Characteristics of Soil Phosphorus Export by Surface Runoff from Gentle Slope in Yanghe Watershed

CUI Li-tuo; LI Zhi-wei

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Characteristics of Soil Phosphorus Export by Surface Runoff from Gentle Slope in Yanghe Watershed

更新时间：2024-11-07

- Characteristics of Soil Phosphorus Export by Surface Runoff from Gentle Slope in Yanghe Watershed
- Vol. 20, Issue 3, Pages: 10-12(2006)
- 作者机构：
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  CLC： S157.1S158.3
- Published：2006
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CUI Li-tuo, LI Zhi-wei. Characteristics of Soil Phosphorus Export by Surface Runoff from Gentle Slope in Yanghe Watershed[J]. 2006, 20(3): 10-12.
DOI：

CUI Li-tuo, LI Zhi-wei. Characteristics of Soil Phosphorus Export by Surface Runoff from Gentle Slope in Yanghe Watershed[J]. 2006, 20(3): 10-12. DOI：

摘要

坡面径流和侵蚀泥沙是磷素进入洋河水库的主要非点污染源。根据洋河流域多年的降雨特点，通过对天然降雨资料分析和人工模拟降雨，对该流域缓坡地表径流中磷素输出进行了初步的研究，结果表明；洋河流域缓坡地土壤磷素流失以颗粒态磷为主，不同土地利用方式下洋河流域缓坡地地表径流中不同形态磷含量的大小顺序为：小麦-玉米连作地〉高产玉米地〉低产玉米地〉次生灌木林地；随着降雨强度的增加．径流中颗粒态磷的含最逐渐增加，但Ortho-P的含量却下降；不同植被覆盖度下坡面地表径流中颗粒态磷和TP的含量．随着植被覆盖虚增大而减少，但径流中Ortho-P的含量则随着覆盖度的增加而增加。

Abstract

Runoff and soil losses from agricultural fields were investigated as the major non-point sources of phosphorus entering Yanghe reservoir.According to rainfall characteristics of Yanghe watershed in recent years

the phosphorus export by surface runoff from gentle slope was studied under simulated rainfall and analyzed rainfall data conditions.The results showed that the soil phosphorus losses of Yanghe watershed relied mainly on particulate phorphours;the content of different forms phosphorus of surface rainfall in Yanghe watershed was wheat-corn continuous cropping>high-yield cron cropping>low-yield corn cropping>secondary shrub;with the increase of rainfall intensity

the content of particulate phosphorus increased slowly but that of ortho-P decreased;with the plant cover degree increasing

the content of particulate phosphorus and TP of surface runoff decreased slowly but that of ortho-P increased slowly.

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