Effect of multiple wetting and drying cycles on the macropore structure of granite residual soil

Wen, Tiande; Chen, Xiang-Sheng; Shao, Longtan

doi:10.1016/j.jhydrol.2022.128583

Cited by 27 publications

(13 citation statements)

References 43 publications

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“…This result is mainly associated with the increased contribution of pore sizes between 50 and 200 µm to imaged porosity after W-D cycles (Figure 5c,d). In addition, an increase in the number of rounded-shaped pores from 20 to 300 µm and elongated-shaped pores between 50 and 100 µm also helped to explain the increment of the contribution of these pore types to imaged porosity [64,65] (Figure 5e,f). The increased contribution of elongated-shaped pores to imaged porosity following W-D cycles could probably be associated with the appearance of fine fissures, while that of large (500-1000 µm) irregular-shaped pores was due to a slight increase in the number of these pore types [16,19,60].…”

Section: Discussionmentioning

confidence: 92%

Changes in Soil Water Retention and Micromorphological Properties Induced by Wetting and Drying Cycles

Pires

2023

Soil Systems

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Wetting and drying (W-D) cycles are responsible for significant changes in soil structure. Soil often undergoes irreversible changes affecting infiltration and solute retention through W-D cycles. Thus, it becomes essential to evaluate how soils under natural conditions are altered by W-D cycles. This study analyzed two non-cultivated (from grassland and secondary forest) Oxisols (Typic Hapludox and Rhodic Hapludox) of different textures under 0 and 6 W-D cycles. The main results obtained showed that soil water retention was mainly affected in the driest regions (smaller pore sizes). The contribution of residual pores to total porosity increased with 6 W-D and transmission pores decreased in both soils. The Rhodic Hapludox presented differences in water content at field capacity (increase), while the Typic Hapludox showed alterations at the permanent wilting point (increase), affecting the amount of free water (Rhodic Hapludox) and water available to plants (Typic Hapludox). Both soils showed increases in imaged porosity with 6 W-D. Variations in the contribution of small and medium rounded pores, mainly large and irregular (with an increase in both soils not significant in the Rhodic Hapludox), could explain the results observed. The micromorphological properties were mainly influenced by changes in the number of pores, in which smaller pores joined, forming larger ones, increasing the areas occupied by larger pores. Overall, this study showed that the investigated soils presented pore systems with adequate water infiltration and retention capacities before and after continuous W-D cycles.

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Section: Discussionmentioning

confidence: 92%

Changes in Soil Water Retention and Micromorphological Properties Induced by Wetting and Drying Cycles

Pires

2023

Soil Systems

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“…The decrease in soil porosity in the warming system is due to the fact that increasing soil temperature reduces soil moisture (Scharn et al, 2021). Dry soil usually has an unstable and poorly developed structure, resulting in high apparent density (compaction) and low porosity (Wen et al, 2022). As the soil porosity decreased in the warmed treatment, the ratio of soil solids increased (Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…Dry soil usually has an unstable and poorly developed structure, resulting in high apparent density (compaction) and low porosity (Wen et al. , 2022). As the soil porosity decreased in the warmed treatment, the ratio of soil solids increased (Table 1).…”

Section: Discussionmentioning

confidence: 99%

Long-term warming altered soil physical structure and soil organic carbon pools in wheatland field

Ma,

Kou,

Cheng

et al. 2024

Ex. Agric.

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Summary The impacts of long-term warming on soil physical structure and soil organic carbon (SOC) pools are currently disputed and uncertain. We conducted an eleven-year warming experiment in wheatland field in Henan, China. We found that long-term warming significantly increased soil bulk density by 4.5%, and significantly decreased total porosity and non-capillary porosity by 3.4% and 5.0%, respectively. Besides, long-term warming decreased the >2 mm fraction proportion and increased <0.053 mm fraction proportion of dry and wet aggregates. The mean weight diameter value for dry and wet aggregates in long-term warming treatment was significantly decreased by 7.0% and 6.7%, respectively. Moreover, long-term warming significantly decreased the total SOC, very labile pool (F1) and labile pool (F2) content by 10.6%, 30.6%, and 43.6%, and significantly increased the less labile pool (F3) and non-labile pool (F4) content by 94.2% and 21.1%, respectively. Long-term warming increased the passive carbon pool percentage but decreased the active carbon pool (ACP) percentage. Our results suggest that long-term warming negatively affected the soil's physical structure and impaired soil ACP accumulation. The findings of this study help improve our understanding of the response of farmland soils in northern China to climate change and provide scientific basis for establishing carbon management measures in farmland.

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“…Irrigation with alkaline waters (with high carbonate and bicarbonate content) caused an increase in soil pH and Na saturation of the soils. As a result, notable soil aeration and permeability reduction were noted due to soil aggregate slaking and clay dispersion and clogging soil pores [17,18]. Yet, the result was soil texture dependent [19,20].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Sodic Water Type on the Chemical Properties of Calcareous Soil in Semi-Arid Irrigated Land

Peker,

Öztürk,

Mamedov

2024

Soil Systems

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Irrigation of calcareous soil with saline–sodic water can modify the composition of the soil solution and exchange complexes in agricultural land of arid and semi-arid regions with low water resources. The objective of this study was to monitor (medium-term) potential changes in a calcareous clay soil irrigated with two types of sodic waters without cropping. Irrigation water with two high sodium adsorption ratios (SAR = 20 and 40) and electrical conductivity (EC < 3 dS m−1) was prepared using NaCl and NaHCO3 salts. The sodic irrigation waters were applied (June–October) in three periods (1, 2, and 4; one period = five irrigations) to bare non-saline soil with drip irrigation during two growing seasons; no irrigation action was taken in the winter–spring rainy season (period 3). Sampling (0–30 cm) was made after each period to determine the changes in soil pH, EC, water-soluble Na+, Ca2+, Mg2+, K+, Cl−, and HCO3−. Relative to the control, irrigation with both sodic waters increased soil pH, EC, and water-soluble Na+ and decreased or did not change water-soluble cations (Ca2+, Mg2+). The Cl− concentration increased rapidly with NaCl-type water application, but it was leached away quickly by winter–spring rains. The HCO3− concentration increased with NaHCO3-type water application, yet it leached out slowly in the rainy period. The movement of HCO3− ions in the upper soil profile (0–30 cm) was significantly slower compared to Cl− ions. Dissolution of slightly soluble soil CaCO3 by irrigation increased the solution concentration of Ca2+ and its mobility, yet the kinetics of processes depended on water type and irrigation period. The released Ca2+ interacted with other cations in the soil, causing further significant positive physicochemical changes in the soil solution and exchange capacity (comparable with control soil) at the end of the irrigation period. The CaCO3 content in the soil would be a long-term guarantee of the Ca2+ resource in soils, even if the amount of water-soluble Ca2+ may decrease for the short-term period during irrigation. The results should be considered for rational irrigation management (with various water qualities) in semi-arid and arid regions.

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Effect of multiple wetting and drying cycles on the macropore structure of granite residual soil

Cited by 27 publications

References 43 publications

Changes in Soil Water Retention and Micromorphological Properties Induced by Wetting and Drying Cycles

Changes in Soil Water Retention and Micromorphological Properties Induced by Wetting and Drying Cycles

Long-term warming altered soil physical structure and soil organic carbon pools in wheatland field

The Effect of Sodic Water Type on the Chemical Properties of Calcareous Soil in Semi-Arid Irrigated Land

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