Impacts of surface runoff and sediment on nitrogen and phosphorus loss in red soil region of southern China

Wu, Xinyang; Zhang, L. P.; Yu, Xingxiu

doi:10.1007/s12665-012-1635-x

Cited by 30 publications

(13 citation statements)

References 26 publications

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“…Soil erosion and leaching are among the major factors responsible for nutrient depletion from agricultural lands in humid tropical areas in Africa (Henao and Baanante, 1999). The rate of N and P loss due to erosion is often related to the rate of runoff and soil erosion (Wu et al, 2012). This study revealed that N and P loss was strongly related to the soil loss, in which the highest N (14 kg ha −1 ) and P (6.8 kg ha −1 ) values were from Dapo where the sediment loss was the highest (Table 5).…”

Section: N and P Exportmentioning

confidence: 78%

Linking soil erosion to on-site financial cost: lessons from watersheds in the Blue Nile basin

et al. 2015

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Abstract. The study was conducted in three watersheds (Dapo, Meja and Mizewa) in the Ethiopian part of the Blue Nile Basin to estimate the on-site cost of soil erosion using the productivity change approach, in which crop yield reduction due to plant nutrients lost with the sediment and runoff has been analysed. For this purpose, runoff measurement and sampling was conducted during the main rainy season of 2011 at the outlet of two to three sub-watersheds in each watershed. The sediment concentration of the runoff, and N and P contents in runoff and sediment were determined. Crop response functions were developed for the two plant nutrients based on data obtained from the nearest Agricultural Research Centres. The response functions were used to estimate crop yield reduction as a result of the lost N and P assuming there is no compensation through fertilization. The results show a significant yield reduction and resultant financial loss to the farmers. Considering only grain yield of maize (Zea mays), farmers at Dapo annually lose about USD 220 ha −1 and 150 ha −1 due to the loss of N and P, respectively. In view of the importance of the crop residues, including as feed, the loss can be even greater. The study demonstrated that in addition to the long-term deterioration of land quality, the annual financial loss suffered by farmers is substantial. Therefore, on farm soil and water conservation measures that are suitable in biophysical and socio-economic terms in the landscapes and beyond need to be encouraged.

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Section: N and P Exportmentioning

confidence: 78%

Linking soil erosion to on-site financial cost: lessons from watersheds in the Blue Nile basin

et al. 2015

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“…The sediment yield of the SC slope was only approximately 10% of that of the BL slope. Surface runoff is the driving force of soil erosion, and the amount of surface runoff directly influences the amount of sediment production during a rainfall event [12,21]. The vegetation coverage can reduce the kinetic energy of raindrops, increase water infiltration, reduce splash Surface runoff is the driving force of soil erosion, and the amount of surface runoff directly influences the amount of sediment production during a rainfall event [12,21].…”

Section: Runoff Yieldmentioning

confidence: 99%

“…Surface runoff is the driving force of soil erosion, and the amount of surface runoff directly influences the amount of sediment production during a rainfall event [12,21]. The vegetation coverage can reduce the kinetic energy of raindrops, increase water infiltration, reduce splash Surface runoff is the driving force of soil erosion, and the amount of surface runoff directly influences the amount of sediment production during a rainfall event [12,21]. The vegetation coverage can reduce the kinetic energy of raindrops, increase water infiltration, reduce splash erosion of the soil surface by raindrops and reduce the amount of splash-eroded surface through their leaves and stalks [23,51].…”

Section: Runoff Yieldmentioning

confidence: 99%

“…Therefore, reducing soil erosion on slopes is the key to soil and water conservation in the whole catchment. There are many factors affecting soil erosion process of slope lands, including rainfall intensity [10,16,17], soil types [18][19][20][21], vegetation coverage [22][23][24][25][26], soil moisture stages, slope, and tillage measurements. Overall, these factors can be classified into two categories: rainfall factors and underlying surface factors [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Runoff and Sediment Yields Under Different Crop and Tillage Conditions by Field Artificial Rainfall Experiments

