干旱区生态环境知识资源中心(Arid): 小叶锦鸡儿灌丛对土壤水分下渗及优势流的影响

Arid

	小叶锦鸡儿灌丛对土壤水分下渗及优势流的影响
其他题名	nfluences of Soil Infiltration and Preferential Flow by Shrub Caragana microphylla
	李柳 1; 郑肖然 2; 李小雁 1; 张思毅 2
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2015
卷号	29 期号:2 页码:55-59,132
中文摘要	基于非积水条件下的染色示踪试验,对比分析了小叶锦鸡儿(Caragana microphylla)灌丛及其斑块间草地的土壤水分下渗差异。灌丛下最大下渗深度(14.672.08)~(37.002.82)cm比草地(10.00 1.00)~(32.001.41)cm更深,但二者间的平均入渗深度差别不大,表明当相同水量分别进入灌丛和草地土壤中时,其总的渲染范围差别不大,不同的是水分向下运移的路径。对灌丛进行地表刈割处理之后,灌丛与草地间的水分下渗差异仍然存在,这是由于灌丛通过根系网络及改变土壤渗透特性等作用促进了水分的下渗。自然组灌丛的最大下渗深度(14.672.08)~(19.673.06)cm高于刈割组灌丛(12.00 1.73)~(17.003.00)cm,说明保留灌丛地表部分有利于增加土壤水分最深入渗深度,这是由于地表灌丛对降雨的再分配作用改变了降雨达到地表时的空间分配。灌丛的优势流比大于草地的,该比值随着降雨量的增加而减小,表明水分在灌丛下入渗的比草地下更深,同时在自然降雨条件下水分在土壤中的运移以均匀下渗为主,优势流下渗为辅,这与在积水条件下进行的染色示踪试验结论有所差异。
英文摘要	Compared the different soil infiltration characteristics between shrubs and interspaces grass patches on the basis of a dye-traced experiment which had no surface water.The uniform infiltration depth(UID, cm),maximum infiltration depth(MID,cm),total stained area(TSA,cm~2),area per unit depth(AD,%) and the ratio of preferential flow(RFL,100%)were calculated by processing dye-stained photos.The MID under shrub was(14.672.08)to(37.002.82)cm deeper than the MID under grass was (10.001.00) to(32.001.41)cm. However, the UID under shrub was(6.501.22)to(20.523.54)cm,it had no significant difference with the UID under grass(5.020.80)to(20.703.10)cm.It meant that when the same volume of water infiltrate into the soil under shrub and grass,the differences between the migration pathway instead of the stained area.After cutting the canopy over the soil surface,the differences between the infiltration of shrub and grass were still exist,because it promoted the infiltration by root network and changed the soil permeability.The MID of shrub in nature group was(14.672.08)to(19.673.06)cm, deeper than the MID of shrub in reaped group(12.001.73) to (17.003.00)cm,showed that the canopy of shrub could promote the soil infiltration in consequence of rainfall redistribution of the canopy.The RFL of shrub was more than the RFL of grass and this ratio decreased with the increasing of rainfall,it implied that water could infiltrate to a deeper layer beneath shrub canopy than beneath grass patches,while it tended to going down as uniform infiltration comparing to the preferential flow under a natural rainfall condition, that was different with the results depend on dye-traced experiment which had water in the soil surface.
中文关键词	模拟降雨 ; 非饱和下渗 ; 刈割 ; 冠层截留 ; 干旱半干旱区
英文关键词	simulated rainfall unsaturated infiltration cutting off the canopy interception arid and semiarid region
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5416994
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233350
作者单位	1.北京师范大学资源学院, 地表过程与资源生态国家重点实验室, 北京 100875, 中国; 2.北京师范大学资源学院, 北京 100875, 中国
推荐引用方式 GB/T 7714	李柳,郑肖然,李小雁,等. 小叶锦鸡儿灌丛对土壤水分下渗及优势流的影响[J]. 北京师范大学,2015,29(2):55-59,132.
APA	李柳,郑肖然,李小雁,&张思毅.(2015).小叶锦鸡儿灌丛对土壤水分下渗及优势流的影响.水土保持学报,29(2),55-59,132.
MLA	李柳,et al."小叶锦鸡儿灌丛对土壤水分下渗及优势流的影响".水土保持学报 29.2(2015):55-59,132.