准噶尔盆地南缘梭梭群落春季融雪期的土壤呼吸动态

干旱区研究 ›› 2013, Vol. 30 ›› Issue (3): 430-437.

准噶尔盆地南缘梭梭群落春季融雪期的土壤呼吸动态

谢继萍^1,2,3, 钟文昭⁴, 黄刚^1,3, 李彦^1,3, 吴林峰^1,3

1. 中国科学院新疆生态与地理研究所，荒漠与绿洲生态国家重点实验室，新疆乌鲁木齐 830011；
2. 中国科学院研究生院，北京 100049； 3. 中国科学院阜康荒漠生态系统研究站，新疆阜康 831500；
4. 新疆生产建设兵团直属222团，新疆阜康 831500

收稿日期:2012-09-09 修回日期:2013-01-28 出版日期:2013-05-15 发布日期:2013-05-16
作者简介:谢继萍(1987-)，女，在读硕士研究生，研究方向为植物地理学.E-mail： xiemiao07@sina.com
基金资助:
国家重点基础研究发展计划资助(2009CB825102)；西部博士(XBBS201007)；自然基金(31000217)；中国科学院西部之光(XBBS201001

Dynamic Change of Soil Respiration in Haloxylon ammodendron Community in Southern Edge of Junggar Basin in Snowmelt Season

XIE Ji-Ping^1,2,3, ZHONG Wen-Zhao⁴, HUANG Gang^1,3, LI Yan^1,3, WU Lin-Feng^1,3

1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China;
3. Fukang Station for Desert Ecosystem Research, Chinese Academy of Sciences, Fukang 831500, Xinjiang, China;
4. The 222 Division, Xinjiang Corps of Production and Construction, Fukang 831500, Xinjiang, China

Received:2012-09-09 Revised:2013-01-28 Published:2013-05-15 Online:2013-05-16

摘要/Abstract

摘要： 积雪对温带中高纬度地区早春土壤温度和水分具有调控作用，并对土壤呼吸具有重要影响。利用箱式法观测2012年早春积雪融化阶段古尔班通古特沙漠南缘典型温带荒漠梭梭群落内土壤呼吸的动态变化。结果表明：春季融雪期梭梭群落土壤呼吸变异极大，变化范围为0.2~1.2 μmol•m-²•s^-1，日平均土壤呼吸速率变化呈先增后减趋势，但土壤最大呼吸速率随土壤含水量的减少而减少。融雪期灌丛内外土壤呼吸变化规律相同，梭梭灌丛内土壤呼吸速率显著高于灌丛外。融雪期土壤含水量与最大土壤呼吸具有显著的相关关系，但在日尺度上土壤温度与土壤呼吸具有显著的相关关系。研究表明：积雪融化对土壤呼吸具有显著的激发效应，早春积雪变化对土壤呼吸速率将产生重要影响。

关键词: 土壤呼吸, 融雪期, 梭梭群落, 土壤含水量, 春季, 准噶尔盆地

Abstract: Snowmelt affects highly the change of soil moisture content and temperature in topsoil in snow thawing season, and hence affects soil respiration in temperate arid land. In snow thawing season in early spring 2012, a carbon flux chamber was used to observe the dynamic change of soil respiration in Haloxylon ammodendron community in southern marginal zone of the Gurbantonggut Desert. The results showed that the variation of soil respiration rate was significant and ranged from 0.2 to 1.2 μmol•m^-2•s^-1. In snow thawing season, the mean soil respiration rate was increased at first and then decreased, and its maximum value was decreased with the decrease of soil moisture content. Soil respiration under bushwood was significantly higher than that out of the bushwood, and its variation under and out of the bushwood was similar. There was a significant correlation between soil moisture content and maximum soil respiration in snow thawing season, and also a significant correlation between soil temperature and soil respiration at daily scale. The study results revealed that there was a stimulating effect of snow thawing on soil respiration, and the change of snow cover in early spring affected significantly soil respiration in the Gurbantonggut Desert.

Key words: soil respiration, snowmelt season in spring, Haloxylon ammodendron community, soil moisture content, spring, Junggar Basin

谢继萍, 钟文昭, 黄刚, 李彦, 吴林峰. 准噶尔盆地南缘梭梭群落春季融雪期的土壤呼吸动态[J]. 干旱区研究, 2013, 30(3): 430-437.

XIE Ji-Ping, ZHONG Wen-Zhao, HUANG Gang, LI Yan, WU Lin-Feng. Dynamic Change of Soil Respiration in Haloxylon ammodendron Community in Southern Edge of Junggar Basin in Snowmelt Season[J]. , 2013, 30(3): 430-437.

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