Identifying soil redistribution patterns by magnetic susceptibility on the black soil farmland in Northeast China

Liu, Liang; Zhang, Keli; Zhang, Zhuodong; Qianqian, Qiu

doi:10.1016/j.catena.2015.03.003

Cited by 63 publications

(19 citation statements)

References 20 publications

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“…Elevation ranges from 310 to 390 m, with long and gentle slopes. The slope length is up to 800-1500 m and the slope angle is generally between 1 • and 4 • [35,52]. The climate is the mid-temperate continental monsoon climate, with an annual average temperature of 0 • C and a large temperature difference between winter and summer.…”

Section: Study Areamentioning

confidence: 99%

Water Use Efficiency of Soybean under Water Stress in Different Eroded Soils

Xie

Liu

et al. 2020

Water

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Soil erosion could change the effective storage of soil moisture and affected crop water use efficiency (WUE). To quantitative study differences in the WUE of soybean and the crop’s response to water stress for soils with different degrees of erosion in northeastern China, three erosion degrees—(1) lightly, (2) moderately and (3) severely—eroded black undisturbed soils and four years (from 2013 to 2016) of soybean pot experiments were used to control soil water content (100%, 80%, 60%, and 40% field capacity (FC)) and observe the crop growth processes. To study the relationships between erosion–water use–productivity, the following results were achieved: (1) the optimal water content was 80% FC for lightly eroded soil (L) and 100% FC for both moderately (M) and severely (S) eroded soil. Yield (Y) was best in M with the value of 3.12 t ha−1, which was 4.6% and 85.5% higher than L and S, respectively. Under the conditions of adequate water supply, there was no significant change in Land M, but the values were significantly different for the S ( p < 0.05). (2) Y and biomass (B) were sensitive to water stress except in the branching stage. (3) The values of WUEY and WUEB for the three eroded soils were the best at 80% FC. The stress coefficient (SF) values of the three eroded soils were not significantly different. In the flowering and pod formation stage, the SF reached the maximum under waterlogging stress. While the water shortage stress reached the maximum in the seed filling stage, the soil water content decreased by 10%, and the WUEB decreased by 15%, which was 2.5 times more powerful than the waterlogging stress. This study indicated the change in soybean growth with respect to the water response caused by soil erosion, and provided a scientific basis and data for the reasonable utilization of black soil with different erosion intensities. The results also provided important parameters for the growth of simulated crops.

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Section: Study Areamentioning

confidence: 99%

Water Use Efficiency of Soybean under Water Stress in Different Eroded Soils

Xie

Liu

et al. 2020

Water

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“…The main textural classes of the topsoil are silt clay loam to clay loam, according to the USDA classification, with a sand content of 8-27%, a silt content of 29-66%, and a clay content of 26-40% (Wu et al 2008). The study site was originally covered by natural forests and pastures and began to be converted into cultivated lands, particularly on the gentlest slopes, due to the needs of a dramatically increasing population and expropriation by ranches in the 1950s (Liu et al 2015). In specific regard to the study site, soybean is the major crop, in rotation with wheat and corn.…”

Section: Study Sitementioning

confidence: 99%

Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China

Zhang

Wang

et al. 2019

Ecol Process

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Background: Although soil erosion plays a key role in the carbon cycle, a holistic and mechanistic understanding of the soil erosion process within the cycle is still lacking. The aim of this study was therefore to improve our mechanistic understanding of soil organic carbon (SOC) and soil respiration dynamics through an experiment conducted in an eroding black soil farmland landscape in Northeast China. Results: The depositional profiles store 5.9 times more SOC than the eroding profiles and 3.3 times more SOC than the non-eroding profiles. A linear correlation between the SOC and 137 Cs (Caesium-137) was observed in our study, suggesting that the SOC decreased with increased soil erosion. Furthermore, the fractions of intermediate C and the microaggregate C were lowest at the eroding position and highest at the depositional position. In the depositional topsoil, the input of labile materials plays a promotional role in soil respiration. Conversely, in the subsoil (i.e., below 10 cm), the potential mineralization rates were lowest at the depositional position-due to effective stabilization by physical protection within soil microaggregates. The field results of soil surface respiration also suggest that the depositional topsoil SOC is prone to be mineralized and that SOC at this depositional context is stabilized at subsoil depth. In addition, the high water contents at the depositional position can limit the decomposition rates and stabilize the SOC at the same time. Conclusions:The findings from this study support that a majority of the SOC at footslope is stored within most of the soil profile (i.e., below 10 cm) and submitted to long-term stabilization, and meanwhile support that the depositional profile emits more CO 2 than the summit due to its high amount and quality of SOC.

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“…This result agrees with the results of Zhang et al (2006), who pointed out that many eroded soil materials associated with runoff were redeposited on low-lying land. By using magnetic susceptibility measurements to quantify soil redistribution in the Northeast region of China, Liu et al (2015) indicated that the maximum soil deposition (25.1%) was observed at the footslope. This result could help to understand the unique soil erosion characteristics in the Chinese Mollisol region, where soil loss on hillslopes is severe, while river sediment delivery is relatively low (Fan et al, 2004).…”

Section: Contribution Of Rill Erosionmentioning

confidence: 99%

Inflow Rate Impact on Hillslope Erosion Processes and Flow Hydrodynamics

Zheng

Liu

et al. 2016

Soil Science Soc of Amer J

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Inflow water from upslope is an extremely important factor that influences downslope erosion processes. Little information is available concerning how inflow water affects downslope erosion processes in the Chinese Mollisol region, where a large amount of runoff is generated from upslope. The purpose of this study was to determine the effects of inflow rate on erosion processes and flow hydrodynamic parameters. A soil pan (10 m long, 1.5 m wide, and 0.5 m deep) was subjected to rainfall simulation and inflow experiments under one rainfall intensity (50 mm h −1), two slope gradients (5 and 10°), and five inflow rates (50, 100, 150, 200, and 300 L min −1). The result showed that when upslope inflow was included, soil loss increased 12 to 1950 times compared with no upslope inflow. When rill erosion dominated, rill erosion accounted for 52 to 90% of the total soil loss as the inflow rate increased from 50 to 300 L min −1. An increase in the inflow rate from 50 to 300 L min −1 caused the flow velocity to increase 0.6 to 7.8 and 1.7 to 12.9 times at 5 and 10° slopes, respectively, while the Darcy-Weisbach coefficient decreased from 13.5 to 95.4%. For sheet-dominated erosion, significant linear regressions were fitted between shear stress, stream power, unit stream power, and inflow rate; but for rill-dominated erosion, power functions were established between these flow hydrodynamic parameters and the inflow rate.

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Identifying soil redistribution patterns by magnetic susceptibility on the black soil farmland in Northeast China

Cited by 63 publications

References 20 publications

Water Use Efficiency of Soybean under Water Stress in Different Eroded Soils

Water Use Efficiency of Soybean under Water Stress in Different Eroded Soils

Soil erosion affects variations of soil organic carbon and soil respiration along a slope in Northeast China

Inflow Rate Impact on Hillslope Erosion Processes and Flow Hydrodynamics

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