Influence of Pinus Tabuleaefomis Forest on precipitation and Its Nutrient Content in Miyun Reservoir of Beijing City

XIAO Yang; CHEN Li-hua; YU Xin-xiao; YANG Xin-bing; SUN Qing-yang

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Influence of Pinus Tabuleaefomis Forest on precipitation and Its Nutrient Content in Miyun Reservoir of Beijing City

- Influence of Pinus Tabuleaefomis Forest on precipitation and Its Nutrient Content in Miyun Reservoir of Beijing City
- Bulletin of Soiland Water Conservation Vol. 26, Issue 5, Pages: 22-27(2007)
- 作者机构：
  
  北京林业大学水土保持学院, 北京林业大学教育部水土保持重点实验室,北京,100083
- 作者简介：
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- Published：2007
- 稿件说明：
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XIAO Yang, CHEN Li-hua, YU Xin-xiao, et al. Influence of Pinus Tabuleaefomis Forest on precipitation and Its Nutrient Content in Miyun Reservoir of Beijing City[J]. Bulletin of Soiland Water Conservation, 2007, 26(5): 22-27.
DOI：

XIAO Yang, CHEN Li-hua, YU Xin-xiao, et al. Influence of Pinus Tabuleaefomis Forest on precipitation and Its Nutrient Content in Miyun Reservoir of Beijing City[J]. Bulletin of Soiland Water Conservation, 2007, 26(5): 22-27. DOI：

摘要

对北京密云水库库西油松人工林的林冠截留、穿透降水和树干茎流的观测和分析结果表明

单次降雨过程中的林冠截留量与林外降水量呈幂函数关系

而穿透雨量和树干茎流量跟林外降水量皆呈线性相关关系

它们占林外降水的比例分别为7.23%～87.39%

12.56%～91.58%和0.007%～1.77%。环境状况、气象条件和降水特性的不同是造成同一地区大气降水化学性质差异的主要原因; 降水透过油松林冠层后

穿透降水和树干茎流中元素含量都有不同程度的增加。穿透降水中各元素含量变化均与降水时间间隔呈正相关

而与降雨强度和降水量呈负相关; 除N外

树干茎流中P

K元素含量与降水特性的关系与穿透降水的相同。

Abstract

A Pinus tabulaeformis plantation in western Miyun Reservoir of Beijing city was observed and ana-lyzed to study canopy interception

throughfall

and stemflow.Results showed that the relationship between the amounts of canopy interception and precipitation was the power function

but the relationship among throughfall

stemflow and precipitation displayed a linear correlation.Contributions of canopy interception

throughfall

and stemflow to total flux of rainfall were 7.23%～87.39%

12.56%～91.58% and 0.007%～1.77%

respectively. The differences of environmental aspect

meteorological condition

and characteristics of rainfall were a major factor which caused the discrepancy of atmospheric precipitation chemistry in the same area.When the precipitation passed through the canopy

the content of chemical elements in through-fall and stemflow increased in comparision with that of the precipitation.There was a positive correlation be-tween the individual element content in throughfall and the interval of precipitation

but a negative correla-tion with rainfall intensity and its amount. The correlation between the phosphorus and potassium contents in stemflow and characteristics of precipitation was the same as throughfall except for nitrogen element.

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