利用染色示踪法研究四面山两种林地优先路径分布特征

魏虎伟; 程金花; 杜士才; 李辉乾; 徐贵来; 张欣; 田香姣

doi:10.13961/j.cnki.stbctb.2015.02.038

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利用染色示踪法研究四面山两种林地优先路径分布特征

试验研究

- 利用染色示踪法研究四面山两种林地优先路径分布特征
- A Study on Characteristics of Preferential Flow Paths in Two Kinds of Forest Soil in Simian Mountains Using Dyeing Tracer Method
- 水土保持通报 2015年35卷第2期页码：193-197
- 作者机构：
  
  1. 北京林业大学北京市水土保持工程技术研究中心,北京,100083
  2. 重庆市林业局,重庆,401147
- 作者简介：
- 基金信息：
  
  国家林业局推广项目"三峡库区低山丘陵区水土保持型植物群落建设技术"(2012-42);国家自然科学基金项目(4127130,0900866)
- DOI：10.13961/j.cnki.stbctb.2015.02.038
  中图分类号：
- 纸质出版：2015
- 稿件说明：
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魏虎伟, 程金花, 杜士才, 等. 利用染色示踪法研究四面山两种林地优先路径分布特征[J]. 水土保持通报, 2015,35(2):193-197.

WEI Huwei, CHENG Jinhua, DU Shicai, et al. A Study on Characteristics of Preferential Flow Paths in Two Kinds of Forest Soil in Simian Mountains Using Dyeing Tracer Method[J]. Bulletin of Soiland Water Conservation, 2015, 35(2): 193-197.
魏虎伟, 程金花, 杜士才, 等. 利用染色示踪法研究四面山两种林地优先路径分布特征[J]. 水土保持通报, 2015,35(2):193-197. DOI： 10.13961/j.cnki.stbctb.2015.02.038.

WEI Huwei, CHENG Jinhua, DU Shicai, et al. A Study on Characteristics of Preferential Flow Paths in Two Kinds of Forest Soil in Simian Mountains Using Dyeing Tracer Method[J]. Bulletin of Soiland Water Conservation, 2015, 35(2): 193-197. DOI： 10.13961/j.cnki.stbctb.2015.02.038.

摘要

[目的] 研究不同林种土壤的优先路径分布特征

为土壤水的高效利用以及植物生长环境改善等方面的研究提供理论参考。[方法] 以重庆四面山张家山的针阔混交林和楠竹林为研究对象

在林地土壤存在优先路径的情况下

运用染色示踪法研究了水分及溶质的运移

并对采集的垂直剖面染色图像进行处理分析。[结果] 两种林地对水分入渗的响应不同

染色路径宽度和染色路径数量在同一剖面不同深度处及不同剖面同一深度处均呈现明显的异质性:(1)针阔混交林染色路径宽度曲线呈"倒阶梯型";(2)楠竹林染色路径宽度曲线呈S形。两种林地的土壤优先流宽度和数量在一定范围内均随着深度增加而逐渐下降。[结论] 两种林地均存在优先流现象

随着深度增加优先流路径不均匀递减

在0-20 cm深度内

植物根系对土壤优先流影响较大。

Abstract

[Objective]The distribution characteristics of preferential flow path in the two kinds of forest soil were studied in order to provide a theoretical reference for some reseaches such as efficient utilization of soil water and improving plant growth environment.[Methods] Dyeing tracer method was used and dyed soil profiles where there was preferential flow way occurred were photographed for further process and analysis.[Results] The patterns of water infiltration in the two kinds of forest soil were different. Width and amount of staining paths were heterogeneous in different depths of a profile and different profiles at the same depth. (1) The dying path's shape of soil under conifer-broadleaf forest looked like "inverted ladder"; (2) the shape under Phyllostachys pubescens land looked like a S-type. The width and the number of staining path in these two forests reduced gradually with the increase of soil depth.[Conclusion]It is concluded that preferential flow occurred in both of the forests

and its way unevenly decreased with the increase of soil depth. Plant roots at depth of 0-20 cm have a more remarkable influence on preferential flow germination as compared to the roots at other depths.

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references

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