干旱区生态环境知识资源中心(Arid): 塔克拉玛干沙漠腹地冬季土壤呼吸及其驱动因子

Arid

	塔克拉玛干沙漠腹地冬季土壤呼吸及其驱动因子
其他题名	Environmental factors driving winter soil respiration in the hinterland of the Taklimakan Desert, China
	刘跃辉 1; 艾力·买买提依明 2; 杨帆 2; 杨兴华 2; 何清 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2015
卷号	35 期号:20 页码:6711-6719
中文摘要	利用Li-8150系统测定了塔克拉玛干沙漠腹地冬季(1月)土壤呼吸,分析了环境驱动因子对极端干旱区荒漠生态系统土壤呼吸的影响。结果表明:(1)冬季土壤呼吸日变化呈现出显著的单峰曲线,土壤呼吸速率最大值出现在12:00,为0.0684mumol CO_2 m~(-2) s~(-1),凌晨04:00附近出现最小值,为-0.0473mumol CO_2 m~(-2) s~(-1);(2)土壤呼吸速率与各层气温,0cm地表温度均存在着极其显著或显著的线性关系,且都具有正相关性;(3)土壤呼吸速率与5cm土壤湿度存在着较为明显的线性关系,该层湿度能够解释土壤呼吸的69.5%;(4)0cm地表温度对土壤呼吸贡献最大,其次是5cm土壤湿度;(5)以Ocm地表温度、5cm土壤湿度为变量,通过多元回归分析表明:土壤温度-湿度构成的多变量模型能够解释大于86.9%的土壤呼吸变化情况;(6)研究时段内土壤呼吸速率的平均值是-1.45mg CO_2 m~(-2) h~(-1)。
英文摘要	In order to analyze the environmental drivers of soil respiration in an extreme arid desert ecosystem,we measured diurnal variation in winter soil respiration at Tazhong, a hinterland of Taklimakan Desert in northwest China. Regression analysis was performed with SPSS 21.0. We observed that:(1) Diurnal variation in winter soil respiration showed a single peak at 12:00 noon (local time), after which soil respiration began to decrease, reaching a minimum value at around 4:00 a.m. (2) Soil respiration and the air temperature at each height tested (0.5 m, 2 m) were significantly and positively correlated. Air temperature at 2 m was able to explain 67.8% of the diurnal variation in soil respiration. (3) Soil temperature at 0 cm, modeled by linear equations, was able to explain 86.3% of the diurnal variation in soil respiration, demonstrating that this process is more sensitive to temperature at 0 cm than at any other soil layer (10 cm, 20 cm, 40 cm). (4) Soil respiration exhibited a positive linear correlation with soil moisture at a depth of 5 cm. When linear regression analysis was used to model the relationship between these variables, the fitted linear model explained 69.5% of the diurnal variation in soil respiration, demonstrating that, in the extreme arid desert ecosystem, this shallow layer of moisture exerts a large effect on soil respiration. (5) The greatest contributors to soil respiration were soil temperature at a depth of 0 cm, followed by soil moisture at 5 cm. (6) Multiple regression analyses showed that a multi-variable model of temperature and soil moisture explains 86.9% of the diurnal variation in soil respiration,which is not significantly better than a single-variable model. (7) For winter soil respiration, the daily average rate of CO_2 absorption was -1.45mg CO_2 m~(-2) h~(-1).
中文关键词	塔克拉玛干沙漠 ; 土壤呼吸 ; 温度 ; 土壤湿度
英文关键词	Taklimakan desert soil respiration temperature soil moisture
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5552593
来源机构	新疆大学 ; 中国气象局乌鲁木齐沙漠气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233208
作者单位	1.新疆大学,资源与环境科学学院, 乌鲁木齐, 新疆 830046, 中国; 2.中国气象局乌鲁木齐沙漠气象研究所, 乌鲁木齐, 新疆 830002, 中国
推荐引用方式 GB/T 7714	刘跃辉,艾力·买买提依明,杨帆,等. 塔克拉玛干沙漠腹地冬季土壤呼吸及其驱动因子[J]. 新疆大学, 中国气象局乌鲁木齐沙漠气象研究所,2015,35(20):6711-6719.
APA	刘跃辉,艾力·买买提依明,杨帆,杨兴华,&何清.(2015).塔克拉玛干沙漠腹地冬季土壤呼吸及其驱动因子.生态学报,35(20),6711-6719.
MLA	刘跃辉,et al."塔克拉玛干沙漠腹地冬季土壤呼吸及其驱动因子".生态学报 35.20(2015):6711-6719.