Characteristics of Soil N and P Accumulation and Their Loss Risk in Songhuaba Reservoir

LIU Fang; ZHANG Nai-ming

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Characteristics of Soil N and P Accumulation and Their Loss Risk in Songhuaba Reservoir

- Characteristics of Soil N and P Accumulation and Their Loss Risk in Songhuaba Reservoir
- Bulletin of Soiland Water Conservation Vol. 26, Issue 3, Pages: 32-35(2007)
- 作者机构：
  
  云南农业大学资源与环境学院,云南,昆明,650201
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- Published：2007
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LIU Fang, ZHANG Nai-ming. Characteristics of Soil N and P Accumulation and Their Loss Risk in Songhuaba Reservoir[J]. Bulletin of Soiland Water Conservation, 2007, 26(3): 32-35.
DOI：

LIU Fang, ZHANG Nai-ming. Characteristics of Soil N and P Accumulation and Their Loss Risk in Songhuaba Reservoir[J]. Bulletin of Soiland Water Conservation, 2007, 26(3): 32-35. DOI：

摘要

分析了松华坝水库库区土壤的N

P累积特征。结果表明

(1)整个库区土壤(0-20 cm)全氮含量平均值为1.79 g/kg;NH

-N含量平均值为13.55 mg/kg;NO

-N含量平均值为7.29 mg/kg。全氮含量依次为:粮田＞果园＞菜地;NH4-N含量依次为:果园＞粮田＞菜地;NO3-N含量依次为:果园＞菜地＞粮田。(2)整个库区土壤(0-20 cm)全磷平均值为1.60 g/kg;速效磷含量平均值为10.36 mg/kg。全磷含量依次为:粮田＞果园＞菜地;速效磷含量依次为:菜地＞粮田＞果园。(3)入库河流的全N含量最初为Ⅱ类水

但是在入库口全N含量为Ⅴ类水。入库河流的全P含量最初为Ⅱ类水

全P含量最高为Ⅲ类水

入库口水质全P下降为Ⅲ类水。

Abstract

The N and P accumulation characteristics of soil in Songhuaba Reservoir are studied.Results show that the average content of total N of soil(0-20 cm) in the whole reservoir is 1.79 g/kg;NH4-N

13.55 mg/kg;and NO3-N

7.29 mg/kg.Landuses ranked from the high content of total N to the low are in turn the agricultural land

fruit land and vegetable land;NH4-N

in turn the fruit land

agricultural land and vegetable land;and NO3-N

in turn the fruit land

vegetable land and agricultural land.The average content of total P of soil(0-20 cm)is 1.60 g/kg

and available phosphate

10.36 mg/kg.Landuses ranked from the high content of total P to the low are in turn the agricultural land

fruit land and vegetable land;available phosphate

in turn the vegetable land

agricultural land and fruit land.The content of total N in the rivers entering the reservoir is in the 2nd grade

but falls into the 5th grade near the reservoir.The content of total P of the rivers is in the 2nd grade

and the highest content of total P is in the 3rd grade.However

the water quality falls into the 3rd grade near the reservoir.

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