Effect of Root System on Macropores Distribution and Saturated Permeability of Surface Soil

QI Zihan; WANG Yunqi; WANG Yujie; LI Tong; WANG Yujing; HE Xiangchang

doi:10.13870/j.cnki.stbcxb.2021.05.014

您当前的位置：

首页 >

文章列表页 >

Effect of Root System on Macropores Distribution and Saturated Permeability of Surface Soil

更新时间：2025-03-12

- Effect of Root System on Macropores Distribution and Saturated Permeability of Surface Soil
- Vol. 35, Issue 5, Pages: 94-100(2021)
- 作者机构：
  
  1. 北京林业大学水土保持学院重庆三峡库区森林生态系统教育部野外科学观测研究站,北京,100083
  2. 北京林业大学水土保持学院重庆缙云山三峡库区森林生态系统国家定位观测研究站,北京,100083
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.05.014
  CLC： S152.5
- Published：2021
- 稿件说明：
移动端阅览
QI Zihan, WANG Yunqi, WANG Yujie, et al. Effect of Root System on Macropores Distribution and Saturated Permeability of Surface Soil[J]. 2021, 35(5): 94-100.
DOI：

QI Zihan, WANG Yunqi, WANG Yujie, et al. Effect of Root System on Macropores Distribution and Saturated Permeability of Surface Soil[J]. 2021, 35(5): 94-100. DOI： 10.13870/j.cnki.stbcxb.2021.05.014.

摘要

根系的存在对土壤大孔隙的产生及渗透特性有着重要影响，为研究浅表层土体中根系生物量与土壤大孔隙特征之间的数值关系，在缙云山针阔混交林中选取杉木单株植物根际土体为研究对象，进行染色示踪试验及根系生物量测量，取样后在室内采用自制定水头装置进行水分穿透试验和渗透试验。结果表明：（1）不同土壤剖面和不同土层深度的土壤染色面积不同，距离树木主干位置越远的剖面染色面积越大，而距离主干位置越近的剖面染色面积越小，且随着土层深度的增加整体上每个剖面上染色面积比均下降；（2）4个剖面整体表现出随土层深度的增加根系数量减少的趋势，根系直径主要集中在0.2~10 mm，且0.2~1 mm径级的根系较多；（3）染色区较未染色区具有更大的稳定出流速率，4个剖面染色区的出流速率分别为未染色区的1.97，1.81，1.77，1.70倍，且随着土层深度的增加大孔隙数量减少，大孔隙的半径分布范围在0.3~1.7 mm；（4）大孔隙度和根系生物量与渗透系数呈正相关关系，大孔隙度决定了渗透系数94.5%的变异，根系生物量决定了渗透系数87.4%的变异。

Abstract

Root system plays an important role in the formation and permeability of soil macropores. Aiming to clarify the numerical relationship between root biomass distribution and soil macropores characteristics

a naturally grown Chinese fir in JinYun mountain was selected as research object. The macropore area and root distribution characteristics on 4 dye tracing treated soil profiles in field were observed

and then a series of water penetration tests were conducted using self-designed constant head device for soil sampling in dyed and undyed zone in Lab. Results showed that:(1) The dyed area of soil was different for different soil profiles and different soil depths. The farther away from the trunk of the tree

the larger the dyed area

while the closer to the trunk

the smaller the dyed area

and the overall depth increased. The dyed area ratio of each section above all decreased. (2) The four soil profiles mainly showed a trend of decreasing root coefficient with the increasing soil depths. The root diameter mainly concentrated between 0.2~10 and 0.2~1 mm diameter. (3) The dyed area had a greater stable outflow rate than the undyed area. The outflow rate of the dyed area in the four sections was 1.97

1.81

1.77 and 1.70 times those of the undyed area

respectively. As the depth of the soil layer increased

the number of macropores decreased

and the radius of the macropores ranged from 0.3 to 1.7 mm; (4) The macroporosity and root biomass were positively correlated with the permeability coefficient

and the macroporosity contributed 94.5% of variation in the permeability coefficients

while root biomass contributed 87.4%.

关键词

Keywords

references

吕刚, 傅昕阳, 李叶鑫, 等.露天煤矿排土场不同复垦植被土壤大孔隙特征[J]. 煤炭学报, 2018, 43(2):529-539.

魏虎伟, 程金花, 张洪江, 等.四面山2种林地大孔隙特征与优先流关系研究[J]. 水土保持学报, 2014, 28(4):263-268.