Guo

Zhang

et al. 2019

Water

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Crop types and tillage measures on slopes have significant impacts on regional water and soil conservation. In this study, we investigated the influences of multiple crop types and tillage measures on water and sediment yields based on plot-scale experiments under artificial rainfall. The objective of the study is to find the best combination of crop type and tillage measure from the perspective of reducing soil erosion. We performed artificial rainfall experiments under eight slope treatments, which are the bare-land (BL, as a reference), peanut monoculture (PL), corn monoculture (CL), bare land (upper slope) mixed with peanut monoculture (lower slope) (BP), corn and peanut intercropping (TCP), corn and soybean intercropping (TCS), downslope ridge cultivation (BS) slope, and straw-mulched (SC), respectively. Under similar rainfall intensity and initial soil moisture conditions, these treatments except for BS efficiently reduced sediment yield compared to the BL slope. In comparison, the most effective slope treatment to reduce soil erosion is TCP, followed by PL and TCS. The amount of sediment yielded from the three treatments accounts for 0.4%, 2.0%, and 3.3% of the sediment yielded from BL. We recommend the three slope treatments as the preferred choices among eight treatments. Also, the lower sediment yield in the three slope treatments benefits from their higher vegetation coverage. Vegetation coverage plays a greater role in regulating sediment yield than the surface runoff at a plot scale.

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“…In recent years, runoff generation and soil loss from crops have been studied by researchers in the red soil region of China. Soil nutrient loss was reported as closely related to runoff generation (Wu et al, 2012). Plot monitoring illustrated that the average annual runoff and sediment generation from sloping croplands were much higher than those in reforested land (Huang et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Infiltration and Runoff Generation Under Various Cropping Patterns in the Red Soil Region of China

et al. 2015

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Soil and surface water runoff are the major causes of cropland degradation in the hilly red soil region of China. Appropriate tillage practices are urgently needed to reduce erosion and protect the soil surface. In this study, five tillage systems [manure fertiliser (PM), straw mulch cover (PC), peanut–orange intercropping (PO), peanut–radish rotation (PR) and traditional farrow peanut (PF)] were compared in terms of soil infiltration and the capacity to generate runoff. Based on field‐plot monitoring and simulated experiments, this study revealed that the organic content of the soil in the PO (19.43 g kg−1), PC (18·63 g kg−1) and PM (18·18 g kg−1) treatments increased compared with those of the PF (15·64 g kg−1) and PR (17.17 g kg−1) treatments. Moreover, the three tillage practices also enhanced the soil's aggregate stability and infiltration capacity. The average annual runoff generation rates of the treatments were as follows: PR (3,141 m3 ha−1 a−1) > PF (2,189 m3 ha−1 a−1) > PC (755 m3 ha−1 a−1) > PM (514 m3 ha−1 a−1) > PO (388 m3 ha−1 a−1). The PO treatment reduced the runoff generation rate by approximately 82·3% compared with that of the PF treatment. Among the treatments, the PO treatment had the highest threshold rainfall depth (22 mm) for runoff generation. Regression analysis revealed that the threshold rainfall depths linearly increased with the infiltration rates. The results of this study could benefit local soil management and cropland conservation. Copyright © 2015 John Wiley & Sons, Ltd.

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Impacts of surface runoff and sediment on nitrogen and phosphorus loss in red soil region of southern China

Cited by 30 publications

References 26 publications

Linking soil erosion to on-site financial cost: lessons from watersheds in the Blue Nile basin

Linking soil erosion to on-site financial cost: lessons from watersheds in the Blue Nile basin

Investigation of Runoff and Sediment Yields Under Different Crop and Tillage Conditions by Field Artificial Rainfall Experiments

Infiltration and Runoff Generation Under Various Cropping Patterns in the Red Soil Region of China

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