Effect of straw addition on soil infiltration characteristics and model-fitting analysis

Wang, Xiaoyu; Yang, Kan; Zheng, Jian

doi:10.1007/s12517-019-4539-1

Cited by 6 publications

(4 citation statements)

References 32 publications

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“…of water into the soil is predominantly associated with the configuration of soil pores. Notably, the pore structure within the straw layer exhibits non-homogeneity, which contrasts with the characteristics of homogeneous soil [33]. The discontinuity between straw and soil causes it to become more difficult for soil moisture to reach the heat required for evaporation, and the rate of evaporative loss of soil moisture is consequently slowed down.…”

Section: Effect On Soil Water Evaporationmentioning

confidence: 99%

Effect of Straw Mulching and Deep Burial Mode on Water and Salt Transport Regularity in Saline Soils

Li,

Wang,

Wang

et al. 2023

Water

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To examine the impacts of various straw mulching techniques, this study used the indoor soil column test as the primary research method and the field test as the validation test on the salinity dynamics of saline and alkaline soils. The experiment in this study was designed with five treatments: SC means for straw covered on the soil surface; DB means for straw buried 40 cm below the soil surface; S1D1, S2D1, and S1D2 represent the ratio of soil surface cover to the amount of straw buried 40 cm below the soil surface as 1:1, 2:1, and 1:2, respectively. The results of the indoor soil column test showed that all kinds of straw mulching techniques could effectively reduce soil moisture evaporation, and the straw mulching and deep burial mode was more effective: after 45 days of evaporation, compared with that of CK, the cumulative evaporation of soil moisture were reduced by 29.61%, 27.49%, 37.87%, 65.85%, and 54.58% for SC, DB, S1D1, S2D1, and S1D2, respectively; the straw mulching and deep burial mode could reduce the soil evaporation intensity more effectively than the single-layer straw mulching mode: the mean soil evaporation rates of CK, SC, DB, S1D1, S2D1 and S1D2 after 45 days of evaporation were 1.27 mm/day, 0.90 mm/day, 0.92 mm/day, 0.80 mm/day, 0.43 mm/day, and 0.58 mm/day; various straw mulching techniques could inhibit the accumulation of salts in the surface soil and effectively regulate the distribution of salts in the soil profile, among which the straw mulching and deep burial mode had the best effect of salinity suppression: after 30 days of evaporation, the re-salinization levels of the 0–40 cm soil layer of SC, DB, S1D1, S2D1, and S1D2 were reduced by 66.78%, 43.08%, 33.95%, 92.04% and 45.94% compared with that in the CK, respectively; there was a significant positive correlation between cumulative evaporation of soil moisture and cumulative soil salinity, which implied that cumulative soil salinity increased with the increase in cumulative evaporation of soil moisture. The results of the field experiment justified the results of the indoor soil column test: after four months of evaporation, the field moisture contents of CK, SC, DB, S1D1, S2D1, and S1D2 in the 0–20 cm soil layer were 14.77%, 3.51%, 15.10%, 15.26%, 18.73%, and 2.94%, respectively; during the experimental period, the salt inhibition rate of SC, DB, S1D1, S2D1 and S1D2 in 0–20 cm soil layer were 35.46%, 44.76%, 50.98%, 54.80% and 37.30%, respectively. Therefore, in a comprehensive view, S2D1 treatment had the best effect of salt and vapor suppression on saline soil. This study is of great significance for the resource utilization of straw waste, the improvement of water utilization and efficiency, and the management of soil salinization.

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Section: Effect On Soil Water Evaporationmentioning

confidence: 99%

Effect of Straw Mulching and Deep Burial Mode on Water and Salt Transport Regularity in Saline Soils

