BAC02B03);科技部科技示范项目(2008BAD95B03)
作者简介:王慧清(1982-),女,内蒙古乌兰察布人,工程师,硕士.
通讯作者:梁存柱(1964-),男,内蒙古乌兰察布人,教授,博士.主要研究方向蒙古高原草原、荒漠及草原与荒漠区山地植被生态学与植物区系地理.E-mail:bilcz@imu.edu.cn.
更新日期/Last Update: 1900-01-01