干旱区生态环境知识资源中心(Arid): 腾格里沙漠植被重建对土壤呼吸的影响

Arid

	腾格里沙漠植被重建对土壤呼吸的影响
其他题名	EFFECTS OF REVEGETATION ON SOIL RESPIRATION IN THE TENGGER DESERT
	高艳红; 张志山; 刘立超; 贾荣亮
ISSN	0564-3929
出版年	2009
卷号	46 期号:4 页码:626-633
中文摘要	植被重建是防止和控制沙漠化的有效措施之一.为探讨腾格里沙漠植被重建对土壤呼吸的影响,利用Li- 6400- 09土壤呼吸室于2007年观测了1989年建立的植被重建区和流沙区土壤呼吸差异,并采用根系隔离法区分了植被重建区的土壤基础呼吸和根际呼吸.结果表明,植被重建18a 显著影响了该区土壤CO_2的释放过程,总土壤呼吸速率由流沙区的CO_2 0.1070.008 mumol m~(-2)s~(-1)显著增加到植被区CO_2 0.483 0.033 mumol m~(-2)s~(-1),而且出现了较为明显的季节波动.植被重建不但导致根际呼吸速率增加,而且影响了土壤基础呼吸速率.此外,植被重建区灌木的缀块状分布格局和养分的空间异质性导致了土壤呼吸的空间差异.
英文摘要	Revegetation is one of the most effective means to prevent and control soil desertification. To investigate effects of revegetation on soil respiration in the Tengger Desert,the technique of Li-6400-09 soil respiration chamber was adopted in measuring soil respiration rates of an area revegetated in 1989 and a shifting sand area,and the root-partitioning techniques in separating rhizospheric respiration from soil basal respiration. Results show that soil CO_2 efflux was significantly affected by the vegetation restoration. The total soil respiration rate was found be significantly increased from 0.1070.008 mumol m~(-2)s~(-1) to 0.483 0.033 mumol m~(-2)s~(-1) and obvious seasonal fluctuation of the rate was observed. The revegetation not only greatly enhanced rhizospheric respiration rate,but also dramatically increased basal respiration rate through improving soil surface environment,capturing dust,and developing cryptogamic crusts. Furthermore,the patchy distribution of shrubs and spatial heterogeneity of soil nutrients in the revegetated area led to spatial heterogeneity of the soil respiration therein .
中文关键词	腾格里沙漠 ; 植被重建 ; 土壤呼吸 ; 土壤基础呼吸 ; 根际呼吸
英文关键词	Tengger Desert Revegetation Soil respiration Soil basal respiration Rhizospheric respiration
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3695634
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224283
作者单位	中国科学院寒区旱区环境与工程研究所沙坡头沙漠研究试验站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	高艳红,张志山,刘立超,等. 腾格里沙漠植被重建对土壤呼吸的影响[J]. 中国科学院西北生态环境资源研究院,2009,46(4):626-633.
APA	高艳红,张志山,刘立超,&贾荣亮.(2009).腾格里沙漠植被重建对土壤呼吸的影响.,46(4),626-633.
MLA	高艳红,et al."腾格里沙漠植被重建对土壤呼吸的影响".46.4(2009):626-633.