干旱区生态环境知识资源中心(Arid): 油蒿灌丛群落浅层土壤水分对不同降雨格局的响应

Arid

	油蒿灌丛群落浅层土壤水分对不同降雨格局的响应
其他题名	Responses of shallow soil water content in Artemisia ordosica community to different rainfall patterns
	王博; 段玉玺; 王伟峰; 李晓晶; 刘源; 刘宗奇
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2020
卷号	31 期号:5 页码:1571-1578
中文摘要	以库布齐沙漠东缘典型分布的油蒿灌丛为对象,使用微气象观测系统连续监测2016-2018年生长季降雨及多层次土壤含水量(0~ 10、10~ 30、30~ 50 cm),研究不同降雨格局下荒漠土壤水分的时空动态变化,分析降雨事件对土壤水分的补给作用和水分入渗特征。结果表明:油蒿灌丛浅层土壤含水量在降雨脉动下产生明显的季节和垂直变化,雨量和雨前土壤含水量是影响土壤水分补给和入渗的主控因素。0~ 10 cm土层土壤对降雨反馈迅速, >3.8 mm降雨对该层产生补给作用; 10~30 cm土层土壤对降雨反馈稍显迟滞,需8.6 mm以上降雨才能产生有效补给; 30~50 cm土层土壤对降雨反馈更加滞后,降雨量超过11.8 mm后才能达到该补给深度。水分入渗速率随雨量增大而升高,随土层加深而减弱,入渗深度与雨量和雨前土壤含水量均呈显著正相关。研究期间,降雨事件以<10 mm降雨为主,占总降雨次数的78.4%,降雨对土壤的补给主要作用于30 cm以内土层,对深层土壤的补给十分有限,不利于深根性植物生长,降雨格局直接影响和改变了研究区植物群落的构成、分布和演替。
英文摘要	The shrub species,Artemisia ordosica,commonly occurs in the eastern Hobq desert. Here,we used a micrometeorological observation system to continuously monitor the rainfall and soil water content in 0-10,10-30,and 30-50 cm soil layers during the growing season from 2016 to 2018. The dynamic spatial and temporal changes in soil water content under different rainfall patterns were examined,and the replenishing effects of rainfall events on soil water content and water infiltration characteristics were analyzed. The results showed that soil water content of the surface layer in the A. ordosica community had significant seasonal and vertical variation under rainfall fluctuation. Rainfall amount and soil water content before rain were the main factors controlling soil water replenishment and infiltration. The soil surface layer (0-10 cm) was sensitive to rainfall,and the rainfall of 3.8 mm began to replenish this layer. The responses of 10-30 cm soil layer to rainfall was slower,more than 8.6 mm rainfall being needed for effective replenishment. The response of the 30-50 cm soil layer to rainfall was even more delayed,and replenishment at this depth could not be achieved until the rainfall exceeded 11.8 mm. The water infiltration rate increased with rainfall amount and decreased with soil depth,while water infiltration depth was positively correlated with the rainfall amount and soil water content before rainfall. During the study period,rainfall of <10 mm occurred predominantly,accounting for 78.4% of the total rainfall events. The rainfall mainly replenished soil layer above 30 cm,and the replenishment of deep soil was very limited,which was not conducive to the growth of deep-rooted species. Therefore,rainfall patterns directly affected the composition,distribution,and succession of plant communities in this area.
中文关键词	油蒿 ; 降雨脉动 ; 土壤水分 ; 入渗特征
英文关键词	Artemisia ordosica rainfall pulse soil water infiltration characteristics
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6725299
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336483
作者单位	王博, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 段玉玺, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 王伟峰, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 李晓晶, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 刘源, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.; 刘宗奇, 内蒙古自治区林业科学研究院, 呼和浩特, 内蒙古 010010, 中国.
推荐引用方式 GB/T 7714	王博,段玉玺,王伟峰,等. 油蒿灌丛群落浅层土壤水分对不同降雨格局的响应[J],2020,31(5):1571-1578.
APA	王博,段玉玺,王伟峰,李晓晶,刘源,&刘宗奇.(2020).油蒿灌丛群落浅层土壤水分对不同降雨格局的响应.应用生态学报,31(5),1571-1578.
MLA	王博,et al."油蒿灌丛群落浅层土壤水分对不同降雨格局的响应".应用生态学报 31.5(2020):1571-1578.