| 水文条件对紫色土坡面土壤侵蚀及养分流失的影响 |
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| 引用本文： | 崔艳平,郑粉莉,刘雨.水文条件对紫色土坡面土壤侵蚀及养分流失的影响[J].中国水土保持科学,2009,7(1):1-7. |
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| 作者姓名： | 崔艳平 郑粉莉 刘雨 |
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| 作者单位： | 西北农林科技大学资源环境学院;中国科学院,水利部,水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,712100,陕西杨凌 |
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| 基金项目： | 国家重点基础研究发展计划，中国科学院西部行动计划 (二期)课题，西北农林科技大学创新团队建设计划 |
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| 摘 要： | 采用人工模拟降雨试验,研究水文条件对紫色土坡面土壤侵蚀及氮和磷养分流失的影响。试验处理包括2个施肥水平（低肥和高肥水平）,4个水文条件（自由下渗、土壤水分饱和、壤中流、壤中流＋降雨）和一个降雨强度（60 mm/h,历时60 min）。结果表明：壤中流＋降雨和土壤水分饱和条件下的土壤侵蚀量分别是自由下渗条件下的3.1和1.7倍,同自由下渗相比,壤中流、壤中流＋降雨和土壤水分饱和条件下,地表径流中NO3-N、HPO4-P的浓度和流失量有显著增加;低肥水平条件下,自由下渗、土壤水分饱和、壤中流和壤中流＋降雨地表径流中,NO3-N的浓度分别是0.88、58.90、698.41和87.80 mg/L,对应水文条件下地表径流中,HPO4-P的浓度分别是0.252、0.322、0.811和0.383 mg/L,高肥水平条件下,径流中的NO3-N和HPO4-P的浓度也有相同的趋势;土壤水分饱和条件下,地表径流中NO3-N和HPO4-P的流失量分别是自由下渗条件下的27～39和1.3倍,壤中流＋降雨条件下,地表径流中NO3-N和HPO4-P的流失量分别是自由下渗条件下的100～114和1.5～1.7倍,同时,壤中流＋降雨和土壤水分饱和条件下,泥沙中NO3-N和HPO4-P的流失量也比自由下渗条件下显著增加。
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| 关 键 词： | 水文条件 紫色土 壤中流 土壤侵蚀 养分流失 |
Effects of hydrological conditions on soil erosion and nutrient loss at purple soil hillslope |
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| Cui Yanping,Zheng Fenli,Liu Yu.Effects of hydrological conditions on soil erosion and nutrient loss at purple soil hillslope[J].Science of Soil and Water Conservation,2009,7(1):1-7. |
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| Authors: | Cui Yanping Zheng Fenli Liu Yu |
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| Institution: | Cui Yanping1,2,Zheng Fenli1,Liu Yu1,2(1.College of Resources and Environment,Northwest A & F University,2.State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau,Institute of Soil and Water Conservation,CAS & MWR: 712100,Yangling,Shaanxi,China) |
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| Abstract: | This paper quantitatively studied effects of hydrological conditions on soil erosion,nitrogen and phosphorus losses at purple soil hillslope by using of rainfall simulator.Experimental treatments included two levels of fertilizer input(low and high input) and four near-surface soil hydrological conditions(free infiltration;water saturation;subsurface flow without rainfall;and subsurface flow with rainfall).Rainfall intensity of 60 mm/h was simulated for 60 min.The results showed that soil loss of subsurface... |
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| Keywords: | hydrological conditions purple soil subsurface flow soil erosion nutrient loss |
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