| 天然降雨条件下等高反坡台阶整地对坡耕地氮磷输移的影响 |
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| 引用本文： | 赵露杨,王克勤,蹇清洪,段旭,杨佳乐,赵洋毅.天然降雨条件下等高反坡台阶整地对坡耕地氮磷输移的影响[J].水土保持通报,2023,43(1):1-7,31. |
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| 作者姓名： | 赵露杨 王克勤 蹇清洪 段旭 杨佳乐 赵洋毅 |
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| 作者单位： | 西南林业大学 生态与环境学院, 云南 昆明 650224;云南省水土保持生态环境监测总站, 云南 昆明 650106 |
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| 基金项目： | 云南省基础研究计划面上项目“水文条件影响下的坡耕地红壤分形结构对土壤酸化临界负荷的作用机制研究”(202001AT070136)；国家自然科学基金项目“砷胁迫高原湖滨湿地典型植物根系分泌物对磷形态转化的影响机制”(31760149)；云南省青年人才项目(YNWR-QNBJ-2019-215,YNWR-QNBJ-2019-226)。 |
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| 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。
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| 关 键 词： | 反坡阶 坡耕地 产流产沙 氮、磷输出 削减率 |
| 收稿时间： | 2022/3/8 0:00:00 |
| 修稿时间： | 2022/6/30 0:00:00 |
Effect of Contour Reverse Slope Terrace Preparation on Nitrogen and Phosphorus Transport in Sloping Cropland Under Natural Rainfall Conditions |
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| Zhao Luyang,Wang Keqin,Jian Qinghong,Duan Xu,YangJiale,Zhao Yangyi.Effect of Contour Reverse Slope Terrace Preparation on Nitrogen and Phosphorus Transport in Sloping Cropland Under Natural Rainfall Conditions[J].Bulletin of Soil and Water Conservation,2023,43(1):1-7,31. |
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| Authors: | Zhao Luyang Wang Keqin Jian Qinghong Duan Xu YangJiale Zhao Yangyi |
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| Institution: | School of Ecology and Environment, Southwest Forestry University, Kunming, Yunnan 650224, China;Yunnan Provincial Soil and Water Conservation Ecological Environment Monitoring Station, Kunming, Yunnan 650106, China |
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| 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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| Keywords: | reverse slope terrace sloping farmland erosion and sand production nitrogen and phosphorus output reduction rate |
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