干旱区生态环境知识资源中心(Arid): 拉萨半干旱河谷宜林地土壤水分时空分布格局

Arid

	拉萨半干旱河谷宜林地土壤水分时空分布格局
其他题名	Distribution pattern of soil moisture space-time of forestland in semi-arid valley of Lhasa, southwestern China
	邱邦桂; 李永霞; 杨小林; 马和平
来源期刊	北京林业大学学报
ISSN	1000-1522
出版年	2016
卷号	38 期号:11 页码:9-15
中文摘要	土壤水分是植被恢复的主要限制因子之一。本文选择拉萨半干旱河谷宜林地7个典型立地类型0~20 cm,20~40 cm,40~60 cm深度的土壤为研究对象,研究其土壤水分的变化规律,探讨拉萨半干旱河谷地区土壤水分时空分布格局。研究结果表明:不同立地类型的土壤水分变化走势大致相同,呈单峰状分布,土壤最低含水量与最高含水量分别出现在1月和8月,其变化范围在2.43%~30.03%之间;土壤含水量由高到低排序为:河滩地高水位>阴坡上部>阴坡下部>河滩地低水位>阳坡上部>阶地>阳坡下部;土壤水分时间格局总体上分为土壤水分积累期(6-9月)、土壤水分消耗期(10月至翌年1月)、土壤水分稳定期(2-5月)3个时期,土壤水分空间分布分为土壤水分速变层(0~20 cm)、土壤水分活跃层(20~40 cm)及土壤水分相对稳定层(40~60 cm)3层。本研究对该区植被建设具有一定的指导意义。
英文摘要	Soil moisture is one of the main limiting factors of vegetation restoration. As the research objects of seven typical site types which belong to the layers of 0-20 cm, 20-40 cm, 40-60 cm depth soil, the paper studies the change and pattern of space-time distribution of soil moisture in semi-arid valley of Lhasa, southwestern China. The results showed that the soil moisture changing trends of different site types were roughly same and the shape was unimodal distribution. The minimum and maximum water content occurred in January and August respectively, and its range was between 2.43%-30.03%. The order of soil water content from high to low was as follows: high water level of flood land > upper part of shady slope>lower part of shady slope> low water level of flood land> upper part of sunny slope> terrace> lower part of sunny slope. The time spatial pattern of soil moisture could be divided into three periods, ie soil water accumulation period (from June to September), soil water consumption period (from October to the January of next year) and soil water stationary period(from February to May). The space distribution of soil moisture could be divided into three layers, ie soil water comported layer (0-20 cm), soil water active layer (20-40 cm) and soil water relatively stable layer (40-60 cm). This conclusion has a certain guiding significance for the vegetation construction in this area.
中文关键词	拉萨 ; 半干旱河谷 ; 土壤水分 ; 分布格局
英文关键词	Lhasa semi-arid valley soil moisture distribution pattern
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY ; FORESTRY
WOS研究方向	Agriculture ; Forestry
CSCD记录号	CSCD:5854592
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233911
作者单位	西藏农牧学院
推荐引用方式 GB/T 7714	邱邦桂,李永霞,杨小林,等. 拉萨半干旱河谷宜林地土壤水分时空分布格局[J],2016,38(11):9-15.
APA	邱邦桂,李永霞,杨小林,&马和平.(2016).拉萨半干旱河谷宜林地土壤水分时空分布格局.北京林业大学学报,38(11),9-15.
MLA	邱邦桂,et al."拉萨半干旱河谷宜林地土壤水分时空分布格局".北京林业大学学报 38.11(2016):9-15.