Soil Saturated Hydraulic Conductivity and Its Influencing Factors of Typical Vegetation Types in Beijing Mountainous Area

ZHANG Yi; LIN Yiyan; JIA Guodong; YU Xinxiao; WANG Yusong; LEI Ziran

doi:10.13870/j.cnki.stbcxb.2022.06.022

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Soil Saturated Hydraulic Conductivity and Its Influencing Factors of Typical Vegetation Types in Beijing Mountainous Area

更新时间：2025-03-12

- Soil Saturated Hydraulic Conductivity and Its Influencing Factors of Typical Vegetation Types in Beijing Mountainous Area
- Vol. 36, Issue 6, Pages: 171-178(2022)
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 北京林业大学国家林业和草原局水土保持重点实验室,北京,100083
  3. 福建农业职业技术学院园艺园林学院,福州,350119
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2022.06.022
  CLC： S152.7
- Published：2022
- 稿件说明：
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ZHANG Yi, LIN Yiyan, JIA Guodong, et al. Soil Saturated Hydraulic Conductivity and Its Influencing Factors of Typical Vegetation Types in Beijing Mountainous Area[J]. 2022, 36(6): 171-178.
DOI：

ZHANG Yi, LIN Yiyan, JIA Guodong, et al. Soil Saturated Hydraulic Conductivity and Its Influencing Factors of Typical Vegetation Types in Beijing Mountainous Area[J]. 2022, 36(6): 171-178. DOI： 10.13870/j.cnki.stbcxb.2022.06.022.

摘要

研究典型植被类型的土壤饱和导水率(Ks)分布及其影响因素

可为北京山区植被建设提供有力借鉴

同时加深对于土壤水分运动的理解。选取北京山区最具代表性的4种植被类型

获取不同类型、不同层次的土壤饱和导水率

调查土壤理化性质与根系生物量、石砾体积

利用Pearson相关性分析、多元逐步回归、通径分析

明晰了北京山区典型植被类型下的土壤饱和导水率分布及其影响因素。结果表明:(1)土壤饱和导水率介于0.05~2.23 mm/min

属于高度变异

随土层向下不断减小

侧柏×灌木混交林、侧柏纯林与侧柏×五角枫混交林的土壤饱和导水率存在显著差异(p＜0.05)。土壤饱和导水率与土层深度之间的关系符合对数函数关系式y=±aln x+b

R2≥0.858。(2)相关性分析结果表明

土壤饱和导水率与容重、总孔隙度、毛管孔隙度、根系生物量、有机质含量均呈极显著相关关系(p＜0.01)

与非毛管孔隙度、自然含水率呈显著相关关系(p＜0.05)。(3)逐步回归分析得Y=3.42X2+0.78X6-1.333

R2=0.862。进一步通径分析可知

根系生物量主要通过直接作用影响土壤饱和导水率

而总孔隙度通过间接作用影响土壤饱和导水率。可知

侧柏×灌木混交林的导水性能最佳

后续的植被建设应重点考虑侧柏×灌木混交林

以达到减少径流、涵养水源的目的。

Abstract

The distribution of soil saturated hydraulic conductivity (Ks) and its influencing factors under typical vegetation types can provide a powerful reference for vegetation construction in Beijing mountainous area and deepen the understanding of soil water movement. In this study

four typical vegetation types in Beijing mountainous area were selected

and soil physical and chemical properties

root biomass and gravel volume were investigated. Based on Pearson correlation analysis

multiple stepwise regression analysis and path analysis

the distribution of soil saturated hydraulic conductivity and its influencing factors were obtained. The results showed that: (1) The soil saturated hydraulic conductivity ranged from 0.05 mm/min to 2.23 mm/min

which belonged to the height variation and decreased with the soil layer downward. The soil saturated hydraulic conductivity of the mixed forest of Platycladus Orientalis and Shrub

pure forest of Platycladus Orientalis and mixed forest of Platycladus Orientalis and Acer elegantulum were significantly different (p＜0.05). The relationship between soil saturated hydraulic conductivity and depth was in accordance with logarithmic function y=±aln x+b

R2≥0.858. (2) Correlation analysis showed that soil saturated hydraulic conductivity was significantly correlated with bulk density

total porosity

capillary porosity

root biomass and organic matter content (p＜0.01)

there was significant correlation with non-capillary porosity and natural water content (p＜0.05). (3) Stepwise regression analysis showed Y=3.42X2+0.78X6-1.333

R2=0.862. Further path analysis showed that root biomass mainly affected soil saturated hydraulic conductivity directly

while total porosity affected soil saturated hydraulic conductivity indirectly. And as it turns out

the mixed forest of Platycladus Orientalis and shrub has the best water conductivity

and the latter vegetation construction should focus on the mixed forest of Platycladus Orientalis and shrub in order to reduce runoff and conserve water sources.

关键词

Keywords

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