Effect of Contour Reverse Slope Terrace Preparation on Nitrogen and Phosphorus Transport in Sloping Cropland Under Natural Rainfall Conditions

Zhao Luyang; Wang Keqin; Jian Qinghong; Duan Xu; YangJiale; Zhao Yangyi

doi:10.13961/j.cnki.stbctb.2023.01.001

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Effect of Contour Reverse Slope Terrace Preparation on Nitrogen and Phosphorus Transport in Sloping Cropland Under Natural Rainfall Conditions

- Effect of Contour Reverse Slope Terrace Preparation on Nitrogen and Phosphorus Transport in Sloping Cropland Under Natural Rainfall Conditions
- Bulletin of Soiland Water Conservation Vol. 43, Issue 1, Pages: 1-7(2023)
- 作者机构：
  
  1. 西南林业大学生态与环境学院,云南,昆明,650224
  2. 云南省水土保持生态环境监测总站,云南,昆明,650106
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2023.01.001
  CLC： S157.1
- Published：2023
- 稿件说明：
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Zhao Luyang, Wang Keqin, Jian Qinghong, et al. Effect of Contour Reverse Slope Terrace Preparation on Nitrogen and Phosphorus Transport in Sloping Cropland Under Natural Rainfall Conditions[J]. Bulletin of Soiland Water Conservation, 2023, 43(1): 1-7.
DOI：

Zhao Luyang, Wang Keqin, Jian Qinghong, et al. Effect of Contour Reverse Slope Terrace Preparation on Nitrogen and Phosphorus Transport in Sloping Cropland Under Natural Rainfall Conditions[J]. Bulletin of Soiland Water Conservation, 2023, 43(1): 1-7. DOI： 10.13961/j.cnki.stbctb.2023.01.001.

摘要

[目的] 揭示等高反坡阶整地措施对于坡耕地产流产沙及面源污染物输出的规律，为源头控制坡耕地水土流失和农业面源污染提供科学依据和技术支撑。[方法] 以滇中昆明市松华坝迤者流域试验区内已布设等高反坡台阶措施的坡耕地(15°和22°)径流小区样地为对象，基于2019—2021年降雨、径流及水质数据，采用对比分析的方法，研究样地内的产流、产沙、面源污染物氮素、磷素输出的特征。[结果] 相同雨型下，研究区样地布设等高反坡阶之后坡度为22°的坡耕地比坡度为15°的坡耕地有更显著的减少坡面产流产沙以及面源污染物氮、磷输出的作用。[结论] 等高反坡阶对坡耕地的产流产沙及面源污染物的输出等有显著的控制效果

布设等高反坡阶能够有效地增加坡耕地尤其是坡度较大的坡耕地的保水保土能力。

Abstract

[Objective] The rules of land preparation measures on sediment production and non-point source pollutant output of sloping land were analyzed in order to provide a scientific basis and technical support for controlling soil and water loss and agricultural non-point source pollution of sloping land at the source. [Methods] The runoff plots of sloping farmland (15° and 22°) with equi-height reverse slope steps were taken as the research object in Songhuaba at Yizhe watershed experimental area of Kunming City

central Yunnan Province. Rainfall

runoff

and water quality data from 2019 to 2021 were analyzed using a comparative analysis method. The characteristics of flow production

sand production

and nitrogen and phosphorus output of surface source pollutants within the sample plots were studied. [Results] Contour reverse slope terraces used on sloping land with a slope of 22° had more significant effects on the reduction of slope flow and sand production

and the output of surface pollutants nitrogen and phosphorus than land with a slope of 15° under the same rainfall pattern. [Conclusion] Contour reverse slope terraces had significant control effects on sediment yield and non-point source pollutant output on sloping land

and can effectively increase soil and water conservation ability on sloping land

especially on large slopes.

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