中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 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 2016,47 (2) 212-217
Position: Home > Articles > Soil Water Repellency of Moss-dominated Biological Soil Crusts and Their Response to Fire Duration on the Loess Plateau of China Journal of Shenyang Agricultural University 2016,47 (2) 212-217

黄土高原苔藓结皮斥水性及其对火烧时间的响应

作  者：
郭成久;陈乐;肖波;贾玉华;王庆海
单  位：
沈阳农业大学;中国农业大学;北京市农林科学院
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
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。
译  名：
Soil Water Repellency of Moss-dominated Biological Soil Crusts and Their Response to Fire Duration on the Loess Plateau of China
作  者：
GUO Cheng-jiu;CHEN Le;XIAO Bo;JIA Yu-hua;WANG Qing-hai;College of Water Conservancy, Shenyang Agricultural University;College of Resources and Environmental Sciences, China Agricultural University;Research & Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Sciences;
关键词：
microbiotic crust;;moss crust;;fire duration;;water drop penetration time;;water repellence intensity;;water repellency index
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 moss-dominated 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 90 s 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.

相似文章

导出引用
计量
文章访问数: 10
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46