Modeling Soil Respiration of Alpine Meadow on the Northern Tibet Plateau Using MODIS and Climate Data

doi:10.11733/j.issn.1007-0435.2011.03.007

Acta Agrestia Sinica ›› 2011, Vol. 19 ›› Issue (3): 400-405.DOI: 10.11733/j.issn.1007-0435.2011.03.007

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Modeling Soil Respiration of Alpine Meadow on the Northern Tibet Plateau Using MODIS and Climate Data

FU Gang^1,2, SHEN Zhen-xi¹, ZHANG Xian-zhou¹, SHI Pei-li¹, HE Yong-tao¹, WU Jian-shuang^1,2, ZHOU Yu-ting^1,2

1. Lhasa Plateau Ecosystem Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received:2010-05-21 Revised:2011-04-02 Online:2011-06-15 Published:2011-06-15

利用MODIS影像和气候数据模拟藏北高寒草甸的土壤呼吸

付刚^1,2, 沈振西¹, 张宪洲¹, 石培礼¹, 何永涛¹, 武建双^1,2, 周宇庭^1,2

1. 中国科学院地理科学与资源研究所, 生态系统网络观测与模拟重点实验室, 拉萨高原生态系统研究站, 北京, 100101;
2. 中国科学院研究生院, 北京, 100049

通讯作者: 沈振西,E-mail:shenzx@igsnrr.ac.cn
作者简介:付刚(1984- ),男,河北保定人,博士,研究方向为高原生态学、遥感应用,E-mail:fugang09@126.com
基金资助:
国家科技支撑计划项目(2007BAC06B01)(2006BAC01A04);国家自然基金项目(40771121)资助

Abstract

Abstract: The soil respiration,soil heterotrophic respiration and root respiration of alpine meadow in Damxung County were estimated by using MODIS land surface temperature and the equations between soil(heterotrophic) respiration and soil temperature during the growing season(from May to October).Results showed that the soil respiration,soil heterotrophic respiration and root respiration total amount were 1059.11,393.80 and 665.31 g CO₂·m^-2 during the growing season in 2004,respectively,while those were 1114.77,423.34 and 691.43 g CO₂·m^-2 during the growing season in 2005,respectively.Seasonal changes of soil respiration,soil heterotrophic respiration and root respiration were obvious: they increase rapidly in the beginning 153 day of year(DOY) and kept high level until 241 DOY then decrease dramatically.The ratio of root respiration to soil respiration ranged from 48% to 69% with seasonal changing.The Q₁₀ values of soil respiration and soil heterotrophic respiration ranged from 1.13 to 1.17 and from 1.12 to 1.27,respectively.This study may provide basis for scaling-up of soil respiration.

Key words: Soil respiration, Soil heterotrophic respiration, Root respiration, Q₁₀, MODIS, Northern Tibetan Plateau, Alpine meadow

摘要： 利用MODIS卫星的陆地表面温度数据,模拟了2004年和2005年生长季(5-10月)当雄县高寒草甸的土壤呼吸、土壤异养呼吸和根系呼吸,以期为土壤呼吸空间尺度扩展提供相应的基础。结果表明:2004年生长季的土壤呼吸、土壤异养呼吸和根系呼吸总量分别为1059.11,393.80,665.31 g CO₂·m^-2,而2005年生长季的则分别为1114.77,423.34,691.43 g CO₂·m^-2。土壤呼吸、土壤异养呼吸和根系呼吸都有着明显的季节变化,即第153 d前后开始迅速增加并保持较高水平,至第241 d左右开始迅速下降。根系呼吸占土壤呼吸的比例为48%~69%,并随着季节而发生变化。土壤呼吸和土壤异养呼吸的Q₁₀值范围分别是1.13~1.17和1.12~1.27。

关键词: 土壤呼吸, 土壤异养呼吸, 根系呼吸, Q₁₀, MODIS, 藏北高原, 高寒草甸

CLC Number:

TP79
S812

FU Gang, SHEN Zhen-xi, ZHANG Xian-zhou, SHI Pei-li, HE Yong-tao, WU Jian-shuang, ZHOU Yu-ting. Modeling Soil Respiration of Alpine Meadow on the Northern Tibet Plateau Using MODIS and Climate Data[J]. Acta Agrestia Sinica, 2011, 19(3): 400-405.

付刚, 沈振西, 张宪洲, 石培礼, 何永涛, 武建双, 周宇庭. 利用MODIS影像和气候数据模拟藏北高寒草甸的土壤呼吸[J]. 草地学报, 2011, 19(3): 400-405.

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Modeling Soil Respiration of Alpine Meadow on the Northern Tibet Plateau Using MODIS and Climate Data

利用MODIS影像和气候数据模拟藏北高寒草甸的土壤呼吸

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