干旱区生态环境知识资源中心(Arid): 荒漠草原区人工柠条林土壤水分周年动态变化

Arid

	荒漠草原区人工柠条林土壤水分周年动态变化
其他题名	Monthly variation in soil moisture under Caragana intermedia stands grown in desert steppe
	宋乃平; 杨明秀; 王磊; 王兴; 肖绪培; 曲文杰
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2014
卷号	33 期号:10 页码:2618-2624
中文摘要	水分承载力是干旱半干旱区植被重建的重大科学问题之一。在9、16、26年生人工柠条林和天然草地(对照)各选择3个重复样地,在其中1个样地中心埋设300 cm深的土壤水分探管,从2012年4月15日11月15日,用德国IMKO公司生产的TRIME /T3型TDR按每20 cm分层每半月测定一次;基于研究区人工柠条林土壤水分动态周年监测得出的土壤水分变化时间节点,分别在2012年4月底、8月底、10月初、次年3月初和4月底,采用土钻-烘干法对9、16、26年生人工柠条林和天然草地(对照)3个重复样地0~200 cm土壤水分进行监测。结果表明:(1)人工柠条林和草地的土壤水分的周年节律相同,58月为严重失水期,9月是蓄水期,10月至次年2月属于微弱失水期,34月失水量开始加速。(2)草地与人工柠条林之间的土壤水分差异并不显著,人工柠条林各林龄之间的土壤水分差异显著。(3)各种植被的土壤水分周年闭合差均出现亏缺。26年生柠条林的土壤水分亏缺最小,反映了其自我调整、适应环境、寻求新平衡的过程。(4)荒漠草原区土壤水分主要受降水分配、土壤性状等环境因子和植物根系分布显著影响,环境因子在土壤水分中的主导作用更明显。
英文摘要	Caragana shrub has been widely planted to prevent ecological deterioration in desert steppe.However,water capacity is the most important factor limiting the development of Caragana in this area.Annual variations of soil moisture in Caragana stands with different ages (9,16 and 26 years old) and natural grassland in April,August,October in 2012 and March,April in 2013 were studied.The results showed that: (1) Similar soil moisture dynamic pattern was observed in the different Caragana stands in an annual cycle.Soil moisture was dramatically depleted from May to August and recovered in September.Soil water underwent slight depletion from October in 2012 to February in 2013.The depleting process of soil moisture was accelerated from March to April.(2) There was no significant difference in soil moisture between grassland and Caragana stands,while a significant difference in soil moisture was found between the Caragana stands with different ages.(3) The annual closure errors of soil moisture for the different Caragana stands were under deficit.The least soil water deficit was recorded for the 26-year-old Caragana stand,indicating its low water consumption and strong ability to keep soil water balance.(4) The precipitation distribution,soil texture and rooting character had profound effects on the soil moisture in desert steppe.
中文关键词	中间锦鸡儿 ; 土壤水分过程 ; 荒漠草原区
英文关键词	Caragana intermedia soil moisture process desert steppe
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:5265523
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231657
作者单位	宁夏大学, 西北土地退化与生态恢复国家重点实验室培育基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川, 宁夏 750021, 中国
推荐引用方式 GB/T 7714	宋乃平,杨明秀,王磊,等. 荒漠草原区人工柠条林土壤水分周年动态变化[J]. 宁夏大学,2014,33(10):2618-2624.
APA	宋乃平,杨明秀,王磊,王兴,肖绪培,&曲文杰.(2014).荒漠草原区人工柠条林土壤水分周年动态变化.生态学杂志,33(10),2618-2624.
MLA	宋乃平,et al."荒漠草原区人工柠条林土壤水分周年动态变化".生态学杂志 33.10(2014):2618-2624.