[1]Zhang Yingjie,Liu Xiangfeng,Zhang Qiang,et al.Influence of Different Herbaceous Roots on Soil Permeability[J].Research of Soil and Water Conservation,2024,31(04):145-152.[doi:10.13869/j.cnki.rswc.2024.04.014]
Copy
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 04
Page number:
145-152
Column:
Public date:
2024-06-30
- Title:
-
Influence of Different Herbaceous Roots on Soil Permeability
- Author(s):
-
Zhang Yingjie, Liu Xiangfeng, Zhang Qiang, Wang Laigui, Hao Guoliang
-
(College of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China)
-
- Keywords:
-
root type; root length density; root surface area density; soil permeability; root-soil complex
- CLC:
-
U416.14
- DOI:
-
10.13869/j.cnki.rswc.2024.04.014
- Abstract:
-
[Objective]The aims of this study are to reveal the effects of different herb roots on soil permeability in local dump sites, to clarify the optimal index for predicting the improvement of soil permeability by herbaceous plant roots, to obtain the optimal diameter grade of herbaceous plant roots to improve soil permeability, so as to provide an important basis for the selection of ecological restoration plants in the dump. [Methods]Haizhou open pit dump was taken as the study site. The axial root type of Viola philippica, the tiller root type of Ixeris polycephala and the rhizome root type of Triglochin palustris were the objects of the study. The root distribution characteristics of three kinds of roots in different soil depths were quantified by image pixel conversion method. Combined with the penetration test, the permeability parameters of the undisturbed root-soil complex of three herbaceous plants were obtained. The relationship between root distribution parameters and permeability parameters of the root-soil complex was explored. [Results]All three herbs can improve soil permeability. Compared with plain soil, the initial infiltration rate, steady infiltration rate, average infiltration rate and total infiltration rate of axial, rhizoid and tillering root soil composites increase by 82.23%~254.99%, 85.59%~307.63%, 72.02%~325.91% and 62.93%~246.98%, respectively. The root length density and root surface area density of the three herbaceous roots are linearly correlated with the permeability parameters of the root soil complex, and the correlation of root surface area density is stronger than that of root length density. The enhancement effect of three kinds of roots on soil permeability is mainly attributed to the diameter class of 0.5 mm<D≤1.5 mm, and they all have the best diameter class to enhance soil permeability. [Conclusion]Herbaceous roots can improve soil permeability, and root surface area density is the best predictor, and different roots have the best diameter class.