干旱区生态环境知识资源中心(Arid): 荒漠草原区不同土地利用方式下土壤水分相对亏缺

Arid

	荒漠草原区不同土地利用方式下土壤水分相对亏缺
其他题名	Soil Water Deficit Under Different Land-use Type in Desert Steppe
	卞莹莹 1; 宋乃平2 ; 王兴 2; 肖旭培 2
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2015
卷号	29 期号:1 页码:201-206,213
中文摘要	以典型荒漠草原区(宁夏盐池县柳杨堡乡杨寨子村)作为研究对象,采用土壤水分相对亏缺指数(CSWDI)、样地土壤水分相对亏缺指数(PCSWDI)、土壤有效储水量(ESWS)、土壤水分相对亏缺量(DSWS)、变异系数(CV)5个指标来衡量旱地、天然草地、柠条林地3种土地利用方式下土壤水分的亏缺程度。研究结果表明:(1)旱地、天然草地、柠条林地的土壤储水量和土壤有效储水量与降雨量的变化趋势相同。且降雨对剖面土壤水分的影响程度随土层深度的增加而减弱。(2)土壤水分亏缺状况表现为旱地>柠条林地>天然草地。天然草地土壤水分不亏缺,旱地、柠条林地土壤水分呈亏缺状态。(3)天然草地土壤水分蓄积效应最强,土壤水分亏缺主要集中在表层。旱地土层越深土壤水分越亏缺土壤水分亏缺。柠条林地0-100 cm土层土壤水分不亏缺,100-200 cm土层土壤水分亏缺。(4)旱地、天然草地、柠条林地土壤水分剖面变化分别呈现波动型、增长型和稳定型。
英文摘要	Soil water,the effective water source for plant growth,has become a key limiting factor in vegetation restoration and ecological reconstruction in Chinas desert steppe,because of the semi-arid climate and water scarcity.However,without an appropriate scientific guidance,revegetation and cultivation may result in excessive water consumption and soil water deficit in different soil layers,which in turn restrict significantly the local ecological restoration and environmental enhancement.Based on local rainfall and soil water condition, quantitative evaluation of soil water deficit and its profile distribution is the premise and foundation for proper vegetation restoration and sustainable ecological development in desert steppe,and there is one of the top research priorities at present with both theatrical and practical significance.In this study,we selected a typical desert steppe area located in the Yangzhaizi village,Yanchi county,Ningxia province of China,to qutantify the response of soil water deficit under different land-use type.Soil water under natural grassland, drylands and Caragana korshinskii forest were analyzed on field sampling and laboratory test.For comparision, the background soil water content was set to the value of natural grassland which was banned grazing for a long period.Then,compared soil water deficit index(CSWDI),plot compared soil water deficit index(PCSWDI),effective soil water storage(ESWS),deficient soil water storage(DSWS),coefficient of variation were calculated and analyzed to quantify soil water deficit degree and its profile distribution under different land-use type.The results showed:(1)Compared with natural grassland,the soil water under different land-use type in desert steppe was deficited.From June to October,the variation tendency of soil water storage and effective soil water storage under different land-use type were the same.And the rainfall was vail supply to soil water.(2)When the soil layer water storage of drylands from 0 to 200 cm was deficit,CSWDI value range was from 3.21 to 5.57.And the serious deficient soil layer was 180 cm to 200 cm,the second soil layer was 40 cm to 60 cm.The soil layer water storage of natural grassland from 0 to 200 cm was sufficient, and the soil CSWDI value were fluctuate changing along with the changing of months.The relative soil water deficient condition of Caragana korshinskii forest was between dryland and natrual grassland.The soil water deficiency of Caragana korshinskii forest from 120 cm to 140 cm was worse than other soil layers.(3)Dryland soil water deficient condition was in a serious condition.The average PCSWDI value from 0 to 100 cm soil layer was 2.05,and the value from 100 cm to 200 cm was 7.2.From May to September,the natural grassland soil water deficiency was mainly focused on the surface.Soil moisture was abundant as soil was deepened.Compared with natural grassland,the condition of Caragana korshinskii forests soil water just the opposite.(4)The variability of dryland from 100 cm to 180 cm soil layer belonged to strong variability with CVbeing 1.03 to 1.71,and other soil layers water variability were moderate variability.
中文关键词	荒漠草原区 ; 土地利用方式 ; 土壤水分亏缺
英文关键词	desert steppe land-use type soil water deficit
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:5359485
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/2XILL650/233344
作者单位	1.宁夏大学农学院, 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; 2.宁夏大学, 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	卞莹莹,宋乃平,王兴,等. 荒漠草原区不同土地利用方式下土壤水分相对亏缺[J]. 宁夏大学,2015,29(1):201-206,213.
APA	卞莹莹,宋乃平,王兴,&肖旭培.(2015).荒漠草原区不同土地利用方式下土壤水分相对亏缺.水土保持学报,29(1),201-206,213.
MLA	卞莹莹,et al."荒漠草原区不同土地利用方式下土壤水分相对亏缺".水土保持学报 29.1(2015):201-206,213.