Influence of exclosure on CT-measured soil macropores and root architecture in a shrub-encroached grassland in northern China

Hu, Xia; Li, Xiaoyan; Wang, Pei; Liu, Yong; Wu, Xiuchen; Li, Zong-Chao; Zhao, Yun‐Duo; Cheng, Y.S.; Guo, Lanlan; Lyu, Yanli; Liu, Lianyou

doi:10.1016/j.still.2018.10.020

Cited by 43 publications

(24 citation statements)

References 47 publications

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“…main factors affecting the difference between pasture and arable land soil was the increased earthworm activity under perennial grassland. In addition, the significant development of plant roots under pastures resulted in a large number of macropores in the soil (Hu et al, 2019). Our results have revealed that in arable land under conventional tillage, the same macroporosity (0.029 m 3 m -3 ) was observed at both (3-8 and 15-20 cm) soil depths.…”

Section: Resultssupporting

confidence: 56%

“…Also, the root length density had a positive correlation with the volume of very fine macropores (r = 0.91, p < 0.01). A significant correlation between macroporosity and root density for enclosed shrub lands and grazed shrub lands was recorded by Hu et al (2019). CONCLUSIONS 1.…”

Section: Resultsmentioning

confidence: 80%

“…Plant roots use them as paths for growth. The wormholes, soil cracks and voids between aggregates are often associated with a high degree of variability in the transport of the gases, moisture (Helliwell et al, 2013), and dissolved substances through the soil (Hu et al, 2010(Hu et al, , 2016(Hu et al, , 2019.…”

Section: Introductionmentioning

confidence: 99%

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Quantification of the relationship between root parameters and soil macropore parameters under different land use systems in Retisol

Kochiieru¹,

Lamorski²,

Feiza³

et al. 2020

Int. Agrophys.

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The study aimed to quantify the relationship between root parameters and soil macropore characteristics in two soil layers of Retisol from a hilly landscape in Western Lithuania, as influenced by different land use systems. The decreases in root volume and root length density were dependent on land use and soil depth. The values of root length density and root volume at 0-20 cm depth tended to decrease in the following order: grassland > forest > arable land under conventional tillage. The highest volume in the framework of macropores was recorded for medium-size pores under arable land (3.02%), for fine pores (2.56%) in forest soil and very fine pores in grassland soil (below 1.19%) at the 0-10 cm soil depth, while at 10-20 cm soil depth, the coarse macropores dominated in the arable land system (below 1.41%). Root length density, root volume and the volume of very fine macropores had close relationships (p < 0.01, r = 0.91 and r = 0.68, respectively) under different land use at 0-20 cm depth. In Retisol, the roots were concentrated at 0-10 cm soil depth, and their volume was higher compared to the 10-20 cm depth. Plant roots increased the volume of very fine macropores in all land use systems, within the entire 0-20 cm soil depth. K e y w o r d s: plough layer, porosity, root length, root volume, tillage, X-ray computed tomography

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Section: Resultssupporting

confidence: 56%

Section: Resultsmentioning

confidence: 80%

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Quantification of the relationship between root parameters and soil macropore parameters under different land use systems in Retisol

Kochiieru¹,

Lamorski²,

Feiza³

et al. 2020

Int. Agrophys.

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“…High soil macropores connectivity is possibly caused by good soil structures and well established biological activity (Wu et al 2017 ; Soracco et al 2019 ). Root channels can contribute more to the high soil macropores connectivity (Hu et al 2019b ). More connected soil macropores can be closely correlated with rich root systems (Zhang et al 2015 ).…”

Section: Hydrological Connectivity At Multiscales and Its Effects On Ecohydrologymentioning

confidence: 99%

“…More connected soil macropores can be closely correlated with rich root systems (Zhang et al 2015 ). Root systems have created more powerful flow paths which may connect with these existing soil macropores to make them hydrologically active (Hu et al 2019b ). Besides root systems, the connectivity is also more related with soil physical and chemical characteristics (Conte and Ferro 2018 ).…”

Section: Hydrological Connectivity At Multiscales and Its Effects On Ecohydrologymentioning

confidence: 99%

The concept, approach, and future research of hydrological connectivity and its assessment at multiscales

Zhang

Huang

Zhang

et al. 2021

Environ Sci Pollut Res

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In this review, we explore the concept, approach, and future research of hydrological connectivity and its assessment at multiscales, because according to the literature, an integrated review upon hydrological connectivity is lack. Systematic studies illustrate the effects of (i) human activities (i.e., dam construction, groundwater extraction, water flow regulation and diversion, and land management) and (ii) natural factors (i.e., climate, soil characteristics, vegetation, and topography) on hydrological connectivity. Approaches (i.e., soil water content patterns, runoff patterns and processes, numerical models, and index of hydrological connectivity) applied to evaluate hydrological connectivity are examined in detail. Lastly, hydrological connectivity at multiscales is indicated. This review concludes with a discussion of potential research trends that can improve understanding of hydrological connectivity. Reported records showed that few studies were published on hydrological connectivity from 1980 to 2003, whereas the evolution of these studies is temporally promising since 2003. We cannot define a standard concept of hydrological connectivity that works in all environments. We desire to show different concepts of hydrological connectivity in different environments. The degree and nature of hydrological connectivity are not static due to the influences of human activities and changes of natural factors. The index of hydrological connectivity and numerical models are the most significant approaches to assess the changes in hydrological connectivity. This study showed that considering hydrological connectivity in social-economical-ecological-hydrological frameworks can prevent its negative effects on surface or subsurface water quantity and quality and is beneficial for sound water sources management.

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Effects of roots systems on hydrological connectivity below the soil surface in the Yellow River Delta wetland

et al. 2021

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In this study, a new method based on field dye-tracing experiments was used to assess hydrological connectivity below the soil surface. In this method, Phragmites australis in the Yellow River Delta wetland was considered to characterize the interaction between roots systems and hydrological connectivity. The results showed that index of hydrological connectivity (IHC) declined non-linearly with depth below the soil surface. Roots systems of P. australis were mostly distributed in soils of 0-30 cm.Roots systems parameters (root length, root width, root surface area, root projected area, root volume and root biomass) were positively correlated with IHC. Coarse roots systems (3 < D < 5 mm) made the highest contribution to the changes of IHC.This study provided suggestions for wetland management in the study area: (1) Reeds should not be reaped every year to promote the litters decomposition for roots nutrition availability; and (2) freshwater inputs should be strengthened in the initial/ middle growth stage of reeds to improve roots architecture. Knowledge about the interaction between roots systems and hydrological connectivity below the soil surface is crucial for large-scale wetland protection as wetland managers regulate the control and distribution of vegetation.

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Influence of exclosure on CT-measured soil macropores and root architecture in a shrub-encroached grassland in northern China

Cited by 43 publications

References 47 publications

Quantification of the relationship between root parameters and soil macropore parameters under different land use systems in Retisol

Quantification of the relationship between root parameters and soil macropore parameters under different land use systems in Retisol

The concept, approach, and future research of hydrological connectivity and its assessment at multiscales

Effects of roots systems on hydrological connectivity below the soil surface in the Yellow River Delta wetland

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