Characteristics of Flow Hydraulics and Soil Erosion in Maize and Potato Intercropping Systems

Ouyang, Chengren; Wu, Kaixian; Wu, Bozhi

doi:10.1007/s42729-022-00875-z

Cited by 2 publications

(1 citation statement)

References 39 publications

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“…Therefore, preventing and controlling groundwater pollution is of great significance for controlling non-point source pollution. Additionally, agricultural fertilizer use could be reduced [35], or alternatively, increasing vegetation cover would reduce nutrient loss on the slope surface [36]. This may help to mitigate the effects of rainfall on nitrogen and underground seepage in cultivated soils, thereby increasing yields and preventing pollution.…”

Section: Discussionmentioning

confidence: 99%

Rainfall Runoff and Nitrogen Loss Characteristics on the Miyun Reservoir Slope

Wang,

Jin

et al. 2024

Water

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Rainfall intensity and slope gradient are the main drivers of slope surface runoff and nitrogen loss. To explore the distribution of rainfall runoff and nitrogen loss on the Miyun Reservoir slopes, we used artificial indoor simulated rainfall experiments to determine the distribution characteristics and nitrogen migration paths of surface and subsurface runoff under different rainfall intensities and slope gradients. The initial runoff generation time of subsurface runoff lagged that of surface runoff, and the lag time under different rainfall intensity and slope conditions ranges from 3.97 to 12.62 min. Surface runoff rate increased with increasing rainfall intensity and slope gradient; compared with a rainfall intensity of 40 mm/h, at a slope of 15°, average surface runoff rate at 60 and 80 mm/h increased by 2.38 and 3.60 times, respectively. Meanwhile, the subsurface runoff rate trended upwards with increasing rainfall intensity, in the order 5 > 15 > 10°. It initially increased and then decreased with increasing slope gradient, in the order 5 > 10 > 15°. Total nitrogen (TN) loss concentration of surface runoff shows a decrease followed by a stabilization trend; the concentration of TN loss decreases with decreasing rainfall intensity, and the stabilization time becomes earlier and is most obvious in 5° slope conditions. TN loss concentration in subsurface runoff decreased with increasing rainfall intensity, i.e., 40 > 60 > 80 mm/h. The surface runoff rainfall coefficient was mainly affected by rainfall intensity, a correlation between αs and slope gradients S was not obvious, and the fitting effect was poor. The subsurface runoff rainfall coefficient was mainly affected by slope gradient, the R2 of all rainfall intensities was <0.60, and the fitting effect was poor. The main runoff loss pathway from the Miyun Reservoir slopes was surface runoff, which was more than 62.57%. At the same time, nitrogen loss was subsurface runoff, more than 51.14%. The proportion of surface runoff to total runoff increases with the increase of rainfall intensity and slope, with a minimum of 62.57%, and the proportion of nitrogen loss from subsurface runoff also decreases with increasing rainfall intensity but does not change with slope gradient. The order of different runoff modulus types was mixed runoff (surface and subsurface runoff occur simultaneously) > surface runoff > subsurface runoff. The surface and mixed runoff modulus increased significantly with increasing rain intensity under different rain intensities and slope gradients. Overall, rainfall intensity significantly affected slope surface runoff, and slope gradient significantly affected nitrogen loss.

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Section: Discussionmentioning

confidence: 99%

Rainfall Runoff and Nitrogen Loss Characteristics on the Miyun Reservoir Slope

Wang,

Jin

et al. 2024

Water

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Study on The Response of Yield to Photosynthetic Characteristics under Apple-Watermelon Combined Planting Mode

ZHANG,

Song-tao,

El-SAWY

et al. 2024

Preprint

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Agroforestry changes the traditional land use mechanism and has the advantage of intensive eco-economic compound. The photosynthetic characteristics of planting areas are the driving and restricting factors for the accumulation of plant material conversion. To investigate the response of the yield of apple-watermelon intercropping and the yield of fruit trees and crops to photosynthetic characteristics, the growth indexes, photosynthetic characteristics, yield, and benefits of single apple (CK1), single watermelon (CK2) and compound cropping modes were studied respectively. The results showed that the final growth indexes of intercropping apples were higher than those of the single model. However, due to the shading effect of high fruit trees on low crops, the normal growth of watermelon was inhibited, and the growth level of intercropping watermelon was lower than that of single mode. The Pn of apples and watermelons in different planting patterns showed a bimodal trend, and reached the peak value between 10:00–12:00 and 14:00–16:00. The daily variation curve of PAR showed an unimodal trend, and the peak value of apples and watermelons under the two planting patterns appeared between 12:00–14:00 and 10:00–12:00, respectively. Compound planting benefited apples from higher Pn and PAR, and vice versa for watermelon. The diurnal variation of Gs and Tr of intercropping and single species of apple and watermelon first increased and then decreased in an inverted V pattern, the diurnal variation trend of Ci showed a V pattern. The Gs, Tr, and Ci of apple in compound mode were higher than that of watermelon in single mode. The yield of apples increased by 46.34% in the combined apple-watermelon planting mode, and the yield of the combined planting mode was significantly higher than that of the single planting mode due to the advantage of the unit price of apples. In the apple-watermelon compound planting model, the total income was 5.19×105 yuan /hm2, the income of the single apple model was 2.46×105 yuan /hm2, and the income of the single watermelon model was 1.85×105 yuan /hm2. The land utilization rate was 232.20% and the income utilization efficiency was 210.98%.

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Characteristics of Flow Hydraulics and Soil Erosion in Maize and Potato Intercropping Systems

Cited by 2 publications

References 39 publications

Rainfall Runoff and Nitrogen Loss Characteristics on the Miyun Reservoir Slope

Rainfall Runoff and Nitrogen Loss Characteristics on the Miyun Reservoir Slope

Study on The Response of Yield to Photosynthetic Characteristics under Apple-Watermelon Combined Planting Mode

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