Effects of biochar addition on soil hydraulic properties before and after freezing-thawing

Fu, Qiang; Zhao, Hang; Li, Tianxiao; Hou, Renjie; Liu, Dong; Ji, Yi; Zhou, Zhaoqiang; Yang, Liyan

doi:10.1016/j.catena.2019.01.008

Cited by 116 publications

(43 citation statements)

References 48 publications

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“…Usually, the water storage capacity of soil after biochar application increases with the number of medium and large aggregates and the soil pore size (30-75 μm) [65], and the…”

Section: Discussionmentioning

confidence: 99%

“…Usually, the water storage capacity of soil after biochar application increases with the number of medium and large aggregates and the soil pore size (30-75 µm) [65], and the pores in biochar itself can also store water. Fu et al [65] considered that the effect of the combined application of biochar and freeze-thaw cycling on soil water content was mainly achieved by reducing the proportion of micropores (<0.3 µm) in the soil layer and increasing the proportion of medium pores (>30-75 µm). Therefore, under the same natural conditions, the natural water content of the soil treated with biochar was higher than that of the untreated soil, and the soil water content at 1.8 and 3.6 • was significantly affected by biochar application.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Biochar on Soil and Water Loss on Sloping Farmland in the Black Soil Region of Northeast China during the Spring Thawing Period

et al. 2021

Sustainability

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Biochar, as a kind of soil amendment, has attracted wide attention from scholars in various countries, and the effects of biochar on soil and water loss have been well reported. However, soil erosion is significantly affected by geographical conditions, climate, and other factors, and research on the characteristics of soil erosion and the effects of biochar application in seasonally frozen soil areas is currently unclear. The purpose of this study was to explore the effect of corn straw biochar application on soil and water conservation during the spring thawing period. Specifically, through field experiments, the addition of 0, 6, and 12 kg m−2 biochar on slopes of 1.8, 3.6, 5.4, and 7.2° and the effects on runoff and the soil erosion rate of farmland were analyzed. The results showed that in the 6 and 12 kg m−2 biochar addition treatments, the saturated water content of the soil increased by 24.17 and 42.91%, and the field capacity increased by 32.44 and 51.30%, respectively. Compared with the untreated slope, with an increase in biochar application rate, runoff decreased slightly, and soil erosion decreased significantly. This study reveals that biochar can be used as a potential measure to prevent soil and water loss on sloping farmland in cold regions.

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“…Usually, the water storage capacity of soil after biochar application increases with the number of medium and large aggregates and the soil pore size (30-75 μm) [65], and the…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of Biochar on Soil and Water Loss on Sloping Farmland in the Black Soil Region of Northeast China during the Spring Thawing Period

et al. 2021

Sustainability

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“…By using Equations (5), (6), and (9), we could calculate hyperbolic model parameters a and b. According to Equation (6), the calculated results could be drawn in a stress-strain diagram, and we compared them with the experimental stress-strain curves.…”

Section: Model Validationmentioning

confidence: 99%

“…Changes in soil structure during the freezing process do not completely recover as the temperatures rises [2]. Under the effect of repeated FTCs, the soil structure is repeatedly adjusted, so its physical and mechanical properties are changed, such as porosity [3,4], severity [5], hydrologic properties [6], permeability [7,8], and strength and deformation [9]. Thus, soil mechanical properties are key considerations in construction projects in cold areas.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Freeze-Thaw Cycles on the Mechanical Properties and Parameters of the Duncan-Chang Constitutive Model of Remolded Saline Soil in Nong’an County, Jilin Province, Northeastern China

et al. 2019

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In seasonally frozen areas, physical and mechanical soil properties change dynamically under the effect of the freeze-thaw cycles (FTCs), which is a problem that cannot be ignored in geotechnical engineering. In order to study the effect of the FTC on the strength and the mechanism of deformation and failure of saline soil, this paper took Nong’an saline soil as the research object. In total, 105 groups of remolded samples with different salt contents (S) after FTCs were examined in unconsolidated-undrained tests. On the basis of the experiment results, the influence of FTCs on the mechanical properties of Nong’an saline soil was analyzed. The failure principal stress difference (σ1 − σ3)f and cohesion (c) were both decreased with FTC. This occurred especially rapidly after the first cycle and became stable between 30 and 60 cycles. The internal friction angle φ increased at first and then decreased. According to experimental data, a modified Duncan-Chang model was established. Compared with the experiment results, this model was reasonable to simulate the stress-strain relationship of Nong’an saline soil. Furthermore, the empirical formulas of Duncan-Chang model parameters were obtained by regression analysis. This provides a theoretical basis for saline–soil foundation and subgrade engineering in seasonal frozen areas.

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“…This situation may become widespread in the future because of fresh water scarcity, population growth, urbanization, and increasing food demands [3]. Although wastewater irrigation can provide nutrients for soil development and boost agricultural productivity [4], it leads to the accumulation of soil contaminants, such as trace metals (TMs) and toxic chemicals [5], which may have considerably negative effects on the growth of crops and even threaten the health of humans and livestock through the food chain process [6,7,8,9]. In addition, numerous soil properties, such as soil pH, organic matter (OM) content, cation exchange capacity (CEC), soil redox potential, and enzyme activity, can be potentially affected by long-term wastewater irrigation [10,11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Biouptake Responses of Trace Metals to Long-Term Irrigation with Diverse Wastewater in the Wheat Rhizosphere Microenvironment

Zhang

et al. 2019

IJERPH

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Wastewater irrigation is widely practiced and may cause serious environmental problems. However, current knowledge on the effects of long-term irrigation with wastewater from different sources on the biouptake of trace metals (TMs) in the rhizosphere zone by plants in farmlands is limited. Here, we analyzed wheat rhizosphere soil and wheat roots collected from a typical wastewater irrigation area in North China to evaluate the influence of wastewater irrigation from different sources on the bioavailability of trace metals in soils. Results showed that irrigation with tanning and domestic wastewater helped enhance the bioavailability of trace metals in rhizosphere soil by increasing the active organic carbon content, soil redox potential, and catalase activity, thus enhancing the proportion of the potentially bioavailable part of trace metal speciation. Conversely, irrigation with pharmaceutical wastewater can reduce the bioavailability of trace metals in rhizosphere soil by increasing total soil antibiotics and thus decreasing the proportions of bioavailable and potentially bioavailable parts of trace metal speciation. These findings can provide insights into the migration and transformation of trace metal speciation in soil rhizosphere microenvironments under the context of wastewater irrigation.

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Effects of biochar addition on soil hydraulic properties before and after freezing-thawing

Cited by 116 publications

References 48 publications

Effect of Biochar on Soil and Water Loss on Sloping Farmland in the Black Soil Region of Northeast China during the Spring Thawing Period

Effect of Biochar on Soil and Water Loss on Sloping Farmland in the Black Soil Region of Northeast China during the Spring Thawing Period

The Influence of Freeze-Thaw Cycles on the Mechanical Properties and Parameters of the Duncan-Chang Constitutive Model of Remolded Saline Soil in Nong’an County, Jilin Province, Northeastern China

Biouptake Responses of Trace Metals to Long-Term Irrigation with Diverse Wastewater in the Wheat Rhizosphere Microenvironment

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