文章摘要
侯芳, 杨志, 程金花, 王通簙.永定河(北京段)滨河带藤本和次生乔木林土壤优先流特征[J].水土保持学报,2021,35(3):143~149
永定河(北京段)滨河带藤本和次生乔木林土壤优先流特征
Characteristics of Preferential Flow of Liana and Secondary Arbor Forest Along Yongding Riverside (Beijing Section)
投稿时间:2020-11-09  
DOI:10.13870/j.cnki.stbcxb.2021.03.020
中文关键词: 滨河带  藤本植被  根长密度  优先流
英文关键词: riverside  liana  root length density  preferential flow
基金项目:国家水体污染控制与治理科技重大专项(2018ZX07101005)
作者单位E-mail
侯芳1, 杨志2, 程金花1, 王通簙1 1. 北京林业大学水土保持学院, 北京 100083

2. 宁夏回族自治区水土保持监测总站
, 银川 750000 
Jinhua_cheng@126.com 
摘要点击次数: 27
全文下载次数: 30
中文摘要:
      以永定河(北京段)滨河带的藤本植被和次生乔木林为研究对象,采用野外染色示踪法和根系分析法,利用形态学和统计分析学的解译手段,对得到的剖面染色图片进行优先流特征研究。结果表明:藤本植被覆盖的样地基质流深度比次生乔木林小5.48 cm,优先路径的通道数量比次生乔木林多67%。藤本植被的优先流现象更明显,平均染色面积比(34.17%)、优先流比(69.44%)和长度指数(457.79%)分别比乔木样地大9.89%,18.66%,25.71%。2种覆被状况下根长密度随土层深度增加逐渐减小,藤本植被覆盖下土壤表层0—10 cm根长密度是次生乔木林样地的2.96倍。2种覆被状况下的染色面积比和根长密度关系曲线拟合较好,藤本样地相关指数R2高达0.97。在相同外界条件下,藤本植被覆盖下的土壤比次生乔木林土壤优先流程度更大。
英文摘要:
      Taking liana vegetation and secondary arbor forest in Yongding (Beijing section) riverside as the research object, this paper studied preferential flow characteristics of the section dyed pictures and infiltration water volume by using the methods of field dyeing tracer, root system analysis, morphological and statistical analysis. The results showed that the depth of matrix flow in the sample plot covered by liana vegetation was 5.48 cm smaller than that in the secondary arbor forest, and the number of channels with preferential flow paths was 67% more than that in the secondary arbor forest. The phenomenon of preferential flow was more obvious in liana vegetation sample plot, and the average dyeing area ratio (34.17%), preferential flow ratio (69.44%) and length index (457.79%) were 9.89%, 18.66% and 25.71% larger than those of arbor forest plot, respectively. In the two kinds of plots, the root length density decreased with the increasing of soil depth. The root length density of 0-10 cm surface soil layer in liana plot was 2.96 times higher than that in secondary arbor forest. The relationship curve between dye area ratio and root length density was well fitted, and the correlation index R2 of liana plot was 0.97. Under the same external conditions, the soil under liana vegetation had higher preferential flow degree than that under secondary arbor forest.
查看全文   查看/发表评论  下载PDF阅读器
关闭