Zhang Z B, Peng X, Zhou H, et al. Characterizing preferential flow in cracked paddy soils using computed tomography and breakthrough curve[J]. Soil and Tillage Research, 2015, 146:53-65.

石辉, 陈凤琴, 刘世荣.岷江上游森林土壤大孔隙特征及其对水分出流速率的影响[J]. 生态学报, 2005, 25(3):507-512.

Lamande M, Labouriau R, Holmstrup M, et al. Density of macropores as related to soil and earthworm community parameters in cultivated grasslands[J]. Geoderma, 2011, 162(3):319-326.

Zhang J M, Xu Z M. Dye tracer infiltration technique to investigate macropore flow paths in Maka Mountain, Yunnan province, China[J]. Journal of Central South University, 2016, 23(8):2101-2109.

JØRgensen P R, Hoffmann M, Kistrup J P, et al. Preferential flow and pesticide transport in a clay-rich till:Field, laboratory, and modeling analysis[J]. Water Resources Research, 2002, 38(11):e1246.

李建兴, 何丙辉, 谌芸.不同护坡草本植物的根系特征及对土壤渗透性的影响[J]. 生态学报, 2013, 33(5):1535-1544.

张家明, 徐则民, 马卡山.不同植被群落下非饱和带大孔隙流路径示踪试验[J]. 吉林大学学报(地球科学版), 2013, 43(6):1922-1935.

Murielle G, Sidle R C, Alexia S. The influence of plant root systems on subsurface flow:Implications for slope stability[J]. Bioscience, 2011, 2011, 61(11):869-879.

孙龙, 张洪江, 程金花, 等.重庆江津区柑橘地土壤大孔隙特征[J]. 水土保持学报, 2012, 26(3):194-198.

徐宗恒, 徐则民, 官琦, 等.不同植被发育斜坡土体优先流特征[J]. 山地学报, 2012, 30(5):521-527.

张英虎, 牛健植, 朱蔚利, 等.森林生态系统林木根系对优先流的影响[J]. 生态学报, 2015, 35(6):1788-1797.

陈风琴, 石辉.缙云山常绿阔叶林土壤大孔隙与入渗性能关系初探[J]. 西南师范大学学报(自然科学版), 2005, 30(2):350-353.

黄娟, 邓羽松, 马占龙, 等.桂东南花岗岩丘陵区不同土地利用方式土壤大孔隙特征[J]. 水土保持学报, 2021, 35(2):80-86.

罗建杰.植被发育斜坡降雨入渗的数值模拟[D].昆明:昆明理工大学, 2014.

及金楠.林分根系空间分布与水平阶整地对土质坡面稳定性的影响[D].北京:北京林业大学, 2011.

Radulovich R, Solorzano E, Sollins P. Soil macropore size distribution from water breakthrough curves[J]. Soil Science Society of America Journal, 1989, 53(2):556-559.

张家明, 徐则民, 李峰, 等.植被发育斜坡土体大孔隙结构多尺度特征[J]. 山地学报, 2019, 37(5):717-727.

van Genuchten M T A. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of America Journal, 1980, 44(5):892-898.

Lu N, Likos W J. Unsaturated soil mechanics[M]. Hoboken:John Wiley and Sons, Inc, 2004.

吕国顺.非饱和黄土渗透特性试验研究[D].兰州:兰州大学, 2020.

王鑫皓, 王云琦, 马超, 等.根系构型对土壤渗透性能的影响[J]. 中国水土保持科学, 2018, 16(4):73-82.

梅雪梅.晋西黄土区坡地土壤水分时空分布及影响机制研究[D].北京:北京林业大学, 2019.

Views

1046

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Characteristics of Soil Macropores in Granite Hilly Region Area with Different Land Use Types in Southeast Guangxi

Effects of Vegetation Root Distribution on Preferential Flow Characteristics in Woodland and Grassland of Karst Areas

Characteristics of Preferential Flow under High-content Rock Fragment Purple Soil in the Three Gorges Reservoir Area

Effect of Soil Macropore Structures on Soil and Water Loss Progress in Karst Areas

Related Author

DENG Yusong

MA Zhanlong

HUANG Zhigang

YANG Gairen

JIANG Daihua

HUANG Juan

SHI Xueqi

WANG Jiao

Related Institution

College of Forestry, Guangxi University

College of Agriculture, Guangxi University

School of Soil and Water Conservation， Beijing Forestry University

Beijing Shuimu Fangze Ecological Technology Co. Ltd.

Research Center of Water and Soil Conservation, Huazhong Agricultural University

⁰