干旱区生态环境知识资源中心(Arid): 荒漠草原不同类型土壤水分时空变化特征

Arid

	荒漠草原不同类型土壤水分时空变化特征
其他题名	Spatiotemporal Variation of Moisture Content of Different Soil Types in Desert Steppe
	苏莹; 陈林; 李月飞; 杨新国; 张义凡; 杨东东; 朱林
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2018
卷号	35 期号:6 页码:1308-1316
中文摘要	为研究荒漠草原区不同土壤类型的水分时空动态变化特征及其对降雨变化的响应。选择3种土壤类型风沙土、风化基岩残积土和灰钙土,利用野外增减雨试验装置,对土壤水分进行长期的动态监测。结果表明:风沙土、风化基岩残积土和灰钙土的土壤体积含水率时间变化受降雨的影响显著,出现了3次波峰;降雨量的增减变化会影响波峰出现的早晚。土壤体积含水率的垂直变化主要有2种类型:波动型和降低型,其主要受地表植被及土壤物理性质的影响。风沙土和风化基岩残积土的正常和减雨区,变异系数由表层(活跃层)向深层递减;灰钙土表层的土壤体积含水率变异系数最小(正常区1.21%,增雨区1.36%,减雨区1.46%),属次活跃层。正常和增雨区的总土壤蓄水量表现为:风化基岩残积土>风沙土>灰钙土,而减雨区的总蓄水量为:风化基岩残积土>灰钙土>风沙土。
英文摘要	Three soil types including sandy soil,residual soil of weathered bedrock and sierozem were used to equip a device of controlling rainfall,record soil moisture content by an installed American HOBOU 30,and monitor the long-term dynamic change of soil moisture content.The purposes of this study were to research the spatial and temporal dynamic changes of moisture content of different soil types in desert steppe and its response to precipitation variation.The results showed that the temporal variation of volumetric moisture content of sand soil,residual soil of weathered bedrock and sierozem were affected by rainfall,and three peak values occurred.Rainfall change affected the peak values to appear sooner or later.There were two major types of vertical change of soil volumetric moisture content,i.e.the fluctuation type and reduction type.They were mainly affected by surface vegetation and soil physical properties.The variation coefficients under the normal situation and the rain-reduced treatment of sandy soil and residual soil of weathered bedrock were decreased from the surface to the deeper layer.The variation coefficients of volumetric moisture content of sierozem were 1.21%,1.36% and 1.46% under the normal situation,rain-increased treatment and rain-reduced treatment respectively.Under the normal situation and rain-increased treatment,the total soil water storage was in an order of residual soil of weathered bedrock > sandy soil > sierozem;under the rain-reduced treatment,however,it was in an order of residual soil of weathered bedrock > sierozem> sandy soil.
中文关键词	荒漠草原 ; 土壤水分 ; 降雨变化 ; 土壤类型 ; 宁夏
英文关键词	desert steppe soil moisture content precipitation variation soil type Ningxia
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:6372454
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/2XILL650/237687
作者单位	宁夏大学;;宁夏大学;;宁夏大学西部生态与生物资源开发联合研究中心, 西北退化生态系统恢复与重建教育部重点实验室;;西北土地退化与生态恢复宁夏省部共建国家重点实验室培育基地;;, 银川;;银川;;银川, 宁夏;;宁夏;;宁夏 750021;;750021;;750021, 中国
推荐引用方式 GB/T 7714	苏莹,陈林,李月飞,等. 荒漠草原不同类型土壤水分时空变化特征[J]. 宁夏大学,2018,35(6):1308-1316.
APA	苏莹.,陈林.,李月飞.,杨新国.,张义凡.,...&朱林.(2018).荒漠草原不同类型土壤水分时空变化特征.干旱区研究,35(6),1308-1316.
MLA	苏莹,et al."荒漠草原不同类型土壤水分时空变化特征".干旱区研究 35.6(2018):1308-1316.