[1]CHEN Xufei,LIU Tong,CHENG Jiong,et al.Effect of Grass Filter Strips on Runoff, Sediment and Phosphorus from Vegetable Field and Influence Factors Under Simulated Experiment in Southern China[J].Research of Soil and Water Conservation,2019,26(02):377-383.
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Effect of Grass Filter Strips on Runoff, Sediment and Phosphorus from Vegetable Field and Influence Factors Under Simulated Experiment in Southern China
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 02
Page number:
377-383
Column:
Public date:
2019-04-28
- Title:
- Effect of Grass Filter Strips on Runoff, Sediment and Phosphorus from Vegetable Field and Influence Factors Under Simulated Experiment in Southern China
- CLC:
- S157;P333;S153
- DOI:
- -
- Abstract:
- Ecological engineering measures have been suggested to control the loss of pollutants by regulating the material balance and material flow in the agricultural ecosystem. The effects of grass filter strips on surface runoff, sediment, and phosphorus under different rain intensities and slope gradients were evaluated. Compared with the case of using no grass, on average, Vetiveria zizanioides grass vegetation reduced soil loss by 16.00%～70.38%, overland flow by 12.18%～43.11%, and phosphorus by 27.53%～49.35%, respectively. A comparison between the two different rain intensities revealed that under the intensity of 210 mm/h rain, the losses of runoff and sediment in the filtrate zone of Vetiveria zizanioides with 2 slopes showed the decreasing trend, and all reached the significant level (p<0.05). The decrease of total phosphorus loss in the filter zone of Vetiveria zizanioides was significantly higher than that of the bare slope under 210 mm/h rain intensity, and there was a significant difference in the loss between different slopes. In general, interception efficiency was related to the width, and gradually increased with increase of width. As the width reached 2 m, the interception had the significant effect. Using the optimal scaling in SPSS, we evaluated the comparative importance of rain intensities, slope gradient and width. Their contributions decreased in the order: rain intensities > width > slope gradient. The results confirmed that the main controlling factor was rain intensity, and the width could also play the positive role in losses of runoff, sediment and total phosphorus.
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1900-01-01