干旱区生态环境知识资源中心(Arid): 荒漠灌丛树干茎流及其入渗、再分配特征

Arid

	荒漠灌丛树干茎流及其入渗、再分配特征
其他题名	Stemflow of Caragana korshinskii and its Infiltration and Redistribution in Desert Environment
	王正宁; 王新平
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2010
卷号	30 期号:5 页码:1108-1113
中文摘要	运用铝箔收集法测定了荒漠灌木柠条(Caragana korshinskii Kom.)树干茎流;利用时域反射仪连续测量土壤剖面水分含量,分析树干茎流影响下柠条根际区水分入渗与再分配过程. 结果表明,柠条灌丛产生树干茎流需要2.2mm的前期降雨量,树干茎流占降雨量的7.9%,平均汇流率是89.8. 土壤表层含水率对降雨过程响应明显;当降雨量达到6mm时,树干茎流有利于增加根际区土壤水分增量,补充深层土壤水分,对荒漠植被在干旱条件下存活起着重要作用
英文摘要	Stemflow is important in sustaining the stabilization of desert ecosystems, where precipitation is the critical source of water replenishment. Stemflow of Cgragana korshinskii, a kind of xerophytic shrub, was collected by aluminum foil collar at the re-vegetated sand dunes in the Shapotou desert ecosystem of the northwestern China. The 20 probes of Time Domain Reflectometry (TDR) were inserted horizontally into the soil profile near C. korshinskii root at different depths to record volumetric soil moisture by hourly intervals. Stemflow of C. korshinskit, expressed as an equivalent water depth per unit projected crown area, was averaged by 7.9 % of the gross precipitation and the average funnelling ratio was 89.8. Amount of 2. 2 mm precipitation was necessary for the generation of the stemflow of C. korshinskii. The surface soil moisture was strongly correlated with individual rainfall. Stemflow was helpful to increase the soil moisture increment around the root area and replenish the deeper soil layers moisture only when rainfall reached 6 mm. The water infiltrated to the deeper soil layer played an important role in plant surviving in the arid environment
中文关键词	柠条 ; 汇流率 ; 湿润锋 ; 土壤水分增量
英文关键词	Caragana korshinskii funnelling ratio wetting front soil moisture increment
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:3981736
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/2XILL650/226026
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试验研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	王正宁,王新平. 荒漠灌丛树干茎流及其入渗、再分配特征[J]. 中国科学院西北生态环境资源研究院,2010,30(5):1108-1113.
APA	王正宁,&王新平.(2010).荒漠灌丛树干茎流及其入渗、再分配特征.中国沙漠,30(5),1108-1113.
MLA	王正宁,et al."荒漠灌丛树干茎流及其入渗、再分配特征".中国沙漠 30.5(2010):1108-1113.