干旱区生态环境知识资源中心(Arid): 黄土高原苔藓结皮斥水性及其对火烧时间的响应

Arid

	黄土高原苔藓结皮斥水性及其对火烧时间的响应
其他题名	Soil Water Repellency of Moss-dominated Biological Soil Crusts and Their Response to Fire Duration on the Loess Plateau of China
	郭成久; 陈乐; 肖波; 贾玉华; 王庆海
来源期刊	沈阳农业大学学报
ISSN	1000-1700
出版年	2016
卷号	47 期号:2 页码:212-217
中文摘要	生物结皮是干旱和半干旱地区地表覆被的重要组成部分,可对土壤理化性状以及水土流失产生重要影响,其中土壤斥水性是一个重要方面。使用滴水穿透时间法、酒精溶液入渗法以及盘式吸渗仪法,分别测定了黄土区典型苔藓结皮和无结皮对照的斥水时间、斥水强度以及斥水系数, 对比研究了苔藓结皮对土壤斥水性的影响。同时, 对苔藓结皮进行了不同时间(15,30,45,60,90s)的火烧处理,分析苔藓结皮的斥水性对火烧时间的响应。结果表明:黄土区苔藓结皮的平均斥水时间为22.95s,斥水强度(酒精溶液临界浓度)为3%,斥水系数为2.66。与无结皮对照相比,苔藓结皮的斥水时间和斥水系数分别显著增加了12倍和14.6%。同时,火烧处理显著增强了苔藓结皮的斥水性,且火烧时间越长其斥水性越强。15,30,45,60,90s火烧处理后,苔藓结皮的斥水时间分别增加0.9,31.4,19.3,54.8,127.4倍,斥水系数分别增加8.9%、11.2%、21.2%、21.9%、28.9%。说明黄土区苔藓结皮具有较强斥水性,且火烧处理可使其斥水性进一步增强,因此在该地区土地利用和管理中应予以重视。
英文摘要	Biological soil crusts (BSCs) are very important components of land cover in arid and semiarid climate regions. The soil water repellency of BSCs is of great importance to their hydrological and ecological function, but have not yet sufficiently investigated. On the Loess Plateau of China, the duration, intensity, and indices of soil water repellency of the typical mossdominated BSCs, the BSCs after different burning durations (15, 30, 45, 60, 90s), and no crust were measured by the methods of water-drop penetration time, molarity of ethanol droplet, and mini disk infiltrometer, respectively, to determine the effects of BSCs on soil water repellency and their response to fire duration. The results showed that the duration, intensity, and indiex of soil water repellency of the BSCs were 22.5s, 3%, and 2.66, respectively. Compared with the no crust, the duration and the index of soil water repellency were significantly increased by 12 times and 14.6%, respectively, due to the occurrence of BSCs. After 15, 30, 45, 60 and 90s of fire, the duration times of soil water repellency indices of the BSCs were increased by 0.9, 31.4, 19.3, 54.8, and 127.4, respectively, whereas the soil water repellency indices of the BSCs were increased by 8.9%, 11.2%, 21.2%, 21.9%, and 28.9%, respectively. This results indicated that the soil water repellency of the BSCs was further intensified by the fire. From this study, we concluded that the moss-dominated BSCs have significant influences on soil water repellency on the Loess Plateau of China, and these influences would be further significantly strengthened by fire.
中文关键词	生物结皮 ; 苔藓结皮 ; 火烧 ; 斥水时间 ; 斥水强度 ; 斥水系数
英文关键词	microbiotic crust moss crust fire duration water drop penetration time water repellence intensity water repellency index
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:5698819
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234708
作者单位	郭成久, 沈阳农业大学水利学院, 沈阳, 辽宁 110161, 中国.; 陈乐, 沈阳农业大学水利学院, 沈阳, 辽宁 110161, 中国.; 贾玉华, 沈阳农业大学水利学院, 沈阳, 辽宁 110161, 中国.; 肖波, 中国农业大学资源与环境学院, 北京 100193, 中国.; 王庆海, 北京市农林科学院北京草业与环境研究发展中心, 北京 100097, 中国.
推荐引用方式 GB/T 7714	郭成久,陈乐,肖波,等. 黄土高原苔藓结皮斥水性及其对火烧时间的响应[J]. 中国农业大学,2016,47(2):212-217.
APA	郭成久,陈乐,肖波,贾玉华,&王庆海.(2016).黄土高原苔藓结皮斥水性及其对火烧时间的响应.沈阳农业大学学报,47(2),212-217.
MLA	郭成久,et al."黄土高原苔藓结皮斥水性及其对火烧时间的响应".沈阳农业大学学报 47.2(2016):212-217.