干旱区生态环境知识资源中心(Arid): 盐生荒漠土壤CO

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	盐生荒漠土壤CO_2通量及其环境影响因素
其他题名	Soil CO_2 flux and its environmental affecting factors in a saline desert
	马杰 1; 于丹丹 2; 郑新军 1
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2013
卷号	32 期号:10 页码:2532-2538
中文摘要	以古尔班通古特沙漠南缘原始盐生荒漠为对象,利用LI-8150多通道土壤CO_2通量系统对原始盐生荒漠多枝柽柳群落地表CO_2通量进行连续观测,探讨土壤CO_2通量的日、季变化及其环境影响因素。结果表明:1)在整个生长季内,盐生荒漠土壤CO_2通量呈现2种不同的日变化过程,一种为单峰型,另一种为双峰型,推断引起土壤CO_2通量日过程差异的主要原因是高温抑制了微生物的活性;2)土壤CO_2通量的季节变化不明显,尤其是当日过程为双峰型时,土壤CO_2通量基本在一个较稳定的区间(0.13~0.3 g C·m~(-2)·d~(-1))波动,伴随降雨事件的发生,土壤CO_2通量呈脉冲式增加;3)在整个降雨周期,土壤呼吸的日过程也呈现出双峰-单峰-双峰的变化过程。本研究表明,水分是盐生荒漠土壤CO_2通量的主要限制因子。
英文摘要	Taking the southern Gurbantunggut Desert in Xinjiang as the object, and by using LI-8150 multi-channel soil CO_2 flux system, a continuous measurement of surface soil CO_2 flux under Tamarix ramosissima population in an original saline desert was conducted during growth season, with the diurnal and seasonal variations of the CO_2 flux and related environmental affecting factors analyzed. During the whole growth season of the population, the diurnal variation of the CO_2 flux presented two distinct patterns, one was single-peaked, and the other was bimodal. The difference in the diurnal variation of the CO_2 flux could be mainly caused by the inhibition of soil microbial activity by high temperature. The seasonal variation of the CO_2 flux was not apparent, being fluctuated within a stable range (0.13-0.3 g C·m~(-2)·d~(-1)) especially when the diurnal variation was bimodal. When rainfall events happened, the CO_2 flux increased in impulse type. During the rainfall cycle, the diurnal CO_2 flux varied in bimodal-single-peaked-bimodal type. Soil moisture content was the main factor limiting the soil CO_2 flux in the saline desert.
中文关键词	盐生荒漠 ; 土壤CO_2通量 ; 降雨 ; 日变化 ; 季节变化
英文关键词	saline desert soil CO_2 flux precipitation diurnal variation seasonal variation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FISHERIES
WOS研究方向	Fisheries
CSCD记录号	CSCD:4953296
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230070
作者单位	1.中国科学院新疆生态与地理研究所, 荒漠与绿洲国家重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院大学, 北京 100049, 中国
推荐引用方式 GB/T 7714	马杰,于丹丹,郑新军. 盐生荒漠土壤CO_2通量及其环境影响因素[J]. 中国科学院新疆生态与地理研究所,2013,32(10):2532-2538.
APA	马杰,于丹丹,&郑新军.(2013).盐生荒漠土壤CO_2通量及其环境影响因素.生态学杂志,32(10),2532-2538.
MLA	马杰,et al."盐生荒漠土壤CO_2通量及其环境影响因素".生态学杂志 32.10(2013):2532-2538.