Rice straw cover decreases soil erosion and sediment-bound C, N, and P losses but increases dissolved organic C export from upland maize fields as evidenced by δ13C

Park, Se-In; Yang, Hang; Park, Hyun-Jin; Seo, Bo-Seong; Jeong, Young-Jae; Lim, Sang-Sun; Kwak, Jin‐Hyeob; Kim, Han-Yong; Yoon, Kwang‐Sik; Lee, Sang-Mo; Choi, Woo‐Jung

doi:10.1016/j.scitotenv.2020.142053

Cited by 38 publications

(22 citation statements)

References 54 publications

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“…Therefore, after removing the straw, the impact of raindrops on the soil and the runoff increased, resulting in more significant soil erosion. Park et al [37] also reported the same conclusion. The decrease in SOC (see Figure 4) caused by straw removal may also be the reason for the increased soil erosion.…”

Section: Yieldsupporting

confidence: 57%

“…Our results showed that soil loss increased with the increasing straw removal rate. Crop residue mulch reduced the direct impact of raindrops by providing surface protection and reduced water flow by increasing the surface roughness of the soil, thereby reducing runoff [37]. Therefore, after removing the straw, the impact of raindrops on the soil and the runoff increased, resulting in more significant soil erosion.…”

Section: Yieldmentioning

confidence: 99%

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The Crop Residue Removal Threshold Ensures Sustainable Agriculture in the Purple Soil Region of Sichuan, China

Zhang

Ren³

et al. 2021

Sustainability

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Sichuan, a hilly area in southwestern China, is recommended as a bioethanol production base because of its abundant crop residue resources. However, removing the crop straw for bioethanol may negatively affect soil fertility and productivity due to the local purple soil vulnerability. To explore the impact of crop residue removal on soil fertility and productivity and meet the needs of sustainable agriculture, we conducted a crop residue removal experiment by measuring the soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) contents, and crop yield in the purple soil region in southwest China. Soil erosion was also simulated by Revised Universal Soil Loss Equation version 2 (RUSLE 2). The results showed that soil erosion increased with the increase of the straw removal rate. Compared with 0% removal treatment, the SOC content reduced at other removal rate treatments, especially for long-term residue removal. The effect of residue removal on soil TN and TP was not consistent within one year. After two years, residue removal greater than 25% caused a decrease in TN by 1.6–3.7%, and straw removal greater than 50% caused a TP decrease by 8.5–9.3%. More than 25% of the residue removed reduced maize and canola yields, and TN and TP content. However, all crop residue removal treatments resulted in SOC content reduction and soil erosion deterioration. In conclusion, crop residue removal was not recommended due to agricultural sustainability in Sichuan, China.

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Section: Yieldsupporting

confidence: 57%

Section: Yieldmentioning

confidence: 99%

The Crop Residue Removal Threshold Ensures Sustainable Agriculture in the Purple Soil Region of Sichuan, China

Zhang

Ren³

et al. 2021

Sustainability

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“…For example, it can increase pest and disease pressure [9]. Rice straw cover can increase dissolved organic carbon loss from the plots, which may impose negative impacts on the soil environment and groundwater [10]. Rice straw amendment (1% w/w) can increase methylmercury levels in wheat (by 225%) and rice (by 20%) grains in Hg-contaminated paddy soil [11].…”

Section: Introductionmentioning

confidence: 99%

Impacts of crop residues on soil health: a review

Chen

Huang

et al. 2021

Environmental Pollutants and Bioavailability

103

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“…In post-harvest rice processing, rice straw picking, bundling as well as returning are important links in modern agriculture [1][2][3] . Studying the interaction of rice straw-rice straw and rice straw-agricultural machinery parts is a basic scientific issue in the development and improvement of rice post-harvest processing equipment [4][5][6][7] . In recent years, the simulation analysis technology of discrete element method (DEM) receives great attention in the design and improvement of agricultural machinery parts.…”

Section: Introduction mentioning

confidence: 99%

Contact parameter analysis and calibration in discrete element simulation of rice straw

Hu¹,

Deng²,

Deng³

et al. 2021

International Journal of Agricultural and Biological Engineering

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Discrete element method was used to study and analyze the interaction between rice straws and between rice straw and agricultural machinery parts, thereby providing a scientific basis for post-harvest paddy field processing. Calibrations of rice straw-rice straw, rice straw-agricultural machinery part contact parameters (collision recovery coefficient, static friction coefficient and rolling friction coefficient) constitute an important prerequisite for the discrete element research process. In this study, the collision recovery coefficients of rice straw-steel and rice straw-rice straw were 0.230 and 0.357, respectively, which were calibrated by the collision method. The static friction coefficient and rolling friction coefficient of rice straw-steel were 0.363 and 0.208 respectively, which were calibrated by the inclined plate method and the slope method. The static friction coefficient and rolling friction coefficient of rice straw-rice straw were 0.44 and 0.07, respectively, which were calibrated by the split cylinder method. The paired t-test showed insignificant differences between calibration parameter simulation results and the physical test values (p>0.05). Taking the angle of repose that reflecting rice straw flow and friction characteristics as the evaluation index, the verification tests of the above calibration values indicated that the simulated angle of repose has no significant difference from the physical test value (p>0.05). The side plate lifting test on rice straw of different lengths showed no significant difference between the simulated angle of repose and the physical test value (p>0.05). This study can provide a basis for contact parameters choice in discrete element simulation analysis with rice straw-rice straw and rice straw-agricultural machinery parts as the research object. The calibration method can provide a reference for the contact parameter calibration of other crop straws.

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Rice straw cover decreases soil erosion and sediment-bound C, N, and P losses but increases dissolved organic C export from upland maize fields as evidenced by δ13C

Cited by 38 publications

References 54 publications

The Crop Residue Removal Threshold Ensures Sustainable Agriculture in the Purple Soil Region of Sichuan, China

The Crop Residue Removal Threshold Ensures Sustainable Agriculture in the Purple Soil Region of Sichuan, China

Impacts of crop residues on soil health: a review

Contact parameter analysis and calibration in discrete element simulation of rice straw

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