globalchange  > 气候变化与战略
CSCD记录号: CSCD:5807102
论文题名:
模拟气候变暖和林内穿透雨减少对干旱年暖温带锐齿栎林土壤呼吸的影响
其他题名: Response of Soil Respiration to Soil Warming and Throughfall Exclusion in Warm-temperate Oak Forest in Drought Year
作者: 王一; 刘彦春; 刘世荣; 陆海波
刊名: 林业科学研究
ISSN: 1001-1498
出版年: 2016
卷: 29, 期:5, 页码:2247-2261
语种: 中文
中文关键词: 暖温带 ; 锐齿栎林 ; 土壤呼吸速率 ; 增温 ; 减雨
英文关键词: warm-temperate zone ; Quercus aliena var. acuteserrata ; soil respiration ; warming ; drought
WOS学科分类: FORESTRY
WOS研究方向: Forestry
中文摘要: [目的]研究土壤呼吸对气候变暖和干旱的响应,阐明全球气候变化与土壤碳排放之间的反馈关系。[方法]采用红外辐射增温和林内穿透雨减少技术模拟气候变暖和干旱,通过LI-8100土壤CO_2通量测定系统对生长季土壤呼吸速率进行观测,分析了干旱年不同处理(对照、增温+减雨、增温、减雨)对土壤呼吸速率的影响。[结果]显示:生长季,以上4种处理的土壤呼吸速率分别为1.78、1.84、2.02和2.01 mumol ? m~(-2) ? s~(-1), 5 cm土壤温度和土壤湿度分别可以解释土壤呼吸速率变异的68.2%?87.5%和51.0%?66.6%。干旱期,以上4种处理的土壤呼吸速率均低于生长季,增温处理降低了土壤呼吸速率与土壤温度的相关性,但增加了土壤呼吸速率与土壤湿度的相关性。[结论]干旱年内,土壤温度和湿度是影响该区土壤呼吸速率的主要环境因子,干旱期增温处理引起土壤湿度对土壤呼吸的限制作用削弱了气候变暖与土壤碳排放之间的正反馈作用。
英文摘要: [ Objective ] To explore the response of soil respiration to climate warming and drought and address the feedbacks between climate change and soil carbon flux. [ Method ] Infrared radiation heater and throughfall exclusion were conducted to simulate warming and drought in Warm-temperate oak (Quercus aliena var. acuteserrata) forest soil. The soil respiration was measured in drought year to analyze the effect of the Control, Warming + Drought, and Warming and Drought treatments on soil respiration in growing season by using LI-8100 system. [ Result ]The result showed that: the soil respiration of 4 treatments were 1.78 mumol CO_2m~(-2)s~(-1),1.84 mumol CO_2m~(-2) s~(-1), 2.02 mumol CO_2m~(-2)s~(-1) and 2.01 mumol CO_2m~(-2)s~(-1),the soil temperature and soil moisture respectively explained 68.2% ?87.5% and 51.0%?66.6% of the temporal variation of soil respiration. The soil respiration in drought season was lower than that in growing season. The correlation coefficient (soil respiration vs. soil temperature)decreased in warming treatment in drought season,but increased in the relationship of soil respiration and soil moisture. [ Conclusion ] Soil temperature and moisture are the main factors in regulating soil respiration in drought year,and the limited effect of soil moisture to soil respiration,which is induced by warming treatment,will mitigate the positive feedbacks between soil carbon flux and climate warming in drought season.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/151092
Appears in Collections:气候变化与战略

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作者单位: 中国林业科学研究院森林生态环境与保护研究所, 国家林业局森林生态环境重点实验室, 北京 100091, 中国

Recommended Citation:
王一,刘彦春,刘世荣,等. 模拟气候变暖和林内穿透雨减少对干旱年暖温带锐齿栎林土壤呼吸的影响[J]. 林业科学研究,2016-01-01,29(5):2247-2261
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