Li,

Wang,

Wang

et al. 2023

Water

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“…The modified soil has excellent soil water-holding capacity. Several researchers, including Khan, Hamid, and Bashir [ 16 , 17 , 18 ], have used different organic amendments to amend soil contaminated with cadmium (Cd). It was shown that organic amendments going through adsorption and complexation reactions could mitigate Cd contamination.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Ameliorants on the Infiltration and Decontamination Capacities of Soil

et al. 2023

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The expansion of urban construction areas can reduce the infiltration rate of rainwater in permeable land, and a large amount of runoff rainwater cannot penetrate the soil. In extreme rainstorm weather, it is easy to cause serious urban waterlogging problems. To improve the infiltration and decontamination ability of green space soil, two types of inorganic ameliorants (i.e., sand and grain shell) and structural ameliorants (i.e., desulfurization gypsum and polyacrylamide) were utilized as amendments in the soil. The influence of the selected ameliorants on the infiltration and decontamination ability was analyzed through a soil infiltration test, soil pore distribution determination and a soil decontamination test. Three parameters including the soil infiltration rate, pore distribution characteristics and pollutant removal rate were proposed. The results showed that sand, grain shells and desulfurization gypsum (FGD gypsum) all enhanced the infiltration capacity of soil, while PAM decreased the infiltration capacity. Meanwhile, mixed sand and grain shell with the FGD gypsum and polyacrylamide can effectively improve the decontamination capacity of the soil. Comprehensive analysis showed that the better improvement combination is 10% sand + 20% grain hull + 0.5 g/kg FGD gypsum + 0.1 g/kg PAM.

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“…Therefore, researchers have developed many methods for the determination of SWCC (Ishimwe et al 2014;Haghverdi et al 2018), among which the centrifugal method is the most widely used. Although the operation is simple, the density change and centrifugal time in the centrifugal process have certain effects on measurement results, so measured parameters often have low accuracy (Sun et al 2019;Wang et al 2019a). Wang et al (2020) compared and evaluated the van Genuchten model, Brooks-Corey model, lognormal distribution model and the residual film SWCC estimation model based on improved pore size distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Indirect methods are based on the basic properties of soil, and use some empirical or semi-empirical relationship to establish an SWCC prediction method, the main three being: pedotransfer function (Wang et al 2019b); physical empirical method (Zeiliguer et al 2000); and the fractal method (Perfect 1999). Wang et al (2017Wang et al ( , 2019a explored the effects of ammoniated straw and inorganic changes on SWCCs and soil water holding capacity. Stoof et al (2010) evaluated the effect of the addition of ash on soil water retention.…”

Section: Introductionmentioning

confidence: 99%

Prediction of soil water characteristic curves based on low suction section and inflection point

Zhao

et al. 2022

Water Supply

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Given the cumbersome determination method of Soil Water Characteristic Curve (SWCC), the collapsible loess (silty clay loam) in Lanzhou was taken as the research object to explore the method of symmetrical prediction of SWCC in the low suction section on the inflection point, and determine the optimal suction section and the inflection point. The results showed that in the range of 0–7,000 cm suction, the spatial variation coefficient (CV) of soil saturation of each bulk density increased with the increase of suction. Soil saturation showed weak spatial variability when suction <800 cm, and moderate spatial variability when suction ≥800 cm. Using a bulk density of 1.58 g/cm3 as an example, taking the bulk density of 1.58 g/cm3 as an example, the SWCC determined by the symmetry of the bending point was compared with the measured data of 0–300, 0–500, 0–800 and 0–1,000 cm suction sections. It was found that the measured soil saturation of SWCC determined by the data of 0–800 cm suction section was the highest consistent with the predicted value. The measured and predicted saturation points of the SWCC were most consistent with suction segments of 0–800 cm. SWCC data of different textures and bulk density were used to verify the prediction method of SWCC at low suction section and inflection point of 0–800 cm. It was found that the average absolute error and root mean square error of statistical indicators were close to 0, and the correlation coefficient was greater than 0.9915. The actual and predicted values of each soil parameter were linearly correlated. This method of predicting SWCCs with low suction and inflection points ensures both a high degree of curve fitting and the accuracy of characteristic soil parameters, providing a simple method for the prediction of SWCCs and guidance for managing soil water in loessial areas.

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Effect of straw addition on soil infiltration characteristics and model-fitting analysis

Cited by 6 publications

References 32 publications

Effect of Straw Mulching and Deep Burial Mode on Water and Salt Transport Regularity in Saline Soils

Effect of Straw Mulching and Deep Burial Mode on Water and Salt Transport Regularity in Saline Soils

Effect of Different Ameliorants on the Infiltration and Decontamination Capacities of Soil

Prediction of soil water characteristic curves based on low suction section and inflection point

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