Biochar application driven change in soil internal forces improves aggregate stability: Based on a two-year field study

Hu, Feinan; Xu, Chenyang; Ma, Ruijuan; Tu, Kun; Yang, Jing; Zhao, Shiwei; Yang, Mingyi; Zhang, Fengbao

doi:10.1016/j.geoderma.2021.115276

Cited by 39 publications

(40 citation statements)

References 91 publications

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“…Biochar application was capable of enhancing SOC sequestration (Hu et al, 2021;Wang et al, 2016). Many previous studies have shown that biochar addition increased SOC (Blanco-Canqui et al, 2020;Wang et al, 2020;Zheng et al, 2016), which is confirmed in our study (Table 1).…”

Section: Soc Poc Doc and Locsupporting

confidence: 90%

Long‐term biochar application governs the molecular compositions and decomposition of organic matter in paddy soil

Sun

Zhang

et al. 2021

GCB Bioenergy

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Section: Soc Poc Doc and Locsupporting

confidence: 90%

Long‐term biochar application governs the molecular compositions and decomposition of organic matter in paddy soil

Sun

Zhang

et al. 2021

GCB Bioenergy

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“…Besides, the net attractive pressure was higher and the net repulsive pressure was lower in Binxian soil than Keshan soil under the same electrolyte concentration (Figure 4); this may be due to the higher soil organic matter (SOM) content in Keshan soil than Binxian soil (Table 1). Increasing SOM can improve the effective Hamaker constant of soils (F. N. Hu et al, 2021; J. F. Liu et al, 2021; Yu et al, 2017). According to Equation , higher effective Hamaker constant will result in higher van der Waals attractive force between soil particles (Table S1).…”

Section: Discussionmentioning

confidence: 99%

“…The determination was according to the method of Tuller and Or (2005). The detailed determination procedures can also be found in our previous work (F. N. Hu et al, 2021). The A eff of Keshan and Binxian soils was 1.25 × 10 −19 J and 9.70 × 10 −20 J, respectively.…”

Section: Methodsmentioning

confidence: 99%

Effects of soil internal forces on splash detachment and transport of aggregate fragments in Mollisols of Northeast China

Ma¹,

Guo²,

et al. 2022

European J Soil Science

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Soil internal forces can affect aggregate breakdown, and then impact splash detachment and transport of aggregate fragments. However, currently, the processes of soil splash detachment and transport under different soil internal forces are still not fully understood. Thus, to determine the effects of soil internal forces on the splash transport process, two soils (Binxian soil and Keshan soil) in the Mollisols (black soil) of Northeast China were selected to analyse the detachment and transport characteristics of aggregate fragments under different splash distances (0-10, 10-20, 20-30, 30-40 and 40-50 cm) through simulated rainfall experiments. Different concentrations of KCl electrolyte (from 1 to 10 À5 mol L À1 ) were employed as rainfall materials to regulate soil internal forces. The results revealed that the net pressure of soil internal forces and splash amount presented the same trend with decreasing electrolyte concentration, that is, increased initially (from 1 to 10 À2 mol L À1 ), followed by levelling off (from 10 À2 to 10 À5 mol L À1 ). The splash amount and net pressure had an exponential relationship (p < 0.01). Under the same electrolyte concentration, Binxian soil had a higher net pressure and splash amount than Keshan soil. The splash amount for the two soils was mostly distributed at a splash distance of 0-20 cm, and it exponentially decreased with increasing splash distance (p < 0.01). An empirical expression in our study was developed to predict the splash amount (M) based on the net pressure (N) and splash distance (S). The size distribution of splashed aggregates could be affected by the net pressure of soil internal forces, the greater the net pressure, the smaller size aggregates splashed. At each splash distance, the highest mass percentage was observed for the fragments <0.053 mm and accounted for 35.5% to 82.1% of the total splash amount. This study provides valuable information to better understand the processes and mechanisms of rainfall splash erosion in the Chinese Mollisol region.Ren-tian Ma and Weizhen Guo contributed equally to this work.

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“…The addition proportions of modifiers were set to 0.5%, 1%, 1.5%, 2%, and 2.5% (v/v) with reference to other related research conclusions. 13,31 The composition of the substrate layer in the EGR experimental devices is shown in Table 2. All the EGR substrate layers had a volume weight of 2511.18 N m −3 , specific gravity of 1.31 and porosity of 80.51% in the initial stage.…”

Section: Experimental Devicementioning

confidence: 99%

Improvement in pollutant controlling performance by modified aggregate structure in extensive green roof substrate layer

Zhang

et al. 2022

Environ. Sci.: Water Res. Technol.

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Biochar application driven change in soil internal forces improves aggregate stability: Based on a two-year field study

Cited by 39 publications

References 91 publications

Long‐term biochar application governs the molecular compositions and decomposition of organic matter in paddy soil

Long‐term biochar application governs the molecular compositions and decomposition of organic matter in paddy soil

Effects of soil internal forces on splash detachment and transport of aggregate fragments in Mollisols of Northeast China

Improvement in pollutant controlling performance by modified aggregate structure in extensive green roof substrate layer

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