[1]DONG Wencai,LI Lin,FU Qiang.Study on Migration of Nitrate-Nitrogen in Runoff and Inerflow During Rainfall Event in Black Soil Area[J].Research of Soil and Water Conservation,2021,28(02):1-6.
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Study on Migration of Nitrate-Nitrogen in Runoff and Inerflow During Rainfall Event in Black Soil Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
1-6
Column:
Public date:
2021-02-06
- Title:
- Study on Migration of Nitrate-Nitrogen in Runoff and Inerflow During Rainfall Event in Black Soil Area
- Keywords:
- black soil area; farmland; runoff; interflow; nitrate nitrogen
- CLC:
- S152.7; TV121+.1
- DOI:
- -
- Abstract:
- In order to study migration of soil nitrate nitrogen in runoff and interflow in sloping farmland in black soil area, field in-situ monitoring experiments were carried out to reveal the characteristics of nitrate nitrogen migration driven by runoff and interflow under the influence of maize root system and plough pan. The results show that the rainfall characteristics have a significant effect on the surface runoff of sloping farmland in black soil area, and the runoff process shows a variable course; under different rainfall conditions, the nitrate nitrogen migration in surface runoff presented the same three stages of rise, fall and gentleness; the rise stage reached its peak after about 4 minutes and began to decline, and it tended to be gentle after 12 minutes; under different rainfall characteristics of sloping farmland in the black soil area, the growth and regression processes of interflow were the same; the rapid growth stage lasted about 6 minutes, with the cumulative flow rate of 9.0 ml/m, and the rapid regression stage lasted about 14 minutes, with the cumulative flow rate of 21.2 ml/m; in the intermediate stable stage, the runoff intensity of interflow was 6 ml/(min·m), the nitrate migration intensity was about 0.09 mg/(min·m)in the stable stage of soil flow, and the average cumulative migration was 0.20 mg/m and 0.25 mg/m in the rising and subsiding stages; the total interflow(nitrate)was equal to the sum of the flows in the rise and fall sections plus the product of interflow duration and the peak of interflow(nitrate). The errors between the two calculated and the measured interflow(nitrate)were 0.7, 2.4%(1.2, 11.8%), with high accuracy, indicating that the calculation method was feasible.
- References:
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Last Update:
2021-02-10