The potential for soil erosion control associated with socio-economic development in the hilly red soil region, southern China

Wang, L.; Yan, Hua; Wang, X.W.; Wang, Z.; Yu, Shuxia; Wang, Tianwei; Shi, Zhihua

doi:10.1016/j.catena.2020.104678

Cited by 48 publications

(17 citation statements)

References 45 publications

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“…In red soil, nitrogen loss is high due to local rainfall patterns and soil erosion 6 , 7 . Many researchers have reported that more precise control of the total amount of applied nitrogen fertilizer could be an important measure for decreasing soil nitrogen loss 8 , 9 and the apparent nitrogen balance (the positive or negative value calculated from nitrogen input minus nitrogen uptake).…”

Section: Introductionmentioning

confidence: 99%

The response of potato tuber yield, nitrogen uptake, soil nitrate nitrogen to different nitrogen rates in red soil

Liu

Zhong

et al. 2021

Sci Rep

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Nutrient-deficient red soil found in the southern region of China is increasingly being used for potato crops to meet the demand for this staple food. The application of nitrogen fertilizer is necessary to support the production of higher tuber yields; however, the links between nitrate nitrogen and the nitrogen balance in red soil are unknown. A field experiment was conducted in Jiangxi Province in 2017 and 2018 to determine the effects of different nitrogen application rates, 0 kg ha−1 (N0), 60 kg ha−1 (N60), 120 kg ha−1 (N120), 150 kg ha−1 (N150), 180 kg ha−1 (N180), 210 kg ha−1 (N210), and 240 kg ha−1 (N240, the highest rate used by local farmers), on potatoes growing in red soil. Data on tuber yield, crop nitrogen uptake, and the apparent nitrogen balance from the different treatments were collected when potatoes were harvested. Additionally, the content and stock of nitrate nitrogen at different soil depths were also measured. Nitrogen fertilization increased tuber yield but not significantly at application rates higher than 150 kg ha−1. We estimated that the threshold rates of nitrogen fertilizer application were 191 kg ha−1 in 2017 and 227 kg ha−1 in 2018, where the respective tuber yields were 19.7 and 20.4 t ha−1. Nitrogen uptake in potato in all nitrogen fertilization treatments was greater than that in N0 by 61.2–237% and 76.4–284% in 2017 and 2018, respectively. The apparent nitrogen surplus (the amount of nitrogen remaining from any nitrogen input minus nitrogen uptake) increased with increasing nitrogen application rates. The nitrate nitrogen stock at a soil depth of 0–60 cm was higher in the 210 and 240 kg ha−1 nitrogen rate treatments than in the other treatments. Moreover, double linear equations indicated that greater levels of nitrogen surplus increased the nitrate nitrogen content and stock in soils at 0–60 cm depths. Therefore, we estimate that the highest tuber yields of potato can be attained when 191–227 kg ha−1 nitrogen fertilizer is applied to red soil. Thus, the risk of nitrate nitrogen leaching from red soil increases exponentially when the apparent nitrogen balance rises above 94.3–100 kg ha−1.

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Section: Introductionmentioning

confidence: 99%

The response of potato tuber yield, nitrogen uptake, soil nitrate nitrogen to different nitrogen rates in red soil

Liu

Zhong

et al. 2021

Sci Rep

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“…The relative changes in the USLE_P conservation practice factor of the USLE in Table 2 were adopted from a calibrated SWAT model for this area (Chen et al, 2013), which maintained the same value over five years. The economic data for these BMPs were estimated by Wang (2008) according to the price standard adopted 15 years ago. Although this is no longer applicable to the current price standards, it is still suitable for evaluating the relative net cost among the BMP scenarios.…”

Section: Bmp Knowledge Basementioning

confidence: 99%

Optimizing the Implementation Plan of Watershed Best Management Practices with Time-varying Effectiveness under Stepwise Investment

Shen

Qin

Zhu

et al. 2023

Preprint

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Optimizing the spatial configuration of diverse best management practices (BMPs) can provide valuable decision-making support for comprehensive watershed management. Most existing methods focus on selecting BMP types and locations but neglect their implementation time or order in management scenarios, which are often investment-restricted. This study proposes a new simulation-optimization framework for determining the implementation plan of BMPs by using the net present value to calculate the economic costs of BMP scenarios and the time-varying effectiveness of BMPs to evaluate the environmental effectiveness of BMP scenarios. The proposed framework was implemented based on a Spatially Explicit Integrated Modeling System and demonstrated in an agricultural watershed case study. This case study optimized the implementation time of four erosion control BMPs in a specific spatial configuration scenario under a 5-year stepwise investment process. The proposed method could effectively provide more feasible BMP scenarios with a lower overall investment burden with only a slight loss of environmental effectiveness. Time-varying BMP effectiveness data should be gathered and incorporated into watershed modeling and scenario optimization to better depict the environmental improvement effects of BMPs over time. The proposed framework was sufficiently flexible to be applied to other technical implementations and extensible to more actual application cases with sufficient BMP data. Overall, this study demonstrated the basic idea of extending the spatial optimization of BMPs to a spatiotemporal level by considering stepwise investment, emphasizing the value of integrating physical geographic processes and anthropogenic influences.

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“…The economic data for these BMPs were estimated by X. Wang (2008) according to the price standard adopted 15 years ago. Although this is no longer applicable to the current price standards, it is still suitable for evaluating the relative net cost among the BMP scenarios.…”

Section: Experimental Designmentioning

confidence: 99%

Optimizing the Implementation Plan of Watershed Best Management Practices With Time‐Varying Effectiveness Under Stepwise Investment

Shen

Qin

Zhu

et al. 2023

Water Resources Research

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The potential for soil erosion control associated with socio-economic development in the hilly red soil region, southern China

Cited by 48 publications

References 45 publications

The response of potato tuber yield, nitrogen uptake, soil nitrate nitrogen to different nitrogen rates in red soil

The response of potato tuber yield, nitrogen uptake, soil nitrate nitrogen to different nitrogen rates in red soil

Optimizing the Implementation Plan of Watershed Best Management Practices with Time-varying Effectiveness under Stepwise Investment

Optimizing the Implementation Plan of Watershed Best Management Practices With Time‐Varying Effectiveness Under Stepwise Investment

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