华北土石山区森林土壤大孔隙对土壤理化性质及根系的响应

孟晨; 牛健植; 骆紫藤; 尹正聪

doi:10.13870/j.cnki.stbcxb.2019.03.015

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华北土石山区森林土壤大孔隙对土壤理化性质及根系的响应

更新时间：2025-03-12

- 华北土石山区森林土壤大孔隙对土壤理化性质及根系的响应
- Response of Soil Macropore to Soil Phychemical Properties and Root in Forest in Rocky Mountain Area of North China
- 水土保持学报 2019年33卷第3期页码：94-100
- 作者机构：
  
  1. 宁夏大学西北土地退化与生态系统恢复省部共建国家重点实验室培养基地,银川,750021
  2. 宁夏大学西北退化生态系统恢复与重建教育部重点实验室,银川,750021
  3. 北京林业大学水土保持学院,北京,100083
  4. 德克萨斯A&M大学地理学院,德克萨斯,77843
- 作者简介：
  
  [ "孟晨(1990-),男,宁夏石嘴山人,助理研究员,主要从事水土保持与土壤水文研究。E-mail:mengchen@nxu.edu.cn" ]
- 基金信息：
  
  宁夏大学自然科学基金项目（ZR18017）
- DOI：10.13870/j.cnki.stbcxb.2019.03.015
  中图分类号：
- 纸质出版：2019
- 稿件说明：
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孟晨, 牛健植, 骆紫藤, 等. 华北土石山区森林土壤大孔隙对土壤理化性质及根系的响应[J]. 水土保持学报, 2019,33(3):94-100.

MENG Chen, NIU Jianzhi, LUO Ziteng, et al. Response of Soil Macropore to Soil Phychemical Properties and Root in Forest in Rocky Mountain Area of North China[J]. 2019, 33(3): 94-100.
孟晨, 牛健植, 骆紫藤, 等. 华北土石山区森林土壤大孔隙对土壤理化性质及根系的响应[J]. 水土保持学报, 2019,33(3):94-100. DOI： 10.13870/j.cnki.stbcxb.2019.03.015.

MENG Chen, NIU Jianzhi, LUO Ziteng, et al. Response of Soil Macropore to Soil Phychemical Properties and Root in Forest in Rocky Mountain Area of North China[J]. 2019, 33(3): 94-100. DOI： 10.13870/j.cnki.stbcxb.2019.03.015.

摘要

土壤大孔隙是土壤水分、空气、化学物质及污染物优先运移的主要通道，对其形成机制的研究至关重要。以往对大孔隙的量化局限于传统方法，大孔隙三维形态特征的量化分析及其影响因素是目前大孔隙的研究重点。利用CT扫描及图像处理分析技术量化大孔隙三维形态特征参数，同时测定土壤基本理化性质及根长密度，分析土壤大孔隙三维特征对土壤理化性质及根系的响应。结果表明：土壤密度及土壤砂粒含量与大孔隙特征参数不存在相关关系）土壤有机质含量、土壤根长密度与大孔隙体积密度、大孔隙表面积密度、大孔隙数量密度呈现显著正相关关系，与大孔隙平均迂曲度呈现显著负相关关系。林木根系与土壤有机质对土壤大孔隙三维特征产生积极影响，表现为根系及土壤有机质含量越多，则大孔隙含量也越多，并具有更差的弯曲度。在今后对山地森林抚育管理、土壤水分运动机理及地下水污染评估等研究过程中不能忽略根系及土壤有机质差异对土壤大孔隙的重要影响。

Abstract

Soil macropore is the main channel for preferential transport of soil moisture

air

chemical substances and pollutants

so the studies on its formation mechanism are of great importance. In the past

the quantification of macropore was limited to the traditional methods. But nowadays

quantitative analysis of three-dimensional morphological characteristics of soil macropore and its influencing factors are the research focus. In this paper

CT scanning and image processing techniques were used to quantify the 3-D characteristic parameters of macropore

and the basic physical and chemical properties of soil and root length density were also determined. The correlations between soil physicochemical properties

soil roots and the 3-D characteristics of soil macropore were analyzed. The results showed that there was no correlation between soil density

soil sand contents and characteristic parameters of macropore; soil organic matter contents and root length density were significantly positively correlated with volume density

surface area density and number density of macropore

and significantly negatively correlated with mean tortuosity of macropore. Soil organic matter and roots had a positive impact on the 3-D characteristics of soil macropore

the more roots and organic matter contents

the more macropore contents

and the worse bending degree of macropore. In the future

the effects of root system and organic matter should not be neglected in the studies of forest tending and management

soil water movement mechanism and groundwater pollution assessment.

关键词

Keywords